Optimize CSS box-shadow performance

src/core/SkScaledImageCache.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkChecksum.h"
 #include "SkScaledImageCache.h"
 #include "SkMipMap.h"
 #include "SkPixelRef.h"
-#include "SkRect.h"

[reed1, 2014/08/25 11:58:42]

nit: we can land this change separately.

[qiankun, 2014/08/26 08:36:33]

Done.

 
 // This can be defined by the caller's build system
 //#define SK_USE_DISCARDABLE_SCALEDIMAGECACHE
 
 #ifndef SK_DISCARDABLEMEMORY_SCALEDIMAGECACHE_COUNT_LIMIT
 #   define SK_DISCARDABLEMEMORY_SCALEDIMAGECACHE_COUNT_LIMIT   1024
 #endif
 
 #ifndef SK_DEFAULT_IMAGE_CACHE_LIMIT
     #define SK_DEFAULT_IMAGE_CACHE_LIMIT     (2 * 1024 * 1024)
@@ skipping 67 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
 // experimental hash to speed things up
 #define USE_HASH
 
 #if !defined(USE_HASH)
 static inline SkScaledImageCache::Rec* find_rec_in_list(
         SkScaledImageCache::Rec* head, const Key & key) {
     SkScaledImageCache::Rec* rec = head;
-    while ((rec != NULL) && (rec->fKey != key)) {
+    while ((rec != NULL) && (*rec->fKey != key)) {
         rec = rec->fNext;
     }
     return rec;
 }
 #endif
 
 void SkScaledImageCache::init() {
     fHead = NULL;
     fTail = NULL;
 #ifdef USE_HASH
@@ skipping 544 matching lines @@
 }
 
 size_t SkGraphics::GetImageCacheSingleAllocationByteLimit() {
     return SkScaledImageCache::GetSingleAllocationByteLimit();
 }
 
 size_t SkGraphics::SetImageCacheSingleAllocationByteLimit(size_t newLimit) {
     return SkScaledImageCache::SetSingleAllocationByteLimit(newLimit);
 }