key_mobile_sites_smooth: Reload pages before scrolling for LinkedIn and Wowwiki

tools/perf/benchmarks/smoothness.py

Index: tools/perf/benchmarks/smoothness.py
diff --git a/tools/perf/benchmarks/smoothness.py b/tools/perf/benchmarks/smoothness.py
index 1d832b7e589b0c7492d705165f90093ce37416a4..9c13c718022fed77b52afd656d5fbf1a2b62ca99 100644
--- a/tools/perf/benchmarks/smoothness.py
+++ b/tools/perf/benchmarks/smoothness.py
@@ -156,6 +156,25 @@ class SmoothnessSyncScrollKeyMobileSites(benchmark.Benchmark):
 
 
 @benchmark.Enabled('android')
+class SmoothnessSyncScrollKeyMobileSitesRerun(benchmark.Benchmark):
+  """Same as SmoothnessSyncScrollKeyMobileSites but each page runs twice and
+  only the second run's result is used. This is to test the impact of cache
+  optimization.
+  """

[jdduke (slow), 2015/02/27 23:36:03]

It seems overkill to repeat the entire pageset (x2!) just to validate the shader
cache... That's a pretty heavy burden for the perf bots that are already running
long.

+  tag = 'sync_scroll'
+  test = smoothness.SmoothnessDiscardFirstResult
+  page_set = page_sets.KeyMobileSitesSmoothPageSet
+  options = {'page_repeat': 2}
+
+  def CustomizeBrowserOptions(self, options):
+    silk_flags.CustomizeBrowserOptionsForSyncScrolling(options)
+
+  @classmethod
+  def Name(cls):
+    return 'smoothness.sync_scroll.key_mobile_sites_smooth.rerun'
+
+
+@benchmark.Enabled('android')
 class SmoothnessSimpleMobilePages(benchmark.Benchmark):
   """Measures rendering statistics for simple mobile sites page set.
   """