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Starred by 9 users

Issue metadata

Status: Duplicate
Owner:
Closed: Dec 2015
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: All
Pri: 2
Type: Feature



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DevTools: [timeline,network] should surface and highlight User Timing marks

Project Member Reported by igrigo...@chromium.org, Nov 6 2014 Back to list

Issue description

User Timing [1] allows developers to define own "marks" in the page load / interaction cycle and measure duration of critical parts of the page/app - e.g. initial load sequence, post-load interactions, arbitrary code execution, etc.

We should surface these marks in the Network + Timeline panels to provide better visibility into app-specific metrics - see [2]. Currently, we show DCL/onload in network panel, we should also surface user defined marks.

Example implementation in WPT: http://blog.patrickmeenan.com/2013/07/measuring-performance-of-user-experience.html - I'm not convinced that the vertical bar is the best UI, especially if developer specifies many marks, but I'll defer that to the UX folks on the team... Some combination of bars/events + summary table would be ideal.

[1] http://www.w3.org/TR/user-timing/#introduction
[2] http://www.stevesouders.com/blog/2013/05/13/moving-beyond-window-onload/

P.S. Additional context: http://lists.w3.org/Archives/Public/public-web-perf/2014Oct/thread.html#msg29
 
Owner: yu...@chromium.org
Status: Assigned

Comment 2 by yu...@chromium.org, Nov 10 2014

Cc: a...@chromium.org loislo@chromium.org

Comment 3 by yu...@chromium.org, Nov 10 2014

Labels: Cr-Platform-DevTools-Performance

Comment 4 by yu...@chromium.org, Nov 14 2014

Cc: charli...@gmail.com
Cc: eustas@chromium.org
Summary: DevTools: [timeline,network] should surface and highlight User Timing marks (was: DevTools should surface and highlight User Timing marks)

Comment 6 by loislo@chromium.org, Jul 17 2015

Cc: -loislo@chromium.org

Comment 7 by a...@chromium.org, Dec 3 2015

Owner: a...@chromium.org

Comment 9 by a...@chromium.org, Dec 19 2015

Labels: -Type-Bug Type-Feature
Mergedinto: 268563
Status: Duplicate

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