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1 # Copyright 2012 The Chromium Authors. All rights reserved. | 1 # Copyright 2012 The Chromium Authors. All rights reserved. |
2 # Use of this source code is governed by a BSD-style license that can be | 2 # Use of this source code is governed by a BSD-style license that can be |
3 # found in the LICENSE file. | 3 # found in the LICENSE file. |
4 | 4 |
5 """The page cycler measurement. | 5 """The page cycler measurement. |
6 | 6 |
7 This measurement registers a window load handler in which is forces a layout and | 7 This measurement registers a window load handler in which is forces a layout and |
8 then records the value of performance.now(). This call to now() measures the | 8 then records the value of performance.now(). This call to now() measures the |
9 time from navigationStart (immediately after the previous page's beforeunload | 9 time from navigationStart (immediately after the previous page's beforeunload |
10 event) until after the layout in the page's load event. In addition, two garbage | 10 event) until after the layout in the page's load event. In addition, two garbage |
11 collections are performed in between the page loads (in the beforeunload event). | 11 collections are performed in between the page loads (in the beforeunload event). |
12 This extra garbage collection time is not included in the measurement times. | 12 This extra garbage collection time is not included in the measurement times. |
13 | |
14 Finally, various memory and IO statistics are gathered at the very end of | 13 Finally, various memory and IO statistics are gathered at the very end of |
15 cycling all pages. | 14 cycling all pages. |
16 """ | 15 """ |
17 | 16 |
18 import collections | 17 import collections |
19 import os | 18 import os |
20 | 19 |
21 from telemetry.core import util | 20 from telemetry.core import util |
22 from telemetry.page import legacy_page_test | 21 from telemetry.page import legacy_page_test |
23 from telemetry.value import scalar | 22 from telemetry.value import scalar |
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104 | 103 |
105 keychain_metric.KeychainMetric.CustomizeBrowserOptions(options) | 104 keychain_metric.KeychainMetric.CustomizeBrowserOptions(options) |
106 | 105 |
107 def ValidateAndMeasurePage(self, page, tab, results): | 106 def ValidateAndMeasurePage(self, page, tab, results): |
108 tab.WaitForJavaScriptExpression('__pc_load_time', 60) | 107 tab.WaitForJavaScriptExpression('__pc_load_time', 60) |
109 | 108 |
110 chart_name_prefix = ('cold_' if self.IsRunCold(page.url) else | 109 chart_name_prefix = ('cold_' if self.IsRunCold(page.url) else |
111 'warm_') | 110 'warm_') |
112 | 111 |
113 results.AddValue(scalar.ScalarValue( | 112 results.AddValue(scalar.ScalarValue( |
| 113 results.current_page, '%stimes-page_load_time' % chart_name_prefix, |
| 114 'ms', tab.EvaluateJavaScript('__pc_load_time'), |
| 115 description='Average page load time. Measured from ' |
| 116 'performance.timing.navigationStart until the completion ' |
| 117 'time of a layout after the window.load event. Cold times ' |
| 118 'are the times when the page is loaded cold, i.e. without ' |
| 119 'loading it before, and warm times are times when the ' |
| 120 'page is loaded after being loaded previously.')) |
| 121 results.AddValue(scalar.ScalarValue( |
| 122 results.current_page, '%stimes-time_to_onload' % chart_name_prefix, |
| 123 'ms', tab.EvaluateJavaScript('performance.timing.loadEventStart' |
| 124 '- performance.timing.navigationStart'), |
| 125 description='Time to onload. This is temporary metric to check that ' |
| 126 'PCv1 and PCv2 emit similar results')) |
| 127 |
| 128 # TODO(kouhei): Remove below. crbug.com/616342 |
| 129 results.AddValue(scalar.ScalarValue( |
114 results.current_page, '%stimes.page_load_time' % chart_name_prefix, | 130 results.current_page, '%stimes.page_load_time' % chart_name_prefix, |
115 'ms', tab.EvaluateJavaScript('__pc_load_time'), | 131 'ms', tab.EvaluateJavaScript('__pc_load_time'), |
116 description='Average page load time. Measured from ' | 132 description='Average page load time. Measured from ' |
117 'performance.timing.navigationStart until the completion ' | 133 'performance.timing.navigationStart until the completion ' |
118 'time of a layout after the window.load event. Cold times ' | 134 'time of a layout after the window.load event. Cold times ' |
119 'are the times when the page is loaded cold, i.e. without ' | 135 'are the times when the page is loaded cold, i.e. without ' |
120 'loading it before, and warm times are times when the ' | 136 'loading it before, and warm times are times when the ' |
121 'page is loaded after being loaded previously.')) | 137 'page is loaded after being loaded previously.')) |
122 results.AddValue(scalar.ScalarValue( | 138 results.AddValue(scalar.ScalarValue( |
123 results.current_page, '%stimes.time_to_onload' % chart_name_prefix, | 139 results.current_page, '%stimes.time_to_onload' % chart_name_prefix, |
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153 # preserve any initial profile cache for as long as possible. | 169 # preserve any initial profile cache for as long as possible. |
154 # The second is that, if we did cold runs first, we'd have a transition | 170 # The second is that, if we did cold runs first, we'd have a transition |
155 # page set during which we wanted the run for each URL to both | 171 # page set during which we wanted the run for each URL to both |
156 # contribute to the cold data and warm the catch for the following | 172 # contribute to the cold data and warm the catch for the following |
157 # warm run, and clearing the cache before the load of the following | 173 # warm run, and clearing the cache before the load of the following |
158 # URL would eliminate the intended warmup for the previous URL. | 174 # URL would eliminate the intended warmup for the previous URL. |
159 return self._has_loaded_page[url] >= self._cold_run_start_index | 175 return self._has_loaded_page[url] >= self._cold_run_start_index |
160 | 176 |
161 def DidRunPage(self, platform): | 177 def DidRunPage(self, platform): |
162 self._power_metric.Close() | 178 self._power_metric.Close() |
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