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# Copyright (c) 2012 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.
# The test takes a list of URLs through stdin and prints results in CSV format.
# Example: python run_scroll_test.py < data/urls.txt > test_results.csv
from chrome_remote_control import multi_page_benchmark
from chrome_remote_control import util
class FirstPaintTimeBenchmark(multi_page_benchmark.MultiPageBenchmark):
def MeasurePage(self, _, tab, results):
if tab.browser.is_content_shell:
results.Add('first_paint', 'seconds', 'unsupported')
return
tab.runtime.Execute("""
window.__rafFired = false;
window.webkitRequestAnimationFrame(function() {
window.__rafFired = true;
});
""")
util.WaitFor(lambda: tab.runtime.Evaluate('window.__rafFired'), 60)
first_paint_secs = tab.runtime.Evaluate(
'window.chrome.loadTimes().firstPaintTime - ' +
'window.chrome.loadTimes().requestTime')
results.Add('first_paint', 'seconds', round(first_paint_secs, 1))
def Main():
return multi_page_benchmark.Main(FirstPaintTimeBenchmark())
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