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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 | 13 |
14 Finally, various memory and IO statistics are gathered at the very end of | 14 Finally, various memory and IO statistics are gathered at the very end of |
15 cycling all pages. | 15 cycling all pages. |
16 """ | 16 """ |
17 | 17 |
18 import collections | 18 import collections |
19 import os | 19 import os |
20 | 20 |
21 from metrics import cpu | 21 from metrics import cpu |
22 from metrics import memory | 22 from metrics import memory |
23 from metrics import power | 23 from metrics import power |
24 from metrics import speedindex | 24 from metrics import speedindex |
25 from metrics import v8_object_stats | 25 from metrics import v8_object_stats |
26 from telemetry.core import util | 26 from telemetry.core import util |
27 from telemetry.page import page_test | 27 from telemetry.page import page_test |
| 28 from telemetry.value import improvement_direction |
28 from telemetry.value import scalar | 29 from telemetry.value import scalar |
29 | 30 |
30 | 31 |
31 class PageCycler(page_test.PageTest): | 32 class PageCycler(page_test.PageTest): |
32 def __init__(self, page_repeat, pageset_repeat, cold_load_percent=50, | 33 def __init__(self, page_repeat, pageset_repeat, cold_load_percent=50, |
33 record_v8_object_stats=False, report_speed_index=False, | 34 record_v8_object_stats=False, report_speed_index=False, |
34 clear_cache_before_each_run=False): | 35 clear_cache_before_each_run=False): |
35 super(PageCycler, self).__init__( | 36 super(PageCycler, self).__init__( |
36 clear_cache_before_each_run=clear_cache_before_each_run) | 37 clear_cache_before_each_run=clear_cache_before_each_run) |
37 | 38 |
(...skipping 80 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
118 'warm_') | 119 'warm_') |
119 | 120 |
120 results.AddValue(scalar.ScalarValue( | 121 results.AddValue(scalar.ScalarValue( |
121 results.current_page, '%stimes.page_load_time' % chart_name_prefix, | 122 results.current_page, '%stimes.page_load_time' % chart_name_prefix, |
122 'ms', tab.EvaluateJavaScript('__pc_load_time'), | 123 'ms', tab.EvaluateJavaScript('__pc_load_time'), |
123 description='Average page load time. Measured from ' | 124 description='Average page load time. Measured from ' |
124 'performance.timing.navigationStart until the completion ' | 125 'performance.timing.navigationStart until the completion ' |
125 'time of a layout after the window.load event. Cold times ' | 126 'time of a layout after the window.load event. Cold times ' |
126 'are the times when the page is loaded cold, i.e. without ' | 127 'are the times when the page is loaded cold, i.e. without ' |
127 'loading it before, and warm times are times when the ' | 128 'loading it before, and warm times are times when the ' |
128 'page is loaded after being loaded previously.')) | 129 'page is loaded after being loaded previously.', |
| 130 improvement_direction=improvement_direction.DOWN)) |
129 | 131 |
130 self._has_loaded_page[page.url] += 1 | 132 self._has_loaded_page[page.url] += 1 |
131 | 133 |
132 self._power_metric.Stop(page, tab) | 134 self._power_metric.Stop(page, tab) |
133 self._memory_metric.Stop(page, tab) | 135 self._memory_metric.Stop(page, tab) |
134 self._memory_metric.AddResults(tab, results) | 136 self._memory_metric.AddResults(tab, results) |
135 self._power_metric.AddResults(tab, results) | 137 self._power_metric.AddResults(tab, results) |
136 | 138 |
137 self._cpu_metric.Stop(page, tab) | 139 self._cpu_metric.Stop(page, tab) |
138 self._cpu_metric.AddResults(tab, results) | 140 self._cpu_metric.AddResults(tab, results) |
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154 | 156 |
155 def ShouldRunCold(self, url): | 157 def ShouldRunCold(self, url): |
156 # We do the warm runs first for two reasons. The first is so we can | 158 # We do the warm runs first for two reasons. The first is so we can |
157 # preserve any initial profile cache for as long as possible. | 159 # preserve any initial profile cache for as long as possible. |
158 # The second is that, if we did cold runs first, we'd have a transition | 160 # The second is that, if we did cold runs first, we'd have a transition |
159 # page set during which we wanted the run for each URL to both | 161 # page set during which we wanted the run for each URL to both |
160 # contribute to the cold data and warm the catch for the following | 162 # contribute to the cold data and warm the catch for the following |
161 # warm run, and clearing the cache before the load of the following | 163 # warm run, and clearing the cache before the load of the following |
162 # URL would eliminate the intended warmup for the previous URL. | 164 # URL would eliminate the intended warmup for the previous URL. |
163 return (self._has_loaded_page[url] >= self._cold_run_start_index) | 165 return (self._has_loaded_page[url] >= self._cold_run_start_index) |
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