Histogram the time we spend resampling images. We suspect this may be causing...

skia/ext/image_operations.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 #define _USE_MATH_DEFINES
 #include <cmath>
 #include <limits>
 #include <vector>
 
 #include "skia/ext/image_operations.h"
 
 #include "base/gfx/rect.h"
 #include "base/gfx/size.h"
+#include "base/histogram.h"
 #include "base/logging.h"
 #include "base/stack_container.h"
+#include "base/time.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColorPriv.h"
 #include "skia/ext/convolver.h"
 
 namespace skia {
 
 // TODO(brettw) remove this and put this file in the skia namespace.
 using namespace gfx;
 
 namespace {
@@ skipping 227 matching lines @@
 
 }  // namespace
 
 // Resize ----------------------------------------------------------------------
 
 // static
 SkBitmap ImageOperations::Resize(const SkBitmap& source,
                                  ResizeMethod method,
                                  int dest_width, int dest_height,
                                  const gfx::Rect& dest_subset) {
+  // Time how long this takes to see if it's a problem for users.
+  base::TimeTicks resize_start = base::TimeTicks::Now();
+
   DCHECK(gfx::Rect(dest_width, dest_height).Contains(dest_subset)) <<
       "The supplied subset does not fall within the destination image.";
 
   // If the size of source or destination is 0, i.e. 0x0, 0xN or Nx0, just
   // return empty.
   if (source.width() < 1 || source.height() < 1 ||
       dest_width < 1 || dest_height < 1)
     return SkBitmap();
 
   SkAutoLockPixels locker(source);
@@ skipping 12 matching lines @@
   result.setConfig(SkBitmap::kARGB_8888_Config,
                    dest_subset.width(), dest_subset.height());
   result.allocPixels();
   BGRAConvolve2D(source_subset, static_cast<int>(source.rowBytes()),
                  !source.isOpaque(), filter.x_filter(), filter.y_filter(),
                  static_cast<unsigned char*>(result.getPixels()));
 
   // Preserve the "opaque" flag for use as an optimization later.
   result.setIsOpaque(source.isOpaque());
 
+  base::TimeDelta delta = base::TimeTicks::Now() - resize_start;
+  UMA_HISTOGRAM_TIMES("Image.ResampleMS", delta);
+
   return result;
 }
 
 // static
 SkBitmap ImageOperations::Resize(const SkBitmap& source,
                                  ResizeMethod method,
                                  int dest_width, int dest_height) {
   gfx::Rect dest_subset(0, 0, dest_width, dest_height);
   return Resize(source, method, dest_width, dest_height, dest_subset);
 }
@@ skipping 253 matching lines @@
 
       dst_row[x] = source_row[x_pix];
     }
   }
 
   return cropped;
 }
 
 }  // namespace skia