45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
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#!/usr/bin/env python
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# Copyright (c) 2012 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import os
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import sys
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import time
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sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
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from telemetry.core import browser_finder
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from telemetry.core import browser_options
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def Main(args):
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options = browser_options.BrowserOptions()
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parser = options.CreateParser('telemetry_perf_test.py')
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options, args = parser.parse_args(args)
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browser_to_create = browser_finder.FindBrowser(options)
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assert browser_to_create
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with browser_to_create.Create() as b:
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tab = b.tabs[0]
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# Measure round-trip-time for evaluate
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times = []
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for i in range(1000):
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start = time.time()
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tab.EvaluateJavaScript('%i * 2' % i)
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times.append(time.time() - start)
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N = float(len(times))
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avg = sum(times, 0.0) / N
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squared_diffs = [(t - avg) * (t - avg) for t in times]
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stdev = sum(squared_diffs, 0.0) / (N - 1)
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times.sort()
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percentile_75 = times[int(0.75 * N)]
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print "%s: avg=%f; stdev=%f; min=%f; 75th percentile = %f" % (
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"Round trip time (seconds)",
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avg, stdev, min(times), percentile_75)
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return 0
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if __name__ == '__main__':
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sys.exit(Main(sys.argv[1:]))
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