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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_UTIL_H_ | |
6 #define COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_UTIL_H_ | |
7 | |
8 #include "base/metrics/histogram_macros.h" | |
9 #include "base/optional.h" | |
10 #include "base/time/time.h" | |
11 | |
12 #define PAGE_LOAD_HISTOGRAM(name, sample) \ | |
13 UMA_HISTOGRAM_CUSTOM_TIMES(name, sample, \ | |
14 base::TimeDelta::FromMilliseconds(10), \ | |
15 base::TimeDelta::FromMinutes(10), 100) | |
16 | |
17 namespace page_load_metrics { | |
18 | |
19 struct PageLoadExtraInfo; | |
20 struct PageLoadTiming; | |
21 | |
22 // Returns true if: | |
23 // - We have timing information for the event. | |
24 // - The page load started while the page was in the foreground. | |
25 // - The event occurred prior to the page being moved to the background. | |
26 // When a page is backgrounded, some events (e.g. paint) are delayed. Since | |
27 // these data points can skew the mean, they should not be mixed with timing | |
28 // events that occurred in the foreground. | |
29 // If the event time delta and background time delta are equal, we still | |
30 // consider the event to be logged in the foreground histogram since any | |
31 // background specific handling would not yet have been applied to that event. | |
32 bool WasStartedInForegroundOptionalEventInForeground( | |
33 const base::Optional<base::TimeDelta>& event, | |
34 const PageLoadExtraInfo& info); | |
35 | |
36 // Returns true if: | |
37 // - Parse started and did not complete but the entire page load duration | |
38 // happened in the foreground. | |
39 // - Parse completed and happened entirely in the foreground. | |
40 bool WasParseInForeground(const base::Optional<base::TimeDelta>& parse_start, | |
41 const base::Optional<base::TimeDelta>& parse_stop, | |
42 const PageLoadExtraInfo& info); | |
43 } // namespace page_load_metrics | |
44 | |
45 #endif // COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_UTIL_H_ | |
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