diff --git a/wled00/FX.cpp b/wled00/FX.cpp
index 8e8aa98e60..5839389ed0 100644
--- a/wled00/FX.cpp
+++ b/wled00/FX.cpp
@@ -197,7 +197,7 @@ static const char _data_FX_MODE_STROBE_RAINBOW[] PROGMEM = "Strobe Rainbow@!;,!;
  * if (bool rev == true) then LEDs are turned off in reverse order
  */
 uint16_t color_wipe(bool rev, bool useRandomColors) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   uint32_t cycleTime = 750 + (255 - SEGMENT.speed)*150;
   uint32_t perc = strip.now % cycleTime;
   unsigned prog = (perc * 65535) / cycleTime;
@@ -410,7 +410,7 @@ static const char _data_FX_MODE_FADE[] PROGMEM = "Fade@!;!,!;!;01";
  * Scan mode parent function
  */
 uint16_t scan(bool dual) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   uint32_t cycleTime = 750 + (255 - SEGMENT.speed)*150;
   uint32_t perc = strip.now % cycleTime;
   int prog = (perc * 65535) / cycleTime;
@@ -1023,7 +1023,7 @@ static const char _data_FX_MODE_COLORFUL[] PROGMEM = "Colorful@!,Saturation;1,2,
  * Emulates a traffic light.
  */
 uint16_t mode_traffic_light(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   for (unsigned i=0; i < SEGLEN; i++)
     SEGMENT.setPixelColor(i, SEGMENT.color_from_palette(i, true, PALETTE_SOLID_WRAP, 1));
   uint32_t mdelay = 500;
@@ -1056,7 +1056,7 @@ static const char _data_FX_MODE_TRAFFIC_LIGHT[] PROGMEM = "Traffic Light@!,US st
  */
 #define FLASH_COUNT 4
 uint16_t mode_chase_flash(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned flash_step = SEGENV.call % ((FLASH_COUNT * 2) + 1);
 
   for (unsigned i = 0; i < SEGLEN; i++) {
@@ -1086,7 +1086,7 @@ static const char _data_FX_MODE_CHASE_FLASH[] PROGMEM = "Chase Flash@!;Bg,Fx;!";
  * Prim flashes running, followed by random color.
  */
 uint16_t mode_chase_flash_random(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned flash_step = SEGENV.call % ((FLASH_COUNT * 2) + 1);
 
   for (int i = 0; i < SEGENV.aux1; i++) {
@@ -1168,7 +1168,7 @@ static const char _data_FX_MODE_RUNNING_RANDOM[] PROGMEM = "Stream@!,Zone size;;
  * K.I.T.T.
  */
 uint16_t mode_larson_scanner(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
 
   const unsigned speed  = FRAMETIME * map(SEGMENT.speed, 0, 255, 96, 2); // map into useful range
   const unsigned pixels = SEGLEN / speed; // how many pixels to advance per frame
@@ -1226,7 +1226,7 @@ static const char _data_FX_MODE_DUAL_LARSON_SCANNER[] PROGMEM = "Scanner Dual@!,
  * Firing comets from one end. "Lighthouse"
  */
 uint16_t mode_comet(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned counter = (strip.now * ((SEGMENT.speed >>2) +1)) & 0xFFFF;
   unsigned index = (counter * SEGLEN) >> 16;
   if (SEGENV.call == 0) SEGENV.aux0 = index;
@@ -1254,7 +1254,7 @@ static const char _data_FX_MODE_COMET[] PROGMEM = "Lighthouse@!,Fade rate;!,!;!"
  * Fireworks function.
  */
 uint16_t mode_fireworks() {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   const uint16_t width  = SEGMENT.is2D() ? SEG_W : SEGLEN;
   const uint16_t height = SEG_H;
 
@@ -1296,7 +1296,7 @@ static const char _data_FX_MODE_FIREWORKS[] PROGMEM = "Fireworks@,Frequency;!,!;
 
 //Twinkling LEDs running. Inspired by https://github.com/kitesurfer1404/WS2812FX/blob/master/src/custom/Rain.h
 uint16_t mode_rain() {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   const unsigned width  = SEG_W;
   const unsigned height = SEG_H;
   SEGENV.step += FRAMETIME;
@@ -1362,7 +1362,7 @@ static const char _data_FX_MODE_FIRE_FLICKER[] PROGMEM = "Fire Flicker@!,!;!;!;0
  * Gradient run base function
  */
 uint16_t gradient_base(bool loading) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   uint16_t counter = strip.now * ((SEGMENT.speed >> 2) + 1);
   uint16_t pp = (counter * SEGLEN) >> 16;
   if (SEGENV.call == 0) pp = 0;
@@ -1407,7 +1407,7 @@ static const char _data_FX_MODE_LOADING[] PROGMEM = "Loading@!,Fade;!,!;!;;ix=16
  * Two dots running
  */
 uint16_t mode_two_dots() {
- if (SEGLEN == 1) return mode_static();
+ if (SEGLEN <= 1) return mode_static();
   unsigned delay = 1 + (FRAMETIME<<3) / SEGLEN;  // longer segments should change faster
   uint32_t it = strip.now / map(SEGMENT.speed, 0, 255, delay<<4, delay);
   unsigned offset = it % SEGLEN;
@@ -1858,7 +1858,7 @@ static const char _data_FX_MODE_OSCILLATE[] PROGMEM = "Oscillate";
 
 //TODO
 uint16_t mode_lightning(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned ledstart = hw_random16(SEGLEN);               // Determine starting location of flash
   unsigned ledlen = 1 + hw_random16(SEGLEN -ledstart);   // Determine length of flash (not to go beyond NUM_LEDS-1)
   uint8_t bri = 255/hw_random8(1, 3);
@@ -1944,7 +1944,7 @@ static const char _data_FX_MODE_PRIDE_2015[] PROGMEM = "Pride 2015@!;;";
 
 //eight colored dots, weaving in and out of sync with each other
 uint16_t mode_juggle(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
 
   SEGMENT.fadeToBlackBy(192 - (3*SEGMENT.intensity/4));
   CRGB fastled_col;
@@ -2089,7 +2089,7 @@ static const char _data_FX_MODE_PALETTE[] PROGMEM = "Palette@Shift,Size,Rotation
 // feel of your fire: COOLING (used in step 1 above) (Speed = COOLING), and SPARKING (used
 // in step 3 above) (Effect Intensity = Sparking).
 uint16_t mode_fire_2012() {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   const unsigned strips = SEGMENT.nrOfVStrips();
   if (!SEGENV.allocateData(strips * SEGLEN)) return mode_static(); //allocation failed
   byte* heat = SEGENV.data;
@@ -2436,7 +2436,7 @@ static const char _data_FX_MODE_METEOR[] PROGMEM = "Meteor@!,Trail,,,,Gradient,,
 
 //Railway Crossing / Christmas Fairy lights
 uint16_t mode_railway() {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned dur = (256 - SEGMENT.speed) * 40;
   uint16_t rampdur = (dur * SEGMENT.intensity) >> 8;
   if (SEGENV.step > dur)
@@ -2727,7 +2727,7 @@ uint16_t mode_halloween_eyes()
     uint32_t blinkEndTime;
   };
 
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   const unsigned maxWidth = strip.isMatrix ? SEG_W : SEGLEN;
   const unsigned HALLOWEEN_EYE_SPACE = MAX(2, strip.isMatrix ? SEG_W>>4: SEGLEN>>5);
   const unsigned HALLOWEEN_EYE_WIDTH = HALLOWEEN_EYE_SPACE/2;
@@ -2912,7 +2912,7 @@ static const char _data_FX_MODE_TRI_STATIC_PATTERN[] PROGMEM = "Solid Pattern Tr
 
 static uint16_t spots_base(uint16_t threshold)
 {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   if (!SEGMENT.check2) SEGMENT.fill(SEGCOLOR(1));
 
   unsigned maxZones = SEGLEN >> 2;
@@ -2968,7 +2968,7 @@ typedef struct Ball {
 *  Bouncing Balls Effect
 */
 uint16_t mode_bouncing_balls(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   //allocate segment data
   const unsigned strips = SEGMENT.nrOfVStrips(); // adapt for 2D
   const size_t maxNumBalls = 16;
@@ -3146,7 +3146,7 @@ static const char _data_FX_MODE_ROLLINGBALLS[] PROGMEM = "Rolling Balls@!,# of b
 * Sinelon stolen from FASTLED examples
 */
 static uint16_t sinelon_base(bool dual, bool rainbow=false) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   SEGMENT.fade_out(SEGMENT.intensity);
   unsigned pos = beatsin16_t(SEGMENT.speed/10,0,SEGLEN-1);
   if (SEGENV.call == 0) SEGENV.aux0 = pos;
@@ -3251,7 +3251,7 @@ typedef struct Spark {
 *  modified from https://github.com/kitesurfer1404/WS2812FX/blob/master/src/custom/Popcorn.h
 */
 uint16_t mode_popcorn(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   //allocate segment data
   unsigned strips = SEGMENT.nrOfVStrips();
   unsigned usablePopcorns = maxNumPopcorn;
@@ -3426,7 +3426,7 @@ typedef struct particle {
 } star;
 
 uint16_t mode_starburst(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned maxData = FAIR_DATA_PER_SEG; //ESP8266: 256 ESP32: 640
   unsigned segs = strip.getActiveSegmentsNum();
   if (segs <= (strip.getMaxSegments() /2)) maxData *= 2; //ESP8266: 512 if <= 8 segs ESP32: 1280 if <= 16 segs
@@ -3545,7 +3545,7 @@ static const char _data_FX_MODE_STARBURST[] PROGMEM = "Fireworks Starburst@Chanc
  */
 uint16_t mode_exploding_fireworks(void)
 {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   const int cols = SEGMENT.is2D() ? SEG_W : 1;
   const int rows = SEGMENT.is2D() ? SEG_H : SEGLEN;
 
@@ -3683,7 +3683,7 @@ static const char _data_FX_MODE_EXPLODING_FIREWORKS[] PROGMEM = "Fireworks 1D@Gr
  */
 uint16_t mode_drip(void)
 {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   //allocate segment data
   unsigned strips = SEGMENT.nrOfVStrips();
   const int maxNumDrops = 4;
@@ -3779,7 +3779,7 @@ typedef struct Tetris {
 } tetris;
 
 uint16_t mode_tetrix(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned strips = SEGMENT.nrOfVStrips(); // allow running on virtual strips (columns in 2D segment)
   unsigned dataSize = sizeof(tetris);
   if (!SEGENV.allocateData(dataSize * strips)) return mode_static(); //allocation failed
@@ -4086,7 +4086,7 @@ static const char _data_FX_MODE_PACIFICA[] PROGMEM = "Pacifica@!,Angle;;!;;pal=5
  * Mode simulates a gradual sunrise
  */
 uint16_t mode_sunrise() {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   //speed 0 - static sun
   //speed 1 - 60: sunrise time in minutes
   //speed 60 - 120 : sunset time in minutes - 60;
@@ -4293,7 +4293,7 @@ static const char _data_FX_MODE_FLOW[] PROGMEM = "Flow@!,Zones;;!;;m12=1"; //ver
  */
 uint16_t mode_chunchun(void)
 {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   SEGMENT.fade_out(254); // add a bit of trail
   unsigned counter = strip.now * (6 + (SEGMENT.speed >> 4));
   unsigned numBirds = 2 + (SEGLEN >> 3);  // 2 + 1/8 of a segment
@@ -4344,7 +4344,7 @@ typedef struct Spotlight {
  */
 uint16_t mode_dancing_shadows(void)
 {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned numSpotlights = map(SEGMENT.intensity, 0, 255, 2, SPOT_MAX_COUNT);  // 49 on 32 segment ESP32, 17 on 16 segment ESP8266
   bool initialize = SEGENV.aux0 != numSpotlights;
   SEGENV.aux0 = numSpotlights;
@@ -4806,7 +4806,7 @@ static const char _data_FX_MODE_AURORA[] PROGMEM = "Aurora@!,!;1,2,3;!;;sx=24,pa
 // 16 bit perlinmove. Use Perlin Noise instead of sinewaves for movement. By Andrew Tuline.
 // Controls are speed, # of pixels, faderate.
 uint16_t mode_perlinmove(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   SEGMENT.fade_out(255-SEGMENT.custom1);
   for (int i = 0; i < SEGMENT.intensity/16 + 1; i++) {
     unsigned locn = inoise16(strip.now*128/(260-SEGMENT.speed)+i*15000, strip.now*128/(260-SEGMENT.speed)); // Get a new pixel location from moving noise.
@@ -4842,7 +4842,7 @@ static const char _data_FX_MODE_WAVESINS[] PROGMEM = "Wavesins@!,Brightness vari
 //////////////////////////////
 // By: ldirko  https://editor.soulmatelights.com/gallery/392-flow-led-stripe , modifed by: Andrew Tuline
 uint16_t mode_FlowStripe(void) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   const int hl = SEGLEN * 10 / 13;
   uint8_t hue = strip.now / (SEGMENT.speed+1);
   uint32_t t = strip.now / (SEGMENT.intensity/8+1);
@@ -6596,7 +6596,7 @@ static const char _data_FX_MODE_MATRIPIX[] PROGMEM = "Matripix@!,Brightness;!,!;
 //   * MIDNOISE     //
 //////////////////////
 uint16_t mode_midnoise(void) {                  // Midnoise. By Andrew Tuline.
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
 // Changing xdist to SEGENV.aux0 and ydist to SEGENV.aux1.
 
   um_data_t *um_data = getAudioData();
@@ -6687,7 +6687,7 @@ static const char _data_FX_MODE_NOISEMETER[] PROGMEM = "Noisemeter@Fade rate,Wid
 //   * PIXELWAVE    //
 //////////////////////
 uint16_t mode_pixelwave(void) {                 // Pixelwave. By Andrew Tuline.
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   // even with 1D effect we have to take logic for 2D segments for allocation as fill_solid() fills whole segment
 
   if (SEGENV.call == 0) {
@@ -6755,7 +6755,7 @@ static const char _data_FX_MODE_PLASMOID[] PROGMEM = "Plasmoid@Phase,# of pixels
 //////////////////////
 // Puddles/Puddlepeak By Andrew Tuline. Merged by @dedehai
 uint16_t mode_puddles_base(bool peakdetect) {
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   unsigned size = 0;
   uint8_t fadeVal = map(SEGMENT.speed, 0, 255, 224, 254);
   unsigned pos = hw_random16(SEGLEN);                          // Set a random starting position.
@@ -6805,7 +6805,7 @@ static const char _data_FX_MODE_PUDDLES[] PROGMEM = "Puddles@Fade rate,Puddle si
 //     * PIXELS     //
 //////////////////////
 uint16_t mode_pixels(void) {                    // Pixels. By Andrew Tuline.
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
 
   if (!SEGENV.allocateData(32*sizeof(uint8_t))) return mode_static(); //allocation failed
   uint8_t *myVals = reinterpret_cast<uint8_t*>(SEGENV.data); // Used to store a pile of samples because WLED frame rate and WLED sample rate are not synchronized. Frame rate is too low.
@@ -6833,7 +6833,7 @@ static const char _data_FX_MODE_PIXELS[] PROGMEM = "Pixels@Fade rate,# of pixels
 //    ** Blurz      //
 //////////////////////
 uint16_t mode_blurz(void) {                    // Blurz. By Andrew Tuline.
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   // even with 1D effect we have to take logic for 2D segments for allocation as fill_solid() fills whole segment
 
   um_data_t *um_data = getAudioData();
@@ -6897,7 +6897,7 @@ static const char _data_FX_MODE_DJLIGHT[] PROGMEM = "DJ Light@Speed;;;01f;m12=2,
 //   ** Freqmap   //
 ////////////////////
 uint16_t mode_freqmap(void) {                   // Map FFT_MajorPeak to SEGLEN. Would be better if a higher framerate.
-  if (SEGLEN == 1) return mode_static();
+  if (SEGLEN <= 1) return mode_static();
   // Start frequency = 60 Hz and log10(60) = 1.78
   // End frequency = MAX_FREQUENCY in Hz and lo10(MAX_FREQUENCY) = MAX_FREQ_LOG10
 
diff --git a/wled00/FX.h b/wled00/FX.h
index fa9ebe1c8f..289896d2df 100644
--- a/wled00/FX.h
+++ b/wled00/FX.h
@@ -79,7 +79,7 @@ extern byte realtimeMode;           // used in getMappedPixelIndex()
     #define MAX_NUM_SEGMENTS  32
   #endif
   #if defined(ARDUINO_ARCH_ESP32S2)
-    #define MAX_SEGMENT_DATA  (MAX_NUM_SEGMENTS*768) // 24k by default (S2 is short on free RAM)
+    #define MAX_SEGMENT_DATA  (MAX_NUM_SEGMENTS*768)  // 24k by default (S2 is short on free RAM)
   #else
     #define MAX_SEGMENT_DATA  (MAX_NUM_SEGMENTS*1280) // 40k by default
   #endif
@@ -518,7 +518,7 @@ typedef struct Segment {
       //if (data) Serial.printf(" %d->(%p)", (int)_dataLen, data);
       //Serial.println();
       #endif
-      if (name) { delete[] name; name = nullptr; }
+      if (name) { free(name); name = nullptr; }
       stopTransition();
       deallocateData();
     }
@@ -534,7 +534,6 @@ typedef struct Segment {
     inline bool     isSelected()         const { return selected; }
     inline bool     isInTransition()     const { return _t != nullptr; }
     inline bool     isActive()           const { return stop > start; }
-    inline bool     is2D()               const { return (width()>1 && height()>1); }
     inline bool     hasRGB()             const { return _isRGB; }
     inline bool     hasWhite()           const { return _hasW; }
     inline bool     isCCT()              const { return _isCCT; }
@@ -599,14 +598,14 @@ typedef struct Segment {
 
     // 1D strip
     [[gnu::hot]] uint16_t virtualLength() const;
-    [[gnu::hot]] void setPixelColor(int n, uint32_t c); // set relative pixel within segment with color
-    inline void setPixelColor(unsigned n, uint32_t c)                    { setPixelColor(int(n), c); }
-    inline void setPixelColor(int n, byte r, byte g, byte b, byte w = 0) { setPixelColor(n, RGBW32(r,g,b,w)); }
-    inline void setPixelColor(int n, CRGB c)                             { setPixelColor(n, RGBW32(c.r,c.g,c.b,0)); }
+    [[gnu::hot]] void setPixelColor(int n, uint32_t c) const; // set relative pixel within segment with color
+    inline void setPixelColor(unsigned n, uint32_t c) const                    { setPixelColor(int(n), c); }
+    inline void setPixelColor(int n, byte r, byte g, byte b, byte w = 0) const { setPixelColor(n, RGBW32(r,g,b,w)); }
+    inline void setPixelColor(int n, CRGB c) const                             { setPixelColor(n, RGBW32(c.r,c.g,c.b,0)); }
     #ifdef WLED_USE_AA_PIXELS
-    void setPixelColor(float i, uint32_t c, bool aa = true);
-    inline void setPixelColor(float i, uint8_t r, uint8_t g, uint8_t b, uint8_t w = 0, bool aa = true) { setPixelColor(i, RGBW32(r,g,b,w), aa); }
-    inline void setPixelColor(float i, CRGB c, bool aa = true)                                         { setPixelColor(i, RGBW32(c.r,c.g,c.b,0), aa); }
+    void setPixelColor(float i, uint32_t c, bool aa = true) const;
+    inline void setPixelColor(float i, uint8_t r, uint8_t g, uint8_t b, uint8_t w = 0, bool aa = true) const { setPixelColor(i, RGBW32(r,g,b,w), aa); }
+    inline void setPixelColor(float i, CRGB c, bool aa = true) const                                         { setPixelColor(i, RGBW32(c.r,c.g,c.b,0), aa); }
     #endif
     [[gnu::hot]] uint32_t getPixelColor(int i) const;
     // 1D support functions (some implement 2D as well)
@@ -642,16 +641,17 @@ typedef struct Segment {
     #endif
     }
   #ifndef WLED_DISABLE_2D
-    [[gnu::hot]] uint16_t XY(int x, int y) const;      // support function to get relative index within segment
+    inline bool is2D() const                                                            { return (width()>1 && height()>1); }
+    [[gnu::hot]] int  XY(int x, int y) const; // support function to get relative index within segment
     [[gnu::hot]] void setPixelColorXY(int x, int y, uint32_t c) const; // set relative pixel within segment with color
     inline void setPixelColorXY(unsigned x, unsigned y, uint32_t c) const               { setPixelColorXY(int(x), int(y), c); }
     inline void setPixelColorXY(int x, int y, byte r, byte g, byte b, byte w = 0) const { setPixelColorXY(x, y, RGBW32(r,g,b,w)); }
     inline void setPixelColorXY(int x, int y, CRGB c) const                             { setPixelColorXY(x, y, RGBW32(c.r,c.g,c.b,0)); }
     inline void setPixelColorXY(unsigned x, unsigned y, CRGB c) const                   { setPixelColorXY(int(x), int(y), RGBW32(c.r,c.g,c.b,0)); }
     #ifdef WLED_USE_AA_PIXELS
-    void setPixelColorXY(float x, float y, uint32_t c, bool aa = true);
-    inline void setPixelColorXY(float x, float y, byte r, byte g, byte b, byte w = 0, bool aa = true) { setPixelColorXY(x, y, RGBW32(r,g,b,w), aa); }
-    inline void setPixelColorXY(float x, float y, CRGB c, bool aa = true)                             { setPixelColorXY(x, y, RGBW32(c.r,c.g,c.b,0), aa); }
+    void setPixelColorXY(float x, float y, uint32_t c, bool aa = true) const;
+    inline void setPixelColorXY(float x, float y, byte r, byte g, byte b, byte w = 0, bool aa = true) const { setPixelColorXY(x, y, RGBW32(r,g,b,w), aa); }
+    inline void setPixelColorXY(float x, float y, CRGB c, bool aa = true) const                             { setPixelColorXY(x, y, RGBW32(c.r,c.g,c.b,0), aa); }
     #endif
     [[gnu::hot]] uint32_t getPixelColorXY(int x, int y) const;
     // 2D support functions
@@ -678,7 +678,8 @@ typedef struct Segment {
     void wu_pixel(uint32_t x, uint32_t y, CRGB c);
     inline void fill_solid(CRGB c) { fill(RGBW32(c.r,c.g,c.b,0)); }
   #else
-    inline uint16_t XY(int x, int y)                                              { return x; }
+    inline constexpr bool is2D() const                                            { return false; }
+    inline int  XY(int x, int y) const                                            { return x; }
     inline void setPixelColorXY(int x, int y, uint32_t c)                         { setPixelColor(x, c); }
     inline void setPixelColorXY(unsigned x, unsigned y, uint32_t c)               { setPixelColor(int(x), c); }
     inline void setPixelColorXY(int x, int y, byte r, byte g, byte b, byte w = 0) { setPixelColor(x, RGBW32(r,g,b,w)); }
@@ -778,7 +779,7 @@ class WS2812FX {  // 96 bytes
     }
 
     ~WS2812FX() {
-      if (customMappingTable) delete[] customMappingTable;
+      if (customMappingTable) free(customMappingTable);
       _mode.clear();
       _modeData.clear();
       _segments.clear();
@@ -804,7 +805,7 @@ class WS2812FX {  // 96 bytes
       resetSegments(),                            // marks all segments for reset
       makeAutoSegments(bool forceReset = false),  // will create segments based on configured outputs
       fixInvalidSegments(),                       // fixes incorrect segment configuration
-      setPixelColor(unsigned n, uint32_t c),      // paints absolute strip pixel with index n and color c
+      setPixelColor(unsigned n, uint32_t c) const,      // paints absolute strip pixel with index n and color c
       show(),                                     // initiates LED output
       setTargetFps(unsigned fps),
       setupEffectData();                          // add default effects to the list; defined in FX.cpp
@@ -812,9 +813,9 @@ class WS2812FX {  // 96 bytes
     inline void resetTimebase()           { timebase = 0UL - millis(); }
     inline void restartRuntime()          { for (Segment &seg : _segments) { seg.markForReset().resetIfRequired(); } }
     inline void setTransitionMode(bool t) { for (Segment &seg : _segments) seg.startTransition(t ? _transitionDur : 0); }
-    inline void setPixelColor(unsigned n, uint8_t r, uint8_t g, uint8_t b, uint8_t w = 0) { setPixelColor(n, RGBW32(r,g,b,w)); }
-    inline void setPixelColor(unsigned n, CRGB c)                                         { setPixelColor(n, c.red, c.green, c.blue); }
-    inline void fill(uint32_t c)          { for (unsigned i = 0; i < getLengthTotal(); i++) setPixelColor(i, c); } // fill whole strip with color (inline)
+    inline void setPixelColor(unsigned n, uint8_t r, uint8_t g, uint8_t b, uint8_t w = 0) const { setPixelColor(n, RGBW32(r,g,b,w)); }
+    inline void setPixelColor(unsigned n, CRGB c) const                                         { setPixelColor(n, c.red, c.green, c.blue); }
+    inline void fill(uint32_t c) const    { for (unsigned i = 0; i < getLengthTotal(); i++) setPixelColor(i, c); } // fill whole strip with color (inline)
     inline void trigger()                                     { _triggered = true; }  // Forces the next frame to be computed on all active segments.
     inline void setShowCallback(show_callback cb)             { _callback = cb; }
     inline void setTransition(uint16_t t)                     { _transitionDur = t; } // sets transition time (in ms)
@@ -824,7 +825,7 @@ class WS2812FX {  // 96 bytes
 
     bool
       paletteFade,
-      checkSegmentAlignment(),
+      checkSegmentAlignment() const,
       hasRGBWBus() const,
       hasCCTBus() const,
       deserializeMap(unsigned n = 0);
@@ -918,11 +919,11 @@ class WS2812FX {  // 96 bytes
     void setUpMatrix();     // sets up automatic matrix ledmap from panel configuration
 
     // outsmart the compiler :) by correctly overloading
-    inline void setPixelColorXY(int x, int y, uint32_t c)   { setPixelColor((unsigned)(y * Segment::maxWidth + x), c); }
-    inline void setPixelColorXY(int x, int y, byte r, byte g, byte b, byte w = 0) { setPixelColorXY(x, y, RGBW32(r,g,b,w)); }
-    inline void setPixelColorXY(int x, int y, CRGB c)       { setPixelColorXY(x, y, RGBW32(c.r,c.g,c.b,0)); }
+    inline void setPixelColorXY(int x, int y, uint32_t c) const { setPixelColor((unsigned)(y * Segment::maxWidth + x), c); }
+    inline void setPixelColorXY(int x, int y, byte r, byte g, byte b, byte w = 0) const { setPixelColorXY(x, y, RGBW32(r,g,b,w)); }
+    inline void setPixelColorXY(int x, int y, CRGB c) const     { setPixelColorXY(x, y, RGBW32(c.r,c.g,c.b,0)); }
 
-    inline uint32_t getPixelColorXY(int x, int y) const     { return getPixelColor(isMatrix ? y * Segment::maxWidth + x : x); }
+    inline uint32_t getPixelColorXY(int x, int y) const         { return getPixelColor(isMatrix ? y * Segment::maxWidth + x : x); }
 
   // end 2D support
 
diff --git a/wled00/FX_2Dfcn.cpp b/wled00/FX_2Dfcn.cpp
index a72cfde290..ffaf53bb7f 100644
--- a/wled00/FX_2Dfcn.cpp
+++ b/wled00/FX_2Dfcn.cpp
@@ -50,8 +50,8 @@ void WS2812FX::setUpMatrix() {
 
     customMappingSize = 0; // prevent use of mapping if anything goes wrong
 
-    if (customMappingTable) delete[] customMappingTable;
-    customMappingTable = new(std::nothrow) uint16_t[getLengthTotal()];
+    if (customMappingTable) free(customMappingTable);
+    customMappingTable = static_cast<uint16_t*>(malloc(sizeof(uint16_t)*getLengthTotal()));
 
     if (customMappingTable) {
       customMappingSize = getLengthTotal();
@@ -68,7 +68,7 @@ void WS2812FX::setUpMatrix() {
       // content of the file is just raw JSON array in the form of [val1,val2,val3,...]
       // there are no other "key":"value" pairs in it
       // allowed values are: -1 (missing pixel/no LED attached), 0 (inactive/unused pixel), 1 (active/used pixel)
-      char    fileName[32]; strcpy_P(fileName, PSTR("/2d-gaps.json")); // reduce flash footprint
+      char    fileName[32]; strcpy_P(fileName, PSTR("/2d-gaps.json"));
       bool    isFile = WLED_FS.exists(fileName);
       size_t  gapSize = 0;
       int8_t *gapTable = nullptr;
@@ -85,7 +85,7 @@ void WS2812FX::setUpMatrix() {
           JsonArray map = pDoc->as<JsonArray>();
           gapSize = map.size();
           if (!map.isNull() && gapSize >= matrixSize) { // not an empty map
-            gapTable = new(std::nothrow) int8_t[gapSize];
+            gapTable = static_cast<int8_t*>(malloc(gapSize));
             if (gapTable) for (size_t i = 0; i < gapSize; i++) {
               gapTable[i] = constrain(map[i], -1, 1);
             }
@@ -113,7 +113,7 @@ void WS2812FX::setUpMatrix() {
       }
 
       // delete gap array as we no longer need it
-      if (gapTable) delete[] gapTable;
+      if (gapTable) free(gapTable);
 
       #ifdef WLED_DEBUG
       DEBUG_PRINT(F("Matrix ledmap:"));
@@ -146,7 +146,7 @@ void WS2812FX::setUpMatrix() {
 #ifndef WLED_DISABLE_2D
 
 // XY(x,y) - gets pixel index within current segment (often used to reference leds[] array element)
-uint16_t IRAM_ATTR_YN Segment::XY(int x, int y) const
+int IRAM_ATTR_YN Segment::XY(int x, int y) const
 {
   const int vW = vWidth();   // segment width in logical pixels (can be 0 if segment is inactive)
   const int vH = vHeight();  // segment height in logical pixels (is always >= 1)
@@ -215,7 +215,7 @@ void IRAM_ATTR_YN Segment::setPixelColorXY(int x, int y, uint32_t col) const
 
 #ifdef WLED_USE_AA_PIXELS
 // anti-aliased version of setPixelColorXY()
-void Segment::setPixelColorXY(float x, float y, uint32_t col, bool aa)
+void Segment::setPixelColorXY(float x, float y, uint32_t col, bool aa) const
 {
   if (!isActive()) return; // not active
   if (x<0.0f || x>1.0f || y<0.0f || y>1.0f) return; // not normalized
diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index bd0ece1688..433c828a78 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -94,7 +94,7 @@ Segment::Segment(const Segment &orig) {
   name = nullptr;
   data = nullptr;
   _dataLen = 0;
-  if (orig.name) { name = new(std::nothrow) char[strlen(orig.name)+1]; if (name) strcpy(name, orig.name); }
+  if (orig.name) { name = static_cast<char*>(malloc(strlen(orig.name)+1)); if (name) strcpy(name, orig.name); }
   if (orig.data) { if (allocateData(orig._dataLen)) memcpy(data, orig.data, orig._dataLen); }
 }
 
@@ -113,7 +113,7 @@ Segment& Segment::operator= (const Segment &orig) {
   //DEBUG_PRINTF_P(PSTR("-- Copying segment: %p -> %p\n"), &orig, this);
   if (this != &orig) {
     // clean destination
-    if (name) { delete[] name; name = nullptr; }
+    if (name) { free(name); name = nullptr; }
     stopTransition();
     deallocateData();
     // copy source
@@ -122,7 +122,7 @@ Segment& Segment::operator= (const Segment &orig) {
     data = nullptr;
     _dataLen = 0;
     // copy source data
-    if (orig.name) { name = new(std::nothrow) char[strlen(orig.name)+1]; if (name) strcpy(name, orig.name); }
+    if (orig.name) { name = static_cast<char*>(malloc(strlen(orig.name)+1)); if (name) strcpy(name, orig.name); }
     if (orig.data) { if (allocateData(orig._dataLen)) memcpy(data, orig.data, orig._dataLen); }
   }
   return *this;
@@ -132,7 +132,7 @@ Segment& Segment::operator= (const Segment &orig) {
 Segment& Segment::operator= (Segment &&orig) noexcept {
   //DEBUG_PRINTF_P(PSTR("-- Moving segment: %p -> %p\n"), &orig, this);
   if (this != &orig) {
-    if (name) { delete[] name; name = nullptr; } // free old name
+    if (name) { free(name); name = nullptr; } // free old name
     stopTransition();
     deallocateData(); // free old runtime data
     memcpy((void*)this, (void*)&orig, sizeof(Segment));
@@ -869,7 +869,7 @@ void IRAM_ATTR_YN Segment::setPixelColor(int i, uint32_t col)
 
 #ifdef WLED_USE_AA_PIXELS
 // anti-aliased normalized version of setPixelColor()
-void Segment::setPixelColor(float i, uint32_t col, bool aa)
+void Segment::setPixelColor(float i, uint32_t col, bool aa) const
 {
   if (!isActive()) return; // not active
   int vStrip = int(i/10.0f); // hack to allow running on virtual strips (2D segment columns/rows)
@@ -1413,7 +1413,7 @@ void WS2812FX::service() {
   #endif
 }
 
-void IRAM_ATTR WS2812FX::setPixelColor(unsigned i, uint32_t col) {
+void IRAM_ATTR WS2812FX::setPixelColor(unsigned i, uint32_t col) const {
   i = getMappedPixelIndex(i);
   if (i >= _length) return;
   BusManager::setPixelColor(i, col);
@@ -1694,9 +1694,9 @@ void WS2812FX::fixInvalidSegments() {
 
 //true if all segments align with a bus, or if a segment covers the total length
 //irrelevant in 2D set-up
-bool WS2812FX::checkSegmentAlignment() {
+bool WS2812FX::checkSegmentAlignment() const {
   bool aligned = false;
-  for (segment &seg : _segments) {
+  for (const segment &seg : _segments) {
     for (unsigned b = 0; b<BusManager::getNumBusses(); b++) {
       Bus *bus = BusManager::getBus(b);
       if (seg.start == bus->getStart() && seg.stop == bus->getStart() + bus->getLength()) aligned = true;
@@ -1808,8 +1808,8 @@ bool WS2812FX::deserializeMap(unsigned n) {
     Segment::maxHeight = min(max(root[F("height")].as<int>(), 1), 128);
   }
 
-  if (customMappingTable) delete[] customMappingTable;
-  customMappingTable = new(std::nothrow) uint16_t[getLengthTotal()];
+  if (customMappingTable) free(customMappingTable);
+  customMappingTable = static_cast<uint16_t*>(malloc(sizeof(uint16_t)*getLengthTotal()));
 
   if (customMappingTable) {
     DEBUG_PRINT(F("Reading LED map from ")); DEBUG_PRINTLN(fileName);
diff --git a/wled00/fcn_declare.h b/wled00/fcn_declare.h
index c089f08f4b..6b896f482c 100644
--- a/wled00/fcn_declare.h
+++ b/wled00/fcn_declare.h
@@ -161,11 +161,11 @@ class NeoGammaWLEDMethod {
 };
 #define gamma32(c) NeoGammaWLEDMethod::Correct32(c)
 #define gamma8(c)  NeoGammaWLEDMethod::rawGamma8(c)
-[[gnu::hot]] uint32_t color_blend(uint32_t c1, uint32_t c2 , uint8_t blend);
+[[gnu::hot, gnu::pure]] uint32_t color_blend(uint32_t c1, uint32_t c2 , uint8_t blend);
 inline uint32_t color_blend16(uint32_t c1, uint32_t c2, uint16_t b) { return color_blend(c1, c2, b >> 8); };
-[[gnu::hot]] uint32_t color_add(uint32_t, uint32_t, bool preserveCR = false);
-[[gnu::hot]] uint32_t color_fade(uint32_t c1, uint8_t amount, bool video=false);
-[[gnu::hot]] uint32_t ColorFromPaletteWLED(const CRGBPalette16 &pal, unsigned index, uint8_t brightness = (uint8_t)255U, TBlendType blendType = LINEARBLEND);
+[[gnu::hot, gnu::pure]] uint32_t color_add(uint32_t, uint32_t, bool preserveCR = false);
+[[gnu::hot, gnu::pure]] uint32_t color_fade(uint32_t c1, uint8_t amount, bool video=false);
+[[gnu::hot, gnu::pure]] uint32_t ColorFromPaletteWLED(const CRGBPalette16 &pal, unsigned index, uint8_t brightness = (uint8_t)255U, TBlendType blendType = LINEARBLEND);
 CRGBPalette16 generateHarmonicRandomPalette(const CRGBPalette16 &basepalette);
 CRGBPalette16 generateRandomPalette();
 inline uint32_t colorFromRgbw(byte* rgbw) { return uint32_t((byte(rgbw[3]) << 24) | (byte(rgbw[0]) << 16) | (byte(rgbw[1]) << 8) | (byte(rgbw[2]))); }
@@ -176,7 +176,7 @@ inline CHSV rgb2hsv(const CRGB c) { CHSV32 hsv; rgb2hsv((uint32_t((byte(c.r) <<
 void colorKtoRGB(uint16_t kelvin, byte* rgb);
 void colorCTtoRGB(uint16_t mired, byte* rgb); //white spectrum to rgb
 void colorXYtoRGB(float x, float y, byte* rgb); // only defined if huesync disabled TODO
-void colorRGBtoXY(byte* rgb, float* xy); // only defined if huesync disabled TODO
+void colorRGBtoXY(const byte* rgb, float* xy); // only defined if huesync disabled TODO
 void colorFromDecOrHexString(byte* rgb, const char* in);
 bool colorFromHexString(byte* rgb, const char* in);
 uint32_t colorBalanceFromKelvin(uint16_t kelvin, uint32_t rgb);
@@ -464,10 +464,10 @@ void userLoop();
 #include "soc/wdev_reg.h"
 #define HW_RND_REGISTER REG_READ(WDEV_RND_REG)
 #endif
-int getNumVal(const String* req, uint16_t pos);
+[[gnu::pure]] int getNumVal(const String* req, uint16_t pos);
 void parseNumber(const char* str, byte* val, byte minv=0, byte maxv=255);
-bool getVal(JsonVariant elem, byte* val, byte minv=0, byte maxv=255); // getVal supports inc/decrementing and random ("X~Y(r|~[w][-][Z])" form)
-bool getBoolVal(JsonVariant elem, bool dflt);
+bool getVal(JsonVariant elem, byte* val, byte minv=0, byte maxv=255); // getVal supports inc/decrementing and random ("X~Y(r|[w]~[-][Z])" form)
+[[gnu::pure]] bool getBoolVal(const JsonVariant &elem, bool dflt);
 bool updateVal(const char* req, const char* key, byte* val, byte minv=0, byte maxv=255);
 size_t printSetFormCheckbox(Print& settingsScript, const char* key, int val);
 size_t printSetFormValue(Print& settingsScript, const char* key, int val);
@@ -475,7 +475,7 @@ size_t printSetFormValue(Print& settingsScript, const char* key, const char* val
 size_t printSetFormIndex(Print& settingsScript, const char* key, int index);
 size_t printSetClassElementHTML(Print& settingsScript, const char* key, const int index, const char* val);
 void prepareHostname(char* hostname);
-bool isAsterisksOnly(const char* str, byte maxLen);
+[[gnu::pure]] bool isAsterisksOnly(const char* str, byte maxLen);
 bool requestJSONBufferLock(uint8_t moduleID=255);
 void releaseJSONBufferLock();
 uint8_t extractModeName(uint8_t mode, const char *src, char *dest, uint8_t maxLen);
@@ -488,8 +488,8 @@ uint16_t beatsin16_t(accum88 beats_per_minute, uint16_t lowest = 0, uint16_t hig
 uint8_t beatsin8_t(accum88 beats_per_minute, uint8_t lowest = 0, uint8_t highest = 255, uint32_t timebase = 0, uint8_t phase_offset = 0);
 um_data_t* simulateSound(uint8_t simulationId);
 void enumerateLedmaps();
-uint8_t get_random_wheel_index(uint8_t pos);
-float mapf(float x, float in_min, float in_max, float out_min, float out_max);
+[[gnu::hot]] uint8_t get_random_wheel_index(uint8_t pos);
+[[gnu::hot, gnu::pure]] float mapf(float x, float in_min, float in_max, float out_min, float out_max);
 
 // fast (true) random numbers using hardware RNG, all functions return values in the range lowerlimit to upperlimit-1
 // note: for true random numbers with high entropy, do not call faster than every 200ns (5MHz)
diff --git a/wled00/file.cpp b/wled00/file.cpp
index c48a300b7f..46df8d380c 100644
--- a/wled00/file.cpp
+++ b/wled00/file.cpp
@@ -176,7 +176,7 @@ static void writeSpace(size_t l)
   if (knownLargestSpace < l) knownLargestSpace = l;
 }
 
-bool appendObjectToFile(const char* key, const JsonDocument* content, uint32_t s, uint32_t contentLen = 0)
+static bool appendObjectToFile(const char* key, const JsonDocument* content, uint32_t s, uint32_t contentLen = 0)
 {
   #ifdef WLED_DEBUG_FS
     DEBUGFS_PRINTLN(F("Append"));
diff --git a/wled00/json.cpp b/wled00/json.cpp
index ad0e96ed90..c63da08546 100644
--- a/wled00/json.cpp
+++ b/wled00/json.cpp
@@ -68,7 +68,7 @@ bool deserializeSegment(JsonObject elem, byte it, byte presetId)
   if (elem["n"]) {
     // name field exists
     if (seg.name) { //clear old name
-      delete[] seg.name;
+      free(seg.name);
       seg.name = nullptr;
     }
 
@@ -77,7 +77,7 @@ bool deserializeSegment(JsonObject elem, byte it, byte presetId)
     if (name != nullptr) len = strlen(name);
     if (len > 0) {
       if (len > WLED_MAX_SEGNAME_LEN) len = WLED_MAX_SEGNAME_LEN;
-      seg.name = new(std::nothrow) char[len+1];
+      seg.name = static_cast<char*>(malloc(len+1));
       if (seg.name) strlcpy(seg.name, name, WLED_MAX_SEGNAME_LEN+1);
     } else {
       // but is empty (already deleted above)
@@ -86,7 +86,7 @@ bool deserializeSegment(JsonObject elem, byte it, byte presetId)
   } else if (start != seg.start || stop != seg.stop) {
     // clearing or setting segment without name field
     if (seg.name) {
-      delete[] seg.name;
+      free(seg.name);
       seg.name = nullptr;
     }
   }
diff --git a/wled00/mqtt.cpp b/wled00/mqtt.cpp
index a476db87a7..925e075552 100644
--- a/wled00/mqtt.cpp
+++ b/wled00/mqtt.cpp
@@ -64,8 +64,8 @@ static void onMqttMessage(char* topic, char* payload, AsyncMqttClientMessageProp
   }
 
   if (index == 0) {                       // start (1st partial packet or the only packet)
-    if (payloadStr) delete[] payloadStr;  // fail-safe: release buffer
-    payloadStr = new char[total+1];       // allocate new buffer
+    if (payloadStr) free(payloadStr);     // fail-safe: release buffer
+    payloadStr = static_cast<char*>(malloc(total+1)); // allocate new buffer
   }
   if (payloadStr == nullptr) return;      // buffer not allocated
 
@@ -90,7 +90,7 @@ static void onMqttMessage(char* topic, char* payload, AsyncMqttClientMessageProp
     } else {
       // Non-Wled Topic used here. Probably a usermod subscribed to this topic.
       UsermodManager::onMqttMessage(topic, payloadStr);
-      delete[] payloadStr;
+      free(payloadStr);
       payloadStr = nullptr;
       return;
     }
@@ -120,7 +120,7 @@ static void onMqttMessage(char* topic, char* payload, AsyncMqttClientMessageProp
     // topmost topic (just wled/MAC)
     parseMQTTBriPayload(payloadStr);
   }
-  delete[] payloadStr;
+  free(payloadStr);
   payloadStr = nullptr;
 }
 
diff --git a/wled00/presets.cpp b/wled00/presets.cpp
index 4aaa121f45..15eed3e466 100644
--- a/wled00/presets.cpp
+++ b/wled00/presets.cpp
@@ -76,8 +76,8 @@ static void doSaveState() {
   // clean up
   saveLedmap   = -1;
   presetToSave = 0;
-  delete[] saveName;
-  delete[] quickLoad;
+  free(saveName);
+  free(quickLoad);
   saveName = nullptr;
   quickLoad = nullptr;
   playlistSave = false;
@@ -216,8 +216,8 @@ void handlePresets()
 //called from handleSet(PS=) [network callback (sObj is empty), IR (irrational), deserializeState, UDP] and deserializeState() [network callback (filedoc!=nullptr)]
 void savePreset(byte index, const char* pname, JsonObject sObj)
 {
-  if (!saveName) saveName = new(std::nothrow) char[33];
-  if (!quickLoad) quickLoad = new(std::nothrow) char[9];
+  if (!saveName) saveName = static_cast<char*>(malloc(33));
+  if (!quickLoad) quickLoad = static_cast<char*>(malloc(9));
   if (!saveName || !quickLoad) return;
 
   if (index == 0 || (index > 250 && index < 255)) return;
@@ -263,8 +263,8 @@ void savePreset(byte index, const char* pname, JsonObject sObj)
         presetsModifiedTime = toki.second(); //unix time
         updateFSInfo();
       }
-      delete[] saveName;
-      delete[] quickLoad;
+      free(saveName);
+      free(quickLoad);
       saveName = nullptr;
       quickLoad = nullptr;
     } else {
diff --git a/wled00/set.cpp b/wled00/set.cpp
index 5652c6c60a..6fc3292779 100644
--- a/wled00/set.cpp
+++ b/wled00/set.cpp
@@ -209,7 +209,7 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
       // actual finalization is done in WLED::loop() (removing old busses and adding new)
       // this may happen even before this loop is finished so we do "doInitBusses" after the loop
       if (busConfigs[s] != nullptr) delete busConfigs[s];
-      busConfigs[s] = new BusConfig(type, pins, start, length, colorOrder | (channelSwap<<4), request->hasArg(cv), skip, awmode, freq, useGlobalLedBuffer, maPerLed, maMax);
+      busConfigs[s] = new(std::nothrow) BusConfig(type, pins, start, length, colorOrder | (channelSwap<<4), request->hasArg(cv), skip, awmode, freq, useGlobalLedBuffer, maPerLed, maMax);
       busesChanged = true;
     }
     //doInitBusses = busesChanged; // we will do that below to ensure all input data is processed
diff --git a/wled00/udp.cpp b/wled00/udp.cpp
index 8ca4581baa..e993150d1c 100644
--- a/wled00/udp.cpp
+++ b/wled00/udp.cpp
@@ -206,7 +206,7 @@ void notify(byte callMode, bool followUp)
   notificationCount = followUp ? notificationCount + 1 : 0;
 }
 
-void parseNotifyPacket(const uint8_t *udpIn) {
+static void parseNotifyPacket(const uint8_t *udpIn) {
   //ignore notification if received within a second after sending a notification ourselves
   if (millis() - notificationSentTime < 1000) return;
   if (udpIn[1] > 199) return; //do not receive custom versions
diff --git a/wled00/util.cpp b/wled00/util.cpp
index e15247f9f0..ed38ae180b 100644
--- a/wled00/util.cpp
+++ b/wled00/util.cpp
@@ -73,7 +73,7 @@ bool getVal(JsonVariant elem, byte* val, byte vmin, byte vmax) {
 }
 
 
-bool getBoolVal(JsonVariant elem, bool dflt) {
+bool getBoolVal(const JsonVariant &elem, bool dflt) {
   if (elem.is<const char*>() && elem.as<const char*>()[0] == 't') {
     return !dflt;
   } else {
@@ -538,7 +538,7 @@ void enumerateLedmaps() {
 
     #ifndef ESP8266
     if (ledmapNames[i-1]) { //clear old name
-      delete[] ledmapNames[i-1];
+      free(ledmapNames[i-1]);
       ledmapNames[i-1] = nullptr;
     }
     #endif
@@ -556,7 +556,7 @@ void enumerateLedmaps() {
             const char *name = root["n"].as<const char*>();
             if (name != nullptr) len = strlen(name);
             if (len > 0 && len < 33) {
-              ledmapNames[i-1] = new char[len+1];
+              ledmapNames[i-1] = static_cast<char*>(malloc(len+1));
               if (ledmapNames[i-1]) strlcpy(ledmapNames[i-1], name, 33);
             }
           }
@@ -564,7 +564,7 @@ void enumerateLedmaps() {
             char tmp[33];
             snprintf_P(tmp, 32, s_ledmap_tmpl, i);
             len = strlen(tmp);
-            ledmapNames[i-1] = new char[len+1];
+            ledmapNames[i-1] = static_cast<char*>(malloc(len+1));
             if (ledmapNames[i-1]) strlcpy(ledmapNames[i-1], tmp, 33);
           }
         }