[PATCH] D31989: Avoid calling SizeClassMap::MaxCachedHint on hot path, it's not free.

[Aleksey Shlyapnikov via Phabricator via llvm-commits]

alekseyshl created this revision.
Herald added a subscriber: kubamracek.

Remove unecessary SizeClassMap::MaxCachedHint call.


https://reviews.llvm.org/D31989

Files:
  lib/sanitizer_common/sanitizer_allocator_local_cache.h


Index: lib/sanitizer_common/sanitizer_allocator_local_cache.h
===================================================================
--- lib/sanitizer_common/sanitizer_allocator_local_cache.h
+++ lib/sanitizer_common/sanitizer_allocator_local_cache.h
@@ -102,7 +102,7 @@
   NOINLINE void Refill(PerClass *c, SizeClassAllocator *allocator,
                        uptr class_id) {
     InitCache();
-    uptr num_requested_chunks = SizeClassMap::MaxCachedHint(class_id);
+    uptr num_requested_chunks = c->max_count / 2;
     allocator->GetFromAllocator(&stats_, class_id, c->chunks,
                                 num_requested_chunks);
     c->count = num_requested_chunks;


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