tools/metrics/histograms/histograms.xml - Issue 1987013002: Add UMA to track time between preload discovery and reference

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Unified Diff: tools/metrics/histograms/histograms.xml

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Issue 1987013002: Add UMA to track time between preload discovery and reference (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@preload_timing_uma

Patch Set: update histograms.xml to be a bit clearer Created 4 years, 6 months ago

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Index: tools/metrics/histograms/histograms.xml

diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml

index fa59dadaded8c0993f48ff73f775cc7c6acb490c..3904041399d40e12722203d4eb9d448ed37a59d2 100644

--- a/tools/metrics/histograms/histograms.xml

+++ b/tools/metrics/histograms/histograms.xml

@@ -41503,6 +41503,17 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.

</summary>

</histogram>

+<histogram name="PreloadScanner.ReferenceTime" units="ms">

+ <owner>csharrison@chromium.org</owner>

+ <summary>

+ The time between preload discovery and when the resource is actually

+ referenced. This is implemented by marking when a preload is discovered by

+ the scanner, and when it has its first ResourceClient added to it. Note that

+ for link rel preloads, this tracks the time from scanner discory to DOM

+ discovery of the link declaration, not the actual resource.

+ </summary>

+</histogram>

<owner>davidben@chromium.org</owner>

<owner>pasko@chromium.org</owner>

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