1185926 - [Meta] Fix accuracy of PerformanceStats

Status: RESOLVED WONTFIX

(Toolkit :: Performance Monitoring, defect)

Description

[David Teller [:Yoric] - still alive but not very active]

Experience shows that PerformanceStats is not always accurate. This has been traced to the following factors:
- performance is influenced by overall system activity;
- the clocks we use are not very accurate;
- the clocks we use are not monotonic.

We need to fix this.

Comment 1

[David Teller [:Yoric] - still alive but not very active]

More precisely:
- the walltime clocks we use are not very accurate;
- the walltime clocks we use are not monotonic;
- the performance clocks we use are not very accurate;
- the performance clocks we use are not monotonic.

Comment 2

[David Teller [:Yoric] - still alive but not very active]

Filed bug 1188250 as a possible alternative on CPOW monitoring, which would not depend on system load.

Comment 3

[Florian Quèze [:florian]]

about:performance is being redesigned; mass closing the bugs related to parts of the current about:performance page that we are not keeping.

Our goals with the redesign are to reduce the overhead caused by having the page opened, increase the reliability of the displayed information, and make the offered information actionable for most users. The back-end work is being tracked in bug 1419681.