Try out SkTree in nanobench.

bench/SKPBench.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SKPBench.h"
 #include "SkCommandLineFlags.h"
 
-DECLARE_int32(benchTile);
+DEFINE_int32(benchTile, 256, "Tile dimension used for SKP playback.");
 
 SKPBench::SKPBench(const char* name, const SkPicture* pic, const SkIRect& clip, SkScalar scale)
     : fPic(SkRef(pic))
     , fClip(clip)
     , fScale(scale)
     , fName(name) {
     fUniqueName.printf("%s_%.2g", name, scale);  // Scale makes this unqiue for skiaperf.com traces.
 }
 
 const char* SKPBench::onGetName() {
@@ skipping 24 matching lines @@
             for (int x = bounds.fLeft; x < bounds.fRight; x += FLAGS_benchTile) {
                 SkAutoCanvasRestore perTile(canvas, true/*save now*/);
                 canvas->clipRect(SkRect::Make(
                             SkIRect::MakeXYWH(x, y, FLAGS_benchTile, FLAGS_benchTile)));
                 fPic->playback(canvas);
             }
         }
         canvas->flush();
     }
 }