Track how much measure cache entries are used

Summary: @public Adds the maximum number of measure cache entries in use to the metrics for `YGMarkerLayout` Reviewed By: SidharthGuglani Differential Revision: D13844731 fbshipit-source-id: fa66dbf1b7a1799494f72ecc17dfaef04d0b56e4
CodeWitchBella · Jan 29, 2019 · 9adc3b4 · 9adc3b4
1 parent c7a6980
commit 9adc3b4
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diff --git a/YGMarker.h b/YGMarker.h
@@ -20,6 +20,7 @@ typedef YG_ENUM_BEGIN(YGMarker){
 typedef struct {
   int layouts;
   int measures;
+  int maxMeasureCache;
   int cachedLayouts;
   int cachedMeasures;
 } YGMarkerLayoutData;

diff --git a/Yoga.cpp b/Yoga.cpp
@@ -3889,6 +3889,11 @@ bool YGLayoutNodeInternal(
     layout->lastOwnerDirection = ownerDirection;
 
     if (cachedResults == nullptr) {
+      if (layout->nextCachedMeasurementsIndex + 1 >
+          (uint32_t) layoutMarkerData.maxMeasureCache) {
+        layoutMarkerData.maxMeasureCache =
+            layout->nextCachedMeasurementsIndex + 1;
+      }
       if (layout->nextCachedMeasurementsIndex == YG_MAX_CACHED_RESULT_COUNT) {
         if (gPrintChanges) {
           YGLog(node, YGLogLevelVerbose, "Out of cache entries!\n");