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1 #!/usr/bin/env python | 1 #!/usr/bin/env python |
2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. | 2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. |
3 # Use of this source code is governed by a BSD-style license that can be | 3 # Use of this source code is governed by a BSD-style license that can be |
4 # found in the LICENSE file. | 4 # found in the LICENSE file. |
5 import os | 5 import os |
6 import sys | 6 import sys |
7 import time | 7 import time |
8 | 8 |
9 sys.path.append(os.path.join(os.path.dirname(__file__), '..')) | 9 sys.path.append(os.path.join(os.path.dirname(__file__), '..')) |
10 | 10 |
11 import telemetry | 11 from telemetry.core import browser_finder |
| 12 from telemetry.core import browser_options |
12 | 13 |
13 def Main(args): | 14 def Main(args): |
14 options = telemetry.BrowserOptions() | 15 options = browser_options.BrowserOptions() |
15 parser = options.CreateParser('telemetry_perf_test.py') | 16 parser = options.CreateParser('telemetry_perf_test.py') |
16 options, args = parser.parse_args(args) | 17 options, args = parser.parse_args(args) |
17 | 18 |
18 browser_to_create = telemetry.FindBrowser(options) | 19 browser_to_create = browser_finder.FindBrowser(options) |
19 assert browser_to_create | 20 assert browser_to_create |
20 with browser_to_create.Create() as b: | 21 with browser_to_create.Create() as b: |
21 tab = b.tabs[0] | 22 tab = b.tabs[0] |
22 | 23 |
23 # Measure round-trip-time for evaluate | 24 # Measure round-trip-time for evaluate |
24 times = [] | 25 times = [] |
25 for i in range(1000): | 26 for i in range(1000): |
26 start = time.time() | 27 start = time.time() |
27 tab.EvaluateJavaScript('%i * 2' % i) | 28 tab.EvaluateJavaScript('%i * 2' % i) |
28 times.append(time.time() - start) | 29 times.append(time.time() - start) |
29 N = float(len(times)) | 30 N = float(len(times)) |
30 avg = sum(times, 0.0) / N | 31 avg = sum(times, 0.0) / N |
31 squared_diffs = [(t - avg) * (t - avg) for t in times] | 32 squared_diffs = [(t - avg) * (t - avg) for t in times] |
32 stdev = sum(squared_diffs, 0.0) / (N - 1) | 33 stdev = sum(squared_diffs, 0.0) / (N - 1) |
33 times.sort() | 34 times.sort() |
34 percentile_75 = times[int(0.75 * N)] | 35 percentile_75 = times[int(0.75 * N)] |
35 | 36 |
36 print "%s: avg=%f; stdev=%f; min=%f; 75th percentile = %f" % ( | 37 print "%s: avg=%f; stdev=%f; min=%f; 75th percentile = %f" % ( |
37 "Round trip time (seconds)", | 38 "Round trip time (seconds)", |
38 avg, stdev, min(times), percentile_75) | 39 avg, stdev, min(times), percentile_75) |
39 | 40 |
40 return 0 | 41 return 0 |
41 | 42 |
42 if __name__ == '__main__': | 43 if __name__ == '__main__': |
43 sys.exit(Main(sys.argv[1:])) | 44 sys.exit(Main(sys.argv[1:])) |
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