heap release targets

This reverts commit abef0d85a2.

bin/org.meshtastic.meshtasticd.metainfo.xml

@@ -87,12 +87,6 @@
   </screenshots>
 
   <releases>
-    <release version="2.7.26" date="2026-06-10">
-      <url type="details">https://github.com/meshtastic/firmware/releases?q=tag%3Av2.7.26</url>
-    </release>
-    <release version="2.7.25" date="2026-05-23">
-      <url type="details">https://github.com/meshtastic/firmware/releases?q=tag%3Av2.7.25</url>
-    </release>
     <release version="2.7.24" date="2026-05-08">
       <url type="details">https://github.com/meshtastic/firmware/releases?q=tag%3Av2.7.24</url>
     </release>

debian/changelog

@@ -1,15 +1,3 @@
-meshtasticd (2.7.26.0) unstable; urgency=medium
-
-  * Version 2.7.26
-
- -- GitHub Actions <github-actions[bot]@users.noreply.github.com>  Wed, 10 Jun 2026 00:19:23 +0000
-
-meshtasticd (2.7.25.0) unstable; urgency=medium
-
-  * Version 2.7.25
-
- -- GitHub Actions <github-actions[bot]@users.noreply.github.com>  Sat, 23 May 2026 01:16:20 +0000
-
 meshtasticd (2.7.24.0) unstable; urgency=medium
 
   * Version 2.7.24

src/graphics/Screen.cpp

@@ -102,8 +102,8 @@ namespace graphics
 // if defined a pixel will blink to show redraws
 // #define SHOW_REDRAWS
 #define ASCII_BELL '\x07'
-// A text message frame + debug frame + all the node infos
-FrameCallback *normalFrames;
+// Base frames plus active module/favorite frames; grows only when the actual frameset needs it.
+static std::vector<FrameCallback> normalFrames;
 static uint32_t targetFramerate = IDLE_FRAMERATE;
 #if GRAPHICS_TFT_COLORING_ENABLED
 static inline void prepareFrameColorRegions()
@@ -136,6 +136,7 @@ uint32_t dopThresholds[5] = {2000, 1000, 500, 200, 100};
 // At some point, we're going to ask all of the modules if they would like to display a screen frame
 // we'll need to hold onto pointers for the modules that can draw a frame.
 std::vector<MeshModule *> moduleFrames;
+static uint8_t moduleFrameStart = 0;
 
 #if HAS_GPS
 // GeoCoord object for the screen
@@ -333,8 +334,14 @@ static void drawModuleFrame(OLEDDisplay *display, OLEDDisplayUiState *state, int
         // otherwise, just display the module frame that's aligned with the current frame
         module_frame = state->currentFrame;
     }
-    MeshModule &pi = *moduleFrames.at(module_frame);
-    pi.drawFrame(display, state, x, y);
+    if (module_frame < moduleFrameStart)
+        return;
+
+    const uint8_t moduleIndex = module_frame - moduleFrameStart;
+    if (moduleIndex >= moduleFrames.size() || moduleFrames[moduleIndex] == nullptr)
+        return;
+
+    moduleFrames[moduleIndex]->drawFrame(display, state, x, y);
 }
 
 /**
@@ -402,9 +409,11 @@ SPIClass SPI1(HSPI);
 #endif
 
 Screen::Screen(ScanI2C::DeviceAddress address, meshtastic_Config_DisplayConfig_OledType screenType, OLEDDISPLAY_GEOMETRY geometry)
-    : concurrency::OSThread("Screen"), address_found(address), model(screenType), geometry(geometry), cmdQueue(32)
+    : concurrency::OSThread("Screen"), address_found(address), model(screenType), geometry(geometry), cmdQueue(16)
 {
-    graphics::normalFrames = new FrameCallback[MAX_NUM_NODES + NUM_EXTRA_FRAMES];
+    normalFrames.reserve(24);
+    indicatorIcons.reserve(24);
+    moduleFrames.reserve(8);
 
 #if defined(USE_SH1106) || defined(USE_SH1107) || defined(USE_SH1107_128_64)
     dispdev = new SH1106Wire(address.address, -1, -1, geometry,
@@ -488,7 +497,6 @@ Screen::Screen(ScanI2C::DeviceAddress address, meshtastic_Config_DisplayConfig_O
 
 Screen::~Screen()
 {
-    delete[] graphics::normalFrames;
 }
 
 /**
@@ -1142,183 +1150,130 @@ void Screen::setFrames(FrameFocus focus)
     LOG_DEBUG("Show standard frames");
     showingNormalScreen = true;
 
+    normalFrames.clear();
     indicatorIcons.clear();
 
-    size_t numframes = 0;
+    auto appendFrame = [this](FrameCallback frame, const uint8_t *icon) -> uint8_t {
+        normalFrames.emplace_back(frame);
+        indicatorIcons.push_back(icon);
+        return normalFrames.size() - 1;
+    };
 
     // If we have a critical fault, show it first
-    fsi.positions.fault = numframes;
+    fsi.positions.fault = normalFrames.size();
     if (error_code) {
-        normalFrames[numframes++] = NotificationRenderer::drawCriticalFaultFrame;
-        indicatorIcons.push_back(icon_error);
+        fsi.positions.fault = appendFrame(NotificationRenderer::drawCriticalFaultFrame, icon_error);
         focus = FOCUS_FAULT; // Change our "focus" parameter, to ensure we show the fault frame
     }
 
 #if defined(DISPLAY_CLOCK_FRAME)
     if (!hiddenFrames.clock) {
-        fsi.positions.clock = numframes;
 #if defined(OLED_TINY)
-        normalFrames[numframes++] = graphics::ClockRenderer::drawAnalogClockFrame;
+        fsi.positions.clock = appendFrame(graphics::ClockRenderer::drawAnalogClockFrame, digital_icon_clock);
 #else
-        normalFrames[numframes++] = uiconfig.is_clockface_analog ? graphics::ClockRenderer::drawAnalogClockFrame
-                                                                 : graphics::ClockRenderer::drawDigitalClockFrame;
+        fsi.positions.clock = appendFrame(uiconfig.is_clockface_analog ? graphics::ClockRenderer::drawAnalogClockFrame
+                                                                       : graphics::ClockRenderer::drawDigitalClockFrame,
+                                          digital_icon_clock);
 #endif
-        indicatorIcons.push_back(digital_icon_clock);
     }
 #endif
 
     if (!hiddenFrames.home) {
-        fsi.positions.home = numframes;
-        normalFrames[numframes++] = graphics::UIRenderer::drawDeviceFocused;
-        indicatorIcons.push_back(icon_home);
+        fsi.positions.home = appendFrame(graphics::UIRenderer::drawDeviceFocused, icon_home);
     }
 
-    fsi.positions.textMessage = numframes;
-    normalFrames[numframes++] = graphics::MessageRenderer::drawTextMessageFrame;
-    indicatorIcons.push_back(icon_mail);
+    fsi.positions.textMessage = appendFrame(graphics::MessageRenderer::drawTextMessageFrame, icon_mail);
 
 #ifndef USE_EINK
     if (!hiddenFrames.nodelist_nodes) {
-        fsi.positions.nodelist_nodes = numframes;
-        normalFrames[numframes++] = graphics::NodeListRenderer::drawDynamicListScreen_Nodes;
-        indicatorIcons.push_back(icon_nodes);
+        fsi.positions.nodelist_nodes = appendFrame(graphics::NodeListRenderer::drawDynamicListScreen_Nodes, icon_nodes);
     }
     if (!hiddenFrames.nodelist_location) {
-        fsi.positions.nodelist_location = numframes;
-        normalFrames[numframes++] = graphics::NodeListRenderer::drawDynamicListScreen_Location;
-        indicatorIcons.push_back(icon_list);
+        fsi.positions.nodelist_location = appendFrame(graphics::NodeListRenderer::drawDynamicListScreen_Location, icon_list);
     }
 #endif
 
 // Show detailed node views only on E-Ink builds
 #ifdef USE_EINK
     if (!hiddenFrames.nodelist_lastheard) {
-        fsi.positions.nodelist_lastheard = numframes;
-        normalFrames[numframes++] = graphics::NodeListRenderer::drawLastHeardScreen;
-        indicatorIcons.push_back(icon_nodes);
+        fsi.positions.nodelist_lastheard = appendFrame(graphics::NodeListRenderer::drawLastHeardScreen, icon_nodes);
     }
     if (!hiddenFrames.nodelist_hopsignal) {
-        fsi.positions.nodelist_hopsignal = numframes;
-        normalFrames[numframes++] = graphics::NodeListRenderer::drawHopSignalScreen;
-        indicatorIcons.push_back(icon_signal);
+        fsi.positions.nodelist_hopsignal = appendFrame(graphics::NodeListRenderer::drawHopSignalScreen, icon_signal);
     }
     if (!hiddenFrames.nodelist_distance) {
-        fsi.positions.nodelist_distance = numframes;
-        normalFrames[numframes++] = graphics::NodeListRenderer::drawDistanceScreen;
-        indicatorIcons.push_back(icon_distance);
+        fsi.positions.nodelist_distance = appendFrame(graphics::NodeListRenderer::drawDistanceScreen, icon_distance);
     }
 #endif
 #if HAS_GPS
 #ifdef USE_EINK
     if (!hiddenFrames.nodelist_bearings) {
-        fsi.positions.nodelist_bearings = numframes;
-        normalFrames[numframes++] = graphics::NodeListRenderer::drawNodeListWithCompasses;
-        indicatorIcons.push_back(icon_list);
+        fsi.positions.nodelist_bearings = appendFrame(graphics::NodeListRenderer::drawNodeListWithCompasses, icon_list);
     }
 #endif
     if (!hiddenFrames.gps) {
-        fsi.positions.gps = numframes;
-        normalFrames[numframes++] = graphics::UIRenderer::drawCompassAndLocationScreen;
-        indicatorIcons.push_back(icon_compass);
+        fsi.positions.gps = appendFrame(graphics::UIRenderer::drawCompassAndLocationScreen, icon_compass);
     }
 #endif
     if (RadioLibInterface::instance && !hiddenFrames.lora) {
-        fsi.positions.lora = numframes;
-        normalFrames[numframes++] = graphics::DebugRenderer::drawLoRaFocused;
-        indicatorIcons.push_back(icon_radio);
+        fsi.positions.lora = appendFrame(graphics::DebugRenderer::drawLoRaFocused, icon_radio);
     }
     if (!hiddenFrames.system) {
-        fsi.positions.system = numframes;
-        normalFrames[numframes++] = graphics::DebugRenderer::drawSystemScreen;
-        indicatorIcons.push_back(icon_system);
+        fsi.positions.system = appendFrame(graphics::DebugRenderer::drawSystemScreen, icon_system);
     }
 #if !defined(DISPLAY_CLOCK_FRAME)
     if (!hiddenFrames.clock) {
-        fsi.positions.clock = numframes;
-        normalFrames[numframes++] = uiconfig.is_clockface_analog ? graphics::ClockRenderer::drawAnalogClockFrame
-                                                                 : graphics::ClockRenderer::drawDigitalClockFrame;
-        indicatorIcons.push_back(digital_icon_clock);
+        fsi.positions.clock = appendFrame(uiconfig.is_clockface_analog ? graphics::ClockRenderer::drawAnalogClockFrame
+                                                                       : graphics::ClockRenderer::drawDigitalClockFrame,
+                                          digital_icon_clock);
     }
 #endif
     if (!hiddenFrames.chirpy) {
-        fsi.positions.chirpy = numframes;
-        normalFrames[numframes++] = graphics::DebugRenderer::drawChirpy;
-        indicatorIcons.push_back(chirpy_small);
+        fsi.positions.chirpy = appendFrame(graphics::DebugRenderer::drawChirpy, chirpy_small);
     }
 
 #if HAS_WIFI && !defined(ARCH_PORTDUINO)
     if (!hiddenFrames.wifi && isWifiAvailable()) {
-        fsi.positions.wifi = numframes;
-        normalFrames[numframes++] = graphics::DebugRenderer::drawDebugInfoWiFiTrampoline;
-        indicatorIcons.push_back(icon_wifi);
+        fsi.positions.wifi = appendFrame(graphics::DebugRenderer::drawDebugInfoWiFiTrampoline, icon_wifi);
     }
 #endif
 
-    // Beware of what changes you make in this code!
-    // We pass numframes into GetMeshModulesWithUIFrames() which is highly important!
-    // Inside of that callback, goes over to MeshModule.cpp and we run
-    // modulesWithUIFrames.resize(startIndex, nullptr), to insert nullptr
-    // entries until we're ready to start building the matching entries.
-    // We are doing our best to keep the normalFrames vector
-    // and the moduleFrames vector in lock step.
-    moduleFrames = MeshModule::GetMeshModulesWithUIFrames(numframes);
+    moduleFrameStart = normalFrames.size();
+    moduleFrames = MeshModule::GetMeshModulesWithUIFrames();
     LOG_DEBUG("Show %d module frames", moduleFrames.size());
 
-    for (auto i = moduleFrames.begin(); i != moduleFrames.end(); ++i) {
-        // Draw the module frame, using the hack described above
-        if (*i != nullptr) {
-            normalFrames[numframes] = drawModuleFrame;
-
-            // Check if the module being drawn has requested focus
-            // We will honor this request later, if setFrames was triggered by a UIFrameEvent
-            MeshModule *m = *i;
-            if (m && m->isRequestingFocus())
-                fsi.positions.focusedModule = numframes;
-            if (m && m == waypointModule)
-                fsi.positions.waypoint = numframes;
-
-            indicatorIcons.push_back(icon_module);
-            numframes++;
-        }
+    for (MeshModule *m : moduleFrames) {
+        const uint8_t frameIndex = appendFrame(drawModuleFrame, icon_module);
+        if (m && m->isRequestingFocus())
+            fsi.positions.focusedModule = frameIndex;
+        if (m && m == waypointModule)
+            fsi.positions.waypoint = frameIndex;
     }
 
-    LOG_DEBUG("Added modules.  numframes: %d", numframes);
-
-    // We don't show the node info of our node (if we have it yet - we should)
-    size_t numMeshNodes = nodeDB->getNumMeshNodes();
-    if (numMeshNodes > 0)
-        numMeshNodes--;
+    LOG_DEBUG("Added modules.  numframes: %d", normalFrames.size());
 
     if (!hiddenFrames.show_favorites) {
-        // Temporary array to hold favorite node frames
-        std::vector<FrameCallback> favoriteFrames;
-
+        uint8_t firstFavorite = 255;
+        uint8_t lastFavorite = 255;
         for (size_t i = 0; i < nodeDB->getNumMeshNodes(); i++) {
             const meshtastic_NodeInfoLite *n = nodeDB->getMeshNodeByIndex(i);
             if (n && n->num != nodeDB->getNodeNum() && nodeInfoLiteIsFavorite(n)) {
-                favoriteFrames.push_back(graphics::UIRenderer::drawFavoriteNode);
+                const uint8_t frameIndex = appendFrame(graphics::UIRenderer::drawFavoriteNode, icon_node);
+                if (firstFavorite == 255)
+                    firstFavorite = frameIndex;
+                lastFavorite = frameIndex;
             }
         }
 
-        // Insert favorite frames *after* collecting them all
-        if (!favoriteFrames.empty()) {
-            fsi.positions.firstFavorite = numframes;
-            for (const auto &f : favoriteFrames) {
-                normalFrames[numframes++] = f;
-                indicatorIcons.push_back(icon_node);
-            }
-            fsi.positions.lastFavorite = numframes - 1;
-        } else {
-            fsi.positions.firstFavorite = 255;
-            fsi.positions.lastFavorite = 255;
-        }
+        fsi.positions.firstFavorite = firstFavorite;
+        fsi.positions.lastFavorite = lastFavorite;
     }
 
-    fsi.frameCount = numframes;   // Total framecount is used to apply FOCUS_PRESERVE
-    this->frameCount = numframes; // Save frame count for use in custom overlay
-    LOG_DEBUG("Finished build frames. numframes: %d", numframes);
+    fsi.frameCount = normalFrames.size();   // Total framecount is used to apply FOCUS_PRESERVE
+    this->frameCount = normalFrames.size(); // Save frame count for use in custom overlay
+    LOG_DEBUG("Finished build frames. numframes: %d", normalFrames.size());
 
-    ui->setFrames(normalFrames, numframes);
+    ui->setFrames(normalFrames.data(), fsi.frameCount);
     ui->disableAllIndicators();
 
     // Add overlays: frame icons and alert banner)

src/graphics/draw/MessageRenderer.cpp

@@ -154,8 +154,8 @@ static std::vector<uint32_t> seenPeers;
 // Public helper so menus / store can clear stale registries
 void clearThreadRegistries()
 {
-    seenChannels.clear();
-    seenPeers.clear();
+    std::vector<int>().swap(seenChannels);
+    std::vector<uint32_t>().swap(seenPeers);
 }
 
 // Setter so other code can switch threads
@@ -387,6 +387,58 @@ static void drawMessageScrollbar(OLEDDisplay *display, int visibleHeight, int to
     }
 }
 
+static void appendWrappedLines(OLEDDisplay *display, const char *messageBuf, int textWidth, std::vector<std::string> &allLines,
+                               size_t maxTotalLines, size_t maxWrappedLines)
+{
+    std::string line;
+    std::string word;
+    size_t wrappedCount = 0;
+
+    auto appendLine = [&](std::string &&newLine) -> bool {
+        if (newLine.empty())
+            return true;
+        if (allLines.size() >= maxTotalLines || wrappedCount >= maxWrappedLines)
+            return false;
+        allLines.emplace_back(std::move(newLine));
+        ++wrappedCount;
+        return true;
+    };
+
+    for (int i = 0; messageBuf[i]; ++i) {
+        char ch = messageBuf[i];
+        if ((unsigned char)messageBuf[i] == 0xE2 && (unsigned char)messageBuf[i + 1] == 0x80 &&
+            (unsigned char)messageBuf[i + 2] == 0x99) {
+            ch = '\''; // plain apostrophe
+            i += 2;    // skip over the extra UTF-8 bytes
+        }
+        if (ch == '\n') {
+            if (!word.empty())
+                line += word;
+            if (!appendLine(std::move(line)))
+                return;
+            line.clear();
+            word.clear();
+        } else if (ch == ' ') {
+            line += word + ' ';
+            word.clear();
+        } else {
+            word += ch;
+            std::string test = line + word;
+            uint16_t strWidth = graphics::UIRenderer::measureStringWithEmotes(display, test.c_str());
+            if (strWidth > textWidth) {
+                if (!line.empty() && !appendLine(std::move(line)))
+                    return;
+                line = word;
+                word.clear();
+            }
+        }
+    }
+
+    if (!word.empty())
+        line += word;
+    appendLine(std::move(line));
+}
+
 void drawTextMessageFrame(OLEDDisplay *display, OLEDDisplayUiState *state, int16_t x, int16_t y)
 {
     // Ensure any boot-relative timestamps are upgraded if RTC is valid
@@ -646,19 +698,15 @@ void drawTextMessageFrame(OLEDDisplay *display, OLEDDisplayUiState *state, int16
         const char *msgText = MessageStore::getText(m);
 
         int wrapWidth = mine ? rightTextWidth : leftTextWidth;
-        std::vector<std::string> wrapped = generateLines(display, "", msgText, wrapWidth);
         // Per-message wrap-line limit: even if wrapping produces many lines, cap them to prevent
         // a single long message from consuming most or all of the cache.
         constexpr size_t MAX_WRAPPED_LINES_PER_MSG = 20U;
-        size_t wrappedCount = 0;
-        for (auto &ln : wrapped) {
-            if (allLines.size() >= MAX_CACHED_LINES || wrappedCount >= MAX_WRAPPED_LINES_PER_MSG)
-                break; // Cache limit or per-message limit reached; stop adding lines from this message
-            allLines.emplace_back(std::move(ln));
+        const size_t previousLineCount = allLines.size();
+        appendWrappedLines(display, msgText, wrapWidth, allLines, MAX_CACHED_LINES, MAX_WRAPPED_LINES_PER_MSG);
+        for (size_t i = previousLineCount; i < allLines.size(); ++i) {
             isMine.push_back(mine);
             isHeader.push_back(false);
             ackForLine.push_back(AckStatus::NONE);
-            ++wrappedCount;
         }
     }
 
@@ -1008,20 +1056,23 @@ std::vector<int> calculateLineHeights(const std::vector<std::string> &lines, con
 
     std::vector<int> rowHeights;
     rowHeights.reserve(lines.size());
-    std::vector<graphics::EmoteRenderer::LineMetrics> lineMetrics;
-    lineMetrics.reserve(lines.size());
-
-    for (const auto &line : lines) {
-        lineMetrics.push_back(graphics::EmoteRenderer::analyzeLine(nullptr, line, FONT_HEIGHT_SMALL, emotes, numEmotes));
-    }
+    auto currentMetrics = graphics::EmoteRenderer::LineMetrics{};
+    auto nextMetrics = lines.empty()
+                           ? graphics::EmoteRenderer::LineMetrics{}
+                           : graphics::EmoteRenderer::analyzeLine(nullptr, lines[0], FONT_HEIGHT_SMALL, emotes, numEmotes);
 
     for (size_t idx = 0; idx < lines.size(); ++idx) {
+        currentMetrics = nextMetrics;
+        nextMetrics = (idx + 1 < lines.size())
+                          ? graphics::EmoteRenderer::analyzeLine(nullptr, lines[idx + 1], FONT_HEIGHT_SMALL, emotes, numEmotes)
+                          : graphics::EmoteRenderer::LineMetrics{};
+
         const int baseHeight = FONT_HEIGHT_SMALL;
         int lineHeight = baseHeight;
 
-        const int tallestEmote = lineMetrics[idx].tallestHeight;
-        const bool hasEmote = lineMetrics[idx].hasEmote;
-        const bool nextHasEmote = (idx + 1 < lines.size()) && lineMetrics[idx + 1].hasEmote;
+        const int tallestEmote = currentMetrics.tallestHeight;
+        const bool hasEmote = currentMetrics.hasEmote;
+        const bool nextHasEmote = (idx + 1 < lines.size()) && nextMetrics.hasEmote;
 
         if (isHeaderVec[idx]) {
             // Header line spacing

src/mesh/MeshModule.cpp

@@ -244,13 +244,10 @@ void setReplyTo(meshtastic_MeshPacket *p, const meshtastic_MeshPacket &to)
     p->decoded.request_id = to.id;
 }
 
-std::vector<MeshModule *> MeshModule::GetMeshModulesWithUIFrames(int startIndex)
+std::vector<MeshModule *> MeshModule::GetMeshModulesWithUIFrames()
 {
     std::vector<MeshModule *> modulesWithUIFrames;
 
-    // Fill with nullptr up to startIndex
-    modulesWithUIFrames.resize(startIndex, nullptr);
-
     if (modules) {
         for (auto i = modules->begin(); i != modules->end(); ++i) {
             auto &pi = **i;
@@ -311,4 +308,4 @@ bool MeshModule::isRequestingFocus()
     } else
         return false;
 }
-#endif
+#endif

src/mesh/MeshModule.h

@@ -76,7 +76,7 @@ class MeshModule
      */
     static void callModules(meshtastic_MeshPacket &mp, RxSource src = RX_SRC_RADIO);
 
-    static std::vector<MeshModule *> GetMeshModulesWithUIFrames(int startIndex);
+    static std::vector<MeshModule *> GetMeshModulesWithUIFrames();
     static void observeUIEvents(Observer<const UIFrameEvent *> *observer);
     static AdminMessageHandleResult handleAdminMessageForAllModules(const meshtastic_MeshPacket &mp,
                                                                     meshtastic_AdminMessage *request,

src/modules/CannedMessageModule.cpp

@@ -44,6 +44,8 @@ extern MessageStore messageStore;
 
 #include "graphics/ScreenFonts.h"
 #include <Throttle.h>
+#include <cctype>
+#include <new>
 
 // Remove Canned message screen if no action is taken for some milliseconds
 #define INACTIVATE_AFTER_MS 20000
@@ -144,6 +146,36 @@ bool hasKeyForNode(const meshtastic_NodeInfoLite *node)
 {
     return nodeInfoLiteHasUser(node) && node->public_key.size > 0;
 }
+
+static bool containsIgnoreCase(const char *text, const char *query)
+{
+    if (!query || !*query)
+        return true;
+    if (!text || !*text)
+        return false;
+
+    const size_t queryLen = strlen(query);
+    for (const char *p = text; *p; ++p) {
+        size_t i = 0;
+        while (i < queryLen && p[i] &&
+               std::tolower(static_cast<unsigned char>(p[i])) == std::tolower(static_cast<unsigned char>(query[i]))) {
+            ++i;
+        }
+        if (i == queryLen)
+            return true;
+    }
+    return false;
+}
+
+static bool activeChannelNameSeen(const std::vector<uint8_t> &activeChannelIndices, const char *name)
+{
+    for (uint8_t channelIndex : activeChannelIndices) {
+        const char *existingName = channels.getName(channelIndex);
+        if (existingName && strcmp(existingName, name) == 0)
+            return true;
+    }
+    return false;
+}
 /**
  * @brief Items in array this->messages will be set to be pointing on the right
  *     starting points of the string this->messageStore
@@ -155,10 +187,9 @@ int CannedMessageModule::splitConfiguredMessages()
 {
     int i = 0;
 
-    String canned_messages = cannedMessageModuleConfig.messages;
-
     // Copy all message parts into the buffer
-    strncpy(this->messageBuffer, canned_messages.c_str(), sizeof(this->messageBuffer));
+    strncpy(this->messageBuffer, cannedMessageModuleConfig.messages, sizeof(this->messageBuffer) - 1);
+    this->messageBuffer[sizeof(this->messageBuffer) - 1] = '\0';
 
     // Temporary array to allow for insertion
     const char *tempMessages[CANNED_MESSAGE_MODULE_MESSAGE_MAX_COUNT + 3] = {0};
@@ -222,7 +253,7 @@ void CannedMessageModule::resetSearch()
 {
     int previousDestIndex = destIndex;
 
-    searchQuery = "";
+    searchQuery[0] = '\0';
     updateDestinationSelectionList();
 
     // Adjust scrollIndex so previousDestIndex is still visible
@@ -238,26 +269,21 @@ void CannedMessageModule::resetSearch()
 }
 void CannedMessageModule::updateDestinationSelectionList()
 {
-    static size_t lastNumMeshNodes = 0;
-    static String lastSearchQuery = "";
-
     size_t numMeshNodes = nodeDB->getNumMeshNodes();
-    bool nodesChanged = (numMeshNodes != lastNumMeshNodes);
-    lastNumMeshNodes = numMeshNodes;
+    bool nodesChanged = (numMeshNodes != cachedDestinationNodeCount);
+    cachedDestinationNodeCount = numMeshNodes;
 
     // Early exit if nothing changed
-    if (searchQuery == lastSearchQuery && !nodesChanged)
+    if (destinationSelectionCacheValid && strcmp(searchQuery, cachedDestinationSearchQuery) == 0 && !nodesChanged)
         return;
-    lastSearchQuery = searchQuery;
+    strncpy(cachedDestinationSearchQuery, searchQuery, sizeof(cachedDestinationSearchQuery) - 1);
+    cachedDestinationSearchQuery[sizeof(cachedDestinationSearchQuery) - 1] = '\0';
     needsUpdate = false;
 
     this->filteredNodes.clear();
     this->activeChannelIndices.clear();
 
     NodeNum myNodeNum = nodeDB->getNodeNum();
-    String lowerSearchQuery = searchQuery;
-    lowerSearchQuery.toLowerCase();
-
     // Preallocate space to reduce reallocation
     this->filteredNodes.reserve(numMeshNodes);
 
@@ -266,38 +292,27 @@ void CannedMessageModule::updateDestinationSelectionList()
         if (!node || node->num == myNodeNum || !nodeInfoLiteHasUser(node) || node->public_key.size != 32)
             continue;
 
-        const String &nodeName = node->long_name;
+        const char *nodeName = node->long_name;
+        const char *shortName = node->short_name;
 
-        if (searchQuery.length() == 0) {
+        if (searchQuery[0] == '\0') {
+            this->filteredNodes.push_back({node, sinceLastSeen(node)});
+        } else if (containsIgnoreCase(nodeName, searchQuery) || containsIgnoreCase(shortName, searchQuery)) {
             this->filteredNodes.push_back({node, sinceLastSeen(node)});
-        } else {
-            // Avoid unnecessary lowercase conversion if already matched
-            String lowerNodeName = nodeName;
-            lowerNodeName.toLowerCase();
-
-            if (lowerNodeName.indexOf(lowerSearchQuery) != -1) {
-                this->filteredNodes.push_back({node, sinceLastSeen(node)});
-            }
         }
     }
 
-    meshtastic_MeshPacket *p = allocDataPacket();
-    p->pki_encrypted = true;
-    p->channel = 0;
-
     // Populate active channels
-    std::vector<String> seenChannels;
-    seenChannels.reserve(channels.getNumChannels());
     for (uint8_t i = 0; i < channels.getNumChannels(); ++i) {
-        String name = channels.getName(i);
-        if (name.length() > 0 && std::find(seenChannels.begin(), seenChannels.end(), name) == seenChannels.end()) {
+        const char *name = channels.getName(i);
+        if (name && name[0] && !activeChannelNameSeen(activeChannelIndices, name)) {
             this->activeChannelIndices.push_back(i);
-            seenChannels.push_back(name);
         }
     }
 
     scrollIndex = 0; // Show first result at the top
     destIndex = 0;   // Highlight the first entry
+    destinationSelectionCacheValid = true;
     if (nodesChanged && runState == CANNED_MESSAGE_RUN_STATE_DESTINATION_SELECTION) {
         LOG_INFO("Nodes changed, forcing UI refresh.");
         screen->forceDisplay();
@@ -480,7 +495,11 @@ int CannedMessageModule::handleInputEvent(const InputEvent *event)
 
 void CannedMessageModule::updateState(cannedMessageModuleRunState newState, bool shouldRequestFocus)
 {
+    cannedMessageModuleRunState oldState = runState;
     runState = newState;
+    if (oldState == CANNED_MESSAGE_RUN_STATE_DESTINATION_SELECTION && newState != CANNED_MESSAGE_RUN_STATE_DESTINATION_SELECTION) {
+        releaseDestinationSelectionCache();
+    }
     if (runState == CANNED_MESSAGE_RUN_STATE_FREETEXT) {
         inputBroker->menuMode =
             false; // Allow any key input to be sent to the message composer instead of being interpreted as menu navigation
@@ -492,6 +511,26 @@ void CannedMessageModule::updateState(cannedMessageModuleRunState newState, bool
     }
 }
 
+void CannedMessageModule::releaseDestinationSelectionCache()
+{
+    searchQuery[0] = '\0';
+    cachedDestinationSearchQuery[0] = '\0';
+    cachedDestinationNodeCount = 0;
+    destinationSelectionCacheValid = false;
+    destIndex = 0;
+    scrollIndex = 0;
+
+    std::vector<uint8_t>().swap(activeChannelIndices);
+    std::vector<NodeEntry>().swap(filteredNodes);
+}
+
+void CannedMessageModule::releaseFreetext()
+{
+    freetext.~String();
+    new (&freetext) String();
+    cursor = 0;
+}
+
 bool CannedMessageModule::isUpEvent(const InputEvent *event)
 {
     return event->inputEvent == INPUT_BROKER_UP ||
@@ -547,11 +586,15 @@ int CannedMessageModule::handleDestinationSelectionInput(const InputEvent *event
 
     if (event->kbchar >= 32 && event->kbchar <= 126 && !isUp && !isDown && event->inputEvent != INPUT_BROKER_LEFT &&
         event->inputEvent != INPUT_BROKER_RIGHT && event->inputEvent != INPUT_BROKER_SELECT) {
-        this->searchQuery += (char)event->kbchar;
-        needsUpdate = true;
-        if ((millis() - lastFilterUpdate) > filterDebounceMs) {
-            runOnce(); // update filter immediately
-            lastFilterUpdate = millis();
+        size_t queryLen = strlen(searchQuery);
+        if (queryLen + 1 < sizeof(searchQuery)) {
+            searchQuery[queryLen] = static_cast<char>(event->kbchar);
+            searchQuery[queryLen + 1] = '\0';
+            needsUpdate = true;
+            if ((millis() - lastFilterUpdate) > filterDebounceMs) {
+                runOnce(); // update filter immediately
+                lastFilterUpdate = millis();
+            }
         }
         return 1;
     }
@@ -565,12 +608,13 @@ int CannedMessageModule::handleDestinationSelectionInput(const InputEvent *event
 
     // Handle backspace
     if (event->inputEvent == INPUT_BROKER_BACK) {
-        if (searchQuery.length() > 0) {
-            searchQuery.remove(searchQuery.length() - 1);
+        size_t queryLen = strlen(searchQuery);
+        if (queryLen > 0) {
+            searchQuery[queryLen - 1] = '\0';
             needsUpdate = true;
             runOnce();
         }
-        if (searchQuery.length() == 0) {
+        if (searchQuery[0] == '\0') {
             resetSearch();
             needsUpdate = false;
         }
@@ -641,7 +685,7 @@ int CannedMessageModule::handleDestinationSelectionInput(const InputEvent *event
     if (event->inputEvent == INPUT_BROKER_CANCEL || event->inputEvent == INPUT_BROKER_ALT_LONG) {
         updateState(returnToCannedList ? CANNED_MESSAGE_RUN_STATE_ACTIVE : CANNED_MESSAGE_RUN_STATE_FREETEXT, true);
         returnToCannedList = false;
-        searchQuery = "";
+        searchQuery[0] = '\0';
 
         // UIFrameEvent e;
         // e.action = UIFrameEvent::Action::REGENERATE_FRAMESET;
@@ -671,8 +715,7 @@ bool CannedMessageModule::handleMessageSelectorInput(const InputEvent *event, bo
     if (runState != CANNED_MESSAGE_RUN_STATE_INACTIVE &&
         (event->inputEvent == INPUT_BROKER_CANCEL || event->inputEvent == INPUT_BROKER_ALT_LONG)) {
         updateState(CANNED_MESSAGE_RUN_STATE_INACTIVE);
-        freetext = "";
-        cursor = 0;
+        releaseFreetext();
         payload = 0;
         currentMessageIndex = -1;
 
@@ -762,8 +805,7 @@ bool CannedMessageModule::handleMessageSelectorInput(const InputEvent *event, bo
                         // Return to inactive state
                         this->updateState(CANNED_MESSAGE_RUN_STATE_INACTIVE);
                         this->currentMessageIndex = -1;
-                        this->freetext = "";
-                        this->cursor = 0;
+                        this->releaseFreetext();
 
                         // Force display update to show normal screen
                         UIFrameEvent e;
@@ -822,8 +864,7 @@ bool CannedMessageModule::handleFreeTextInput(const InputEvent *event)
     // Cancel (dismiss freetext screen)
     if (event->inputEvent == INPUT_BROKER_LEFT) {
         updateState(CANNED_MESSAGE_RUN_STATE_INACTIVE);
-        freetext = "";
-        cursor = 0;
+        releaseFreetext();
         payload = 0;
         currentMessageIndex = -1;
 
@@ -946,8 +987,7 @@ bool CannedMessageModule::handleFreeTextInput(const InputEvent *event)
     if (event->inputEvent == INPUT_BROKER_CANCEL || event->inputEvent == INPUT_BROKER_ALT_LONG ||
         (event->inputEvent == INPUT_BROKER_BACK && this->freetext.length() == 0)) {
         updateState(CANNED_MESSAGE_RUN_STATE_INACTIVE);
-        freetext = "";
-        cursor = 0;
+        releaseFreetext();
         payload = 0;
         currentMessageIndex = -1;
 
@@ -1187,8 +1227,7 @@ int32_t CannedMessageModule::runOnce()
         UIFrameEvent e;
         e.action = UIFrameEvent::Action::REGENERATE_FRAMESET;
         this->currentMessageIndex = -1;
-        this->freetext = "";
-        this->cursor = 0;
+        this->releaseFreetext();
         this->notifyObservers(&e);
         return 2000;
     }
@@ -1201,24 +1240,21 @@ int32_t CannedMessageModule::runOnce()
         this->updateState(CANNED_MESSAGE_RUN_STATE_INACTIVE);
         e.action = UIFrameEvent::Action::REGENERATE_FRAMESET;
         this->currentMessageIndex = -1;
-        this->freetext = "";
-        this->cursor = 0;
+        this->releaseFreetext();
         this->notifyObservers(&e);
     }
     // Handle SENDING_ACTIVE state transition after virtual keyboard message
     else if (this->runState == CANNED_MESSAGE_RUN_STATE_SENDING_ACTIVE && this->payload == 0) {
         this->updateState(CANNED_MESSAGE_RUN_STATE_INACTIVE);
         this->currentMessageIndex = -1;
-        this->freetext = "";
-        this->cursor = 0;
+        this->releaseFreetext();
         return INT32_MAX;
     } else if (((this->runState == CANNED_MESSAGE_RUN_STATE_ACTIVE) || (this->runState == CANNED_MESSAGE_RUN_STATE_FREETEXT)) &&
                !Throttle::isWithinTimespanMs(this->lastTouchMillis, INACTIVATE_AFTER_MS)) {
         // Reset module on inactivity
         e.action = UIFrameEvent::Action::REGENERATE_FRAMESET;
         this->currentMessageIndex = -1;
-        this->freetext = "";
-        this->cursor = 0;
+        this->releaseFreetext();
         this->updateState(CANNED_MESSAGE_RUN_STATE_INACTIVE);
 
         // Clean up virtual keyboard if it exists during timeout
@@ -1240,8 +1276,7 @@ int32_t CannedMessageModule::runOnce()
 
                 // Clean up state but *don’t* deactivate yet
                 this->currentMessageIndex = -1;
-                this->freetext = "";
-                this->cursor = 0;
+                this->releaseFreetext();
 
                 // Tell Screen to jump straight to the TextMessage frame
                 e.action = UIFrameEvent::Action::SWITCH_TO_TEXTMESSAGE;
@@ -1267,8 +1302,7 @@ int32_t CannedMessageModule::runOnce()
 
                     // Clean up state
                     this->currentMessageIndex = -1;
-                    this->freetext = "";
-                    this->cursor = 0;
+                    this->releaseFreetext();
 
                     // Tell Screen to jump straight to the TextMessage frame
                     e.action = UIFrameEvent::Action::SWITCH_TO_TEXTMESSAGE;
@@ -1285,8 +1319,7 @@ int32_t CannedMessageModule::runOnce()
         }
         // fallback clean-up if nothing above returned
         this->currentMessageIndex = -1;
-        this->freetext = "";
-        this->cursor = 0;
+        this->releaseFreetext();
 
         e.action = UIFrameEvent::Action::REGENERATE_FRAMESET;
         this->notifyObservers(&e);
@@ -1312,15 +1345,13 @@ int32_t CannedMessageModule::runOnce()
     } else if (this->runState == CANNED_MESSAGE_RUN_STATE_ACTION_UP) {
         if (this->messagesCount > 0) {
             this->currentMessageIndex = getPrevIndex();
-            this->freetext = "";
-            this->cursor = 0;
+            this->releaseFreetext();
             this->updateState(CANNED_MESSAGE_RUN_STATE_ACTIVE);
         }
     } else if (this->runState == CANNED_MESSAGE_RUN_STATE_ACTION_DOWN) {
         if (this->messagesCount > 0) {
             this->currentMessageIndex = this->getNextIndex();
-            this->freetext = "";
-            this->cursor = 0;
+            this->releaseFreetext();
             this->updateState(CANNED_MESSAGE_RUN_STATE_ACTIVE);
         }
     } else if (this->runState == CANNED_MESSAGE_RUN_STATE_FREETEXT || this->runState == CANNED_MESSAGE_RUN_STATE_ACTIVE) {
@@ -1494,8 +1525,10 @@ void CannedMessageModule::drawKeyboard(OLEDDisplay *display, OLEDDisplayUiState
 
     display->setColor(OLEDDISPLAY_COLOR::WHITE);
 
-    display->drawStringMaxWidth(0, 0, display->getWidth(),
-                                cannedMessageModule->drawWithCursor(cannedMessageModule->freetext, cannedMessageModule->cursor));
+    char msgWithCursor[meshtastic_Constants_DATA_PAYLOAD_LEN + 2];
+    cannedMessageModule->drawWithCursor(msgWithCursor, sizeof(msgWithCursor), cannedMessageModule->freetext.c_str(),
+                                        cannedMessageModule->cursor);
+    display->drawStringMaxWidth(0, 0, display->getWidth(), msgWithCursor);
 
     display->setFont(FONT_MEDIUM);
 
@@ -1681,8 +1714,11 @@ void CannedMessageModule::drawDestinationSelectionScreen(OLEDDisplay *display, O
 
     // Header
     int titleY = 2;
-    String titleText = "Select Destination";
-    titleText += searchQuery.length() > 0 ? " [" + searchQuery + "]" : " [ ]";
+    char titleText[64];
+    if (searchQuery[0])
+        snprintf(titleText, sizeof(titleText), "Select Destination [%s]", searchQuery);
+    else
+        snprintf(titleText, sizeof(titleText), "Select Destination [ ]");
     display->setTextAlignment(TEXT_ALIGN_CENTER);
     display->drawString(display->getWidth() / 2, titleY, titleText);
     display->setTextAlignment(TEXT_ALIGN_LEFT);
@@ -1709,26 +1745,27 @@ void CannedMessageModule::drawDestinationSelectionScreen(OLEDDisplay *display, O
 
         int xOffset = 0;
         int yOffset = row * (FONT_HEIGHT_SMALL - 4) + rowYOffset;
-        std::string entryText;
+        char entryText[96] = "";
 
         // Draw Channels First
         if (itemIndex < numActiveChannels) {
             uint8_t channelIndex = this->activeChannelIndices[itemIndex];
             const char *channelName = channels.getName(channelIndex);
-            entryText = std::string("#") + (channelName ? channelName : "?");
+            snprintf(entryText, sizeof(entryText), "#%s", channelName ? channelName : "?");
         }
         // Then Draw Nodes
         else {
             int nodeIndex = itemIndex - numActiveChannels;
             if (nodeIndex >= 0 && nodeIndex < static_cast<int>(this->filteredNodes.size())) {
                 meshtastic_NodeInfoLite *node = this->filteredNodes[nodeIndex].node;
+                const char *nodeName = nullptr;
                 if (node) {
                     if (display->getWidth() <= 64) {
-                        entryText = node->short_name;
+                        nodeName = node->short_name;
                     } else if (node->long_name[0]) {
-                        entryText = node->long_name;
+                        nodeName = node->long_name;
                     } else {
-                        entryText = node->short_name;
+                        nodeName = node->short_name;
                     }
                 }
 
@@ -1738,22 +1775,21 @@ void CannedMessageModule::drawDestinationSelectionScreen(OLEDDisplay *display, O
                 if (availWidth < 0)
                     availWidth = 0;
                 char truncatedEntry[96];
-                graphics::UIRenderer::truncateStringWithEmotes(display, entryText.c_str(), truncatedEntry, sizeof(truncatedEntry),
+                graphics::UIRenderer::truncateStringWithEmotes(display, nodeName ? nodeName : "", truncatedEntry, sizeof(truncatedEntry),
                                                                availWidth);
-                entryText = truncatedEntry;
+                snprintf(entryText, sizeof(entryText), "%s", truncatedEntry);
 
                 // Prepend "* " if this is a favorite
                 if (nodeInfoLiteIsFavorite(node)) {
-                    entryText = "* " + entryText;
+                    snprintf(entryText, sizeof(entryText), "* %s", truncatedEntry);
                 }
-                graphics::UIRenderer::truncateStringWithEmotes(display, entryText.c_str(), truncatedEntry, sizeof(truncatedEntry),
-                                                               availWidth);
-                entryText = truncatedEntry;
+                graphics::UIRenderer::truncateStringWithEmotes(display, entryText, truncatedEntry, sizeof(truncatedEntry), availWidth);
+                snprintf(entryText, sizeof(entryText), "%s", truncatedEntry);
             }
         }
 
-        if (entryText.empty() || entryText == "Unknown")
-            entryText = "?";
+        if (entryText[0] == '\0' || strcmp(entryText, "Unknown") == 0)
+            snprintf(entryText, sizeof(entryText), "?");
 
         // Highlight background (if selected)
         if (itemIndex == destIndex) {
@@ -1763,7 +1799,7 @@ void CannedMessageModule::drawDestinationSelectionScreen(OLEDDisplay *display, O
         }
 
         // Draw entry text
-        graphics::UIRenderer::drawStringWithEmotes(display, xOffset + 2, yOffset, entryText.c_str(), FONT_HEIGHT_SMALL, 1, false);
+        graphics::UIRenderer::drawStringWithEmotes(display, xOffset + 2, yOffset, entryText, FONT_HEIGHT_SMALL, 1, false);
         display->setColor(WHITE);
 
         // Draw key icon (after highlight)
@@ -2022,8 +2058,9 @@ void CannedMessageModule::drawFrame(OLEDDisplay *display, OLEDDisplayUiState *st
         display->setColor(WHITE);
         {
             int inputY = 0 + y + FONT_HEIGHT_SMALL;
-            String msgWithCursor = this->drawWithCursor(this->freetext, this->cursor);
-            drawWrappedEmoteText(display, x, inputY, msgWithCursor.c_str(), display->getWidth() - x, FONT_HEIGHT_SMALL);
+            char msgWithCursor[meshtastic_Constants_DATA_PAYLOAD_LEN + 2];
+            this->drawWithCursor(msgWithCursor, sizeof(msgWithCursor), this->freetext.c_str(), this->cursor);
+            drawWrappedEmoteText(display, x, inputY, msgWithCursor, display->getWidth() - x, FONT_HEIGHT_SMALL);
         }
 #endif
         return;
@@ -2368,10 +2405,27 @@ void CannedMessageModule::handleSetCannedMessageModuleMessages(const char *from_
     }
 }
 
-String CannedMessageModule::drawWithCursor(String text, int cursor)
+void CannedMessageModule::drawWithCursor(char *buffer, size_t bufferSize, const char *text, size_t cursor)
 {
-    String result = text.substring(0, cursor) + "_" + text.substring(cursor);
-    return result;
+    if (!buffer || bufferSize == 0)
+        return;
+
+    const char *source = text ? text : "";
+    const size_t sourceLen = strlen(source);
+    const size_t cursorIndex = std::min(cursor, sourceLen);
+    const size_t beforeLen = std::min(cursorIndex, bufferSize - 1);
+
+    memcpy(buffer, source, beforeLen);
+    size_t outLen = beforeLen;
+
+    if (outLen < bufferSize - 1)
+        buffer[outLen++] = '_';
+
+    const size_t remaining = bufferSize - 1 - outLen;
+    const size_t afterLen = std::min(sourceLen - cursorIndex, remaining);
+    memcpy(buffer + outLen, source + cursorIndex, afterLen);
+    outLen += afterLen;
+    buffer[outLen] = '\0';
 }
 
 #endif

src/modules/CannedMessageModule.h

@@ -75,7 +75,7 @@ class CannedMessageModule : public SinglePortModule, public Observable<const UIF
     void updateDestinationSelectionList();
     void drawDestinationSelectionScreen(OLEDDisplay *display, OLEDDisplayUiState *state, int16_t x, int16_t y);
     bool isCharInputAllowed() const;
-    String drawWithCursor(String text, int cursor);
+    void drawWithCursor(char *buffer, size_t bufferSize, const char *text, size_t cursor);
 
     // === Emote Picker ===
     int handleEmotePickerInput(const InputEvent *event);
@@ -146,7 +146,8 @@ class CannedMessageModule : public SinglePortModule, public Observable<const UIF
     int visibleRows = 0;
     bool needsUpdate = true;
     unsigned long lastUpdateMillis = 0;
-    String searchQuery;
+    static constexpr size_t searchQuerySize = 33;
+    char searchQuery[searchQuerySize] = {0};
     String freetext;
 
     // === Message Storage ===
@@ -175,6 +176,9 @@ class CannedMessageModule : public SinglePortModule, public Observable<const UIF
     unsigned long lastTouchMillis = 0;
     uint32_t lastFilterUpdate = 0;
     static constexpr uint32_t filterDebounceMs = 30;
+    size_t cachedDestinationNodeCount = 0;
+    char cachedDestinationSearchQuery[searchQuerySize] = {0};
+    bool destinationSelectionCacheValid = false;
     std::vector<uint8_t> activeChannelIndices;
     std::vector<NodeEntry> filteredNodes;
 
@@ -184,6 +188,8 @@ class CannedMessageModule : public SinglePortModule, public Observable<const UIF
 #endif
 
     void updateState(cannedMessageModuleRunState, bool shouldRequestFocus = false);
+    void releaseDestinationSelectionCache();
+    void releaseFreetext();
 
     bool isUpEvent(const InputEvent *event);
     bool isDownEvent(const InputEvent *event);

src/modules/NodeInfoModule.cpp

@@ -158,8 +158,8 @@ meshtastic_MeshPacket *NodeInfoModule::allocReply()
         ignoreRequest = true;
         return NULL;
     } else {
-        ignoreRequest = false; // Don't ignore requests anymore
-        meshtastic_User &u = owner;
+        ignoreRequest = false;     // Don't ignore requests anymore
+        meshtastic_User u = owner; // deliberate copy: the licensed strip below must not clobber the global owner state
 
         // Strip the public key if the user is licensed
         if (u.is_licensed && u.public_key.size > 0) {

src/modules/OnScreenKeyboardModule.cpp

@@ -193,24 +193,36 @@ void OnScreenKeyboardModule::drawPopup(OLEDDisplay *display)
     display->setTextAlignment(TEXT_ALIGN_LEFT);
     const uint16_t maxWrapWidth = display->width() - 40;
 
-    auto wrapText = [&](const char *text, uint16_t availableWidth) -> std::vector<std::string> {
-        std::vector<std::string> wrapped;
+    char lineStorage[maxContentLines + 1][64] = {};
+    const char *linePtrs[maxContentLines + 2] = {};
+    uint8_t lineCount = 0;
+
+    auto appendLine = [&](const std::string &line) {
+        if (line.empty() || lineCount >= maxContentLines + (hasTitle ? 1 : 0))
+            return;
+        strncpy(lineStorage[lineCount], line.c_str(), sizeof(lineStorage[lineCount]) - 1);
+        lineStorage[lineCount][sizeof(lineStorage[lineCount]) - 1] = '\0';
+        linePtrs[lineCount] = lineStorage[lineCount];
+        ++lineCount;
+    };
+
+    auto wrapText = [&](const char *text, uint16_t availableWidth) {
         std::string current;
         std::string word;
         const char *p = text;
-        while (*p && wrapped.size() < maxContentLines) {
+        while (*p && lineCount < maxContentLines + (hasTitle ? 1 : 0)) {
             while (*p && (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r')) {
                 if (*p == '\n') {
                     if (!current.empty()) {
-                        wrapped.push_back(current);
+                        appendLine(current);
                         current.clear();
-                        if (wrapped.size() >= maxContentLines)
+                        if (lineCount >= maxContentLines + (hasTitle ? 1 : 0))
                             break;
                     }
                 }
                 ++p;
             }
-            if (!*p || wrapped.size() >= maxContentLines)
+            if (!*p || lineCount >= maxContentLines + (hasTitle ? 1 : 0))
                 break;
             word.clear();
             while (*p && *p != ' ' && *p != '\t' && *p != '\n' && *p != '\r')
@@ -223,9 +235,9 @@ void OnScreenKeyboardModule::drawPopup(OLEDDisplay *display)
                 current = test;
             else {
                 if (!current.empty()) {
-                    wrapped.push_back(current);
+                    appendLine(current);
                     current = word;
-                    if (wrapped.size() >= maxContentLines)
+                    if (lineCount >= maxContentLines + (hasTitle ? 1 : 0))
                         break;
                 } else {
                     current = word;
@@ -235,36 +247,26 @@ void OnScreenKeyboardModule::drawPopup(OLEDDisplay *display)
                 }
             }
         }
-        if (!current.empty() && wrapped.size() < maxContentLines)
-            wrapped.push_back(current);
-        return wrapped;
+        if (!current.empty() && lineCount < maxContentLines + (hasTitle ? 1 : 0))
+            appendLine(current);
     };
 
-    std::vector<std::string> allLines;
     if (hasTitle)
-        allLines.emplace_back(popupTitle);
+        appendLine(popupTitle);
 
     char buf[sizeof(popupMessage)];
     strncpy(buf, popupMessage, sizeof(buf) - 1);
     buf[sizeof(buf) - 1] = '\0';
     char *paragraph = strtok(buf, "\n");
-    while (paragraph && allLines.size() < maxContentLines + (hasTitle ? 1 : 0)) {
-        auto wrapped = wrapText(paragraph, maxWrapWidth);
-        for (const auto &ln : wrapped) {
-            if (allLines.size() >= maxContentLines + (hasTitle ? 1 : 0))
-                break;
-            allLines.push_back(ln);
-        }
+    while (paragraph && lineCount < maxContentLines + (hasTitle ? 1 : 0)) {
+        wrapText(paragraph, maxWrapWidth);
         paragraph = strtok(nullptr, "\n");
     }
 
-    std::vector<const char *> ptrs;
-    for (const auto &ln : allLines)
-        ptrs.push_back(ln.c_str());
-    ptrs.push_back(nullptr);
+    linePtrs[lineCount] = nullptr;
 
     // Use the standard notification box drawing from NotificationRenderer
-    NotificationRenderer::drawNotificationBox(display, nullptr, ptrs.data(), allLines.size(), 0, 0);
+    NotificationRenderer::drawNotificationBox(display, nullptr, linePtrs, lineCount, 0, 0);
 }
 
 } // namespace graphics

src/modules/TraceRouteModule.cpp

@@ -21,7 +21,7 @@ void TraceRouteModule::setResultText(const String &text)
 
 void TraceRouteModule::clearResultLines()
 {
-    resultLines.clear();
+    std::vector<String>().swap(resultLines);
     resultLinesDirty = false;
 }
 #if HAS_SCREEN

src/mqtt/ServiceEnvelope.h

@@ -5,7 +5,8 @@
 // meshtastic_ServiceEnvelope that automatically releases dynamically allocated memory when it goes out of scope.
 struct DecodedServiceEnvelope : public meshtastic_ServiceEnvelope {
     DecodedServiceEnvelope(const uint8_t *payload, size_t length);
-    DecodedServiceEnvelope(DecodedServiceEnvelope &) = delete;
+    // const-qualified so std::variant instantiation works on Apple libc++ (copying stays ill-formed either way)
+    DecodedServiceEnvelope(const DecodedServiceEnvelope &) = delete;
     DecodedServiceEnvelope(DecodedServiceEnvelope &&);
     ~DecodedServiceEnvelope();
     // Clients must check that this is true before using.

test/test_http_content_handler/test_main.cpp

@@ -1,4 +1,5 @@
 #include "TestUtil.h"
+#include <cstdlib>
 #include <unity.h>
 
 static void test_placeholder()

test/test_traffic_management/test_main.cpp

@@ -1,4 +1,5 @@
 #include "TestUtil.h"
+#include <cstdlib>
 #include <unity.h>
 
 #if defined(ARCH_PORTDUINO)

variants/native/portduino.ini

@@ -55,7 +55,6 @@ build_flags_common =
   -lyaml-cpp
   -ljsoncpp
   !pkg-config --cflags jsoncpp --silence-errors || :
-  -li2c
   -luv
   -std=gnu17
   -std=gnu++17

version.properties

@@ -1,4 +1,4 @@
 [VERSION]  
 major = 2
-minor = 7
-build = 26
+minor = 8
+build = 0