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1 # Copyright 2013 The Chromium Authors. All rights reserved. | 1 # Copyright 2013 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 from metrics import Metric | 5 from metrics import Metric |
| 6 from telemetry.value import improvement_direction |
6 from telemetry.value import scalar | 7 from telemetry.value import scalar |
7 | 8 |
8 class LoadingMetric(Metric): | 9 class LoadingMetric(Metric): |
9 """A metric for page loading time based entirely on window.performance""" | 10 """A metric for page loading time based entirely on window.performance""" |
10 | 11 |
11 def Start(self, page, tab): | 12 def Start(self, page, tab): |
12 raise NotImplementedError() | 13 raise NotImplementedError() |
13 | 14 |
14 def Stop(self, page, tab): | 15 def Stop(self, page, tab): |
15 raise NotImplementedError() | 16 raise NotImplementedError() |
16 | 17 |
17 def AddResults(self, tab, results): | 18 def AddResults(self, tab, results): |
18 load_timings = tab.EvaluateJavaScript('window.performance.timing') | 19 load_timings = tab.EvaluateJavaScript('window.performance.timing') |
19 | 20 |
20 # NavigationStart relative markers in milliseconds. | 21 # NavigationStart relative markers in milliseconds. |
21 load_start = ( | 22 load_start = ( |
22 float(load_timings['loadEventStart']) - load_timings['navigationStart']) | 23 float(load_timings['loadEventStart']) - load_timings['navigationStart']) |
23 results.AddValue(scalar.ScalarValue( | 24 results.AddValue(scalar.ScalarValue( |
24 results.current_page, 'load_start', 'ms', load_start)) | 25 results.current_page, 'load_start', 'ms', load_start, |
| 26 improvement_direction=improvement_direction.DOWN)) |
25 | 27 |
26 dom_content_loaded_start = ( | 28 dom_content_loaded_start = ( |
27 float(load_timings['domContentLoadedEventStart']) - | 29 float(load_timings['domContentLoadedEventStart']) - |
28 load_timings['navigationStart']) | 30 load_timings['navigationStart']) |
29 results.AddValue(scalar.ScalarValue( | 31 results.AddValue(scalar.ScalarValue( |
30 results.current_page, 'dom_content_loaded_start', 'ms', | 32 results.current_page, 'dom_content_loaded_start', 'ms', |
31 dom_content_loaded_start)) | 33 dom_content_loaded_start, |
| 34 improvement_direction=improvement_direction.DOWN)) |
32 | 35 |
33 fetch_start = ( | 36 fetch_start = ( |
34 float(load_timings['fetchStart']) - load_timings['navigationStart']) | 37 float(load_timings['fetchStart']) - load_timings['navigationStart']) |
35 results.AddValue(scalar.ScalarValue( | 38 results.AddValue(scalar.ScalarValue( |
36 results.current_page, 'fetch_start', 'ms', fetch_start, | 39 results.current_page, 'fetch_start', 'ms', fetch_start, |
37 important=False)) | 40 important=False, improvement_direction=improvement_direction.DOWN)) |
38 | 41 |
39 request_start = ( | 42 request_start = ( |
40 float(load_timings['requestStart']) - load_timings['navigationStart']) | 43 float(load_timings['requestStart']) - load_timings['navigationStart']) |
41 results.AddValue(scalar.ScalarValue( | 44 results.AddValue(scalar.ScalarValue( |
42 results.current_page, 'request_start', 'ms', request_start, | 45 results.current_page, 'request_start', 'ms', request_start, |
43 important=False)) | 46 important=False, improvement_direction=improvement_direction.DOWN)) |
44 | 47 |
45 # Phase measurements in milliseconds. | 48 # Phase measurements in milliseconds. |
46 domain_lookup_duration = ( | 49 domain_lookup_duration = ( |
47 float(load_timings['domainLookupEnd']) - | 50 float(load_timings['domainLookupEnd']) - |
48 load_timings['domainLookupStart']) | 51 load_timings['domainLookupStart']) |
49 results.AddValue(scalar.ScalarValue( | 52 results.AddValue(scalar.ScalarValue( |
50 results.current_page, 'domain_lookup_duration', 'ms', | 53 results.current_page, 'domain_lookup_duration', 'ms', |
51 domain_lookup_duration, important=False)) | 54 domain_lookup_duration, important=False, |
| 55 improvement_direction=improvement_direction.DOWN)) |
52 | 56 |
53 connect_duration = ( | 57 connect_duration = ( |
54 float(load_timings['connectEnd']) - load_timings['connectStart']) | 58 float(load_timings['connectEnd']) - load_timings['connectStart']) |
55 results.AddValue(scalar.ScalarValue( | 59 results.AddValue(scalar.ScalarValue( |
56 results.current_page, 'connect_duration', 'ms', connect_duration, | 60 results.current_page, 'connect_duration', 'ms', connect_duration, |
57 important=False)) | 61 important=False, improvement_direction=improvement_direction.DOWN)) |
58 | 62 |
59 request_duration = ( | 63 request_duration = ( |
60 float(load_timings['responseStart']) - load_timings['requestStart']) | 64 float(load_timings['responseStart']) - load_timings['requestStart']) |
61 results.AddValue(scalar.ScalarValue( | 65 results.AddValue(scalar.ScalarValue( |
62 results.current_page, 'request_duration', 'ms', request_duration, | 66 results.current_page, 'request_duration', 'ms', request_duration, |
63 important=False)) | 67 important=False, improvement_direction=improvement_direction.DOWN)) |
64 | 68 |
65 response_duration = ( | 69 response_duration = ( |
66 float(load_timings['responseEnd']) - load_timings['responseStart']) | 70 float(load_timings['responseEnd']) - load_timings['responseStart']) |
67 results.AddValue(scalar.ScalarValue( | 71 results.AddValue(scalar.ScalarValue( |
68 results.current_page, 'response_duration', 'ms', response_duration, | 72 results.current_page, 'response_duration', 'ms', response_duration, |
69 important=False)) | 73 important=False, improvement_direction=improvement_direction.DOWN)) |
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