cache SEGMENT

actually its just a minor speedup, at least with -O2

wled00/FX.cpp

@@ -10,6 +10,13 @@
 #include "FX.h"
 #include "fcn_declare.h"
 
+#ifdef WLEDMM_FASTPATH
+#undef SEGMENT
+#undef SEGENV
+#define SEGMENT (*strip._currentSeg) // saves us many calls to strip._segments[strip.getCurrSegmentId()]
+#define SEGENV SEGMENT
+#endif
+
 #define IBN 5100
 
 // paletteBlend: 0 - wrap when moving, 1 - always wrap, 2 - never wrap, 3 - none (undefined)

wled00/FX.h

@@ -1056,6 +1056,9 @@ class WS2812FX {  // 96 bytes
     // and color transitions
     uint32_t _colors_t[3]; // color used for effect (includes transition)
     uint16_t _virtualSegmentLength;
+#ifdef WLEDMM_FASTPATH
+    segment* _currentSeg = nullptr;  // WLEDMM speed up SEGMENT access
+#endif
 
     std::vector<segment> _segments;
     friend class Segment;

wled00/FX_fcn.cpp

@@ -1884,6 +1884,9 @@ void WS2812FX::service() {
   _isServicing = true;
   _segment_index = 0;
   for (segment &seg : _segments) {
+#ifdef WLEDMM_FASTPATH
+    _currentSeg = &seg;
+#endif
     // reset the segment runtime data if needed
     seg.resetIfRequired();