1146533 - JS profiler shows function calls from all open tabs

Status: RESOLVED DUPLICATE of bug 899853

(DevTools :: Performance Tools (Profiler/Timeline), defect)

Description

[Alejandro Fernández]

Attachment: Schermafbeelding 2015-03-23 om 20.22.41.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Firefox/38.0
Build ID: 20150322004013

Steps to reproduce:

Open one tab with some JS constantly running (like the spotify web player).
Open another tab you want to profile javascript in.


Actual results:

You can see function calls from the background tab in the profiler


Expected results:

Only function calls from the active tab should be shown

Comment 1

[Jordan Santell [:jsantell] [@jsantell]]

This is the nature of all content be in the same process, running single-threaded JS. Even if we could filter out this information, it would affect the current tab's performance, so hiding it would be inaccurate. Maybe we can summarize all "other tab" processing in a single frame node, showing the cost relative to the profile, so you can see if another tab is affecting performance on the current tab, without getting into the details.

Maybe the work in bug 674779 will allow us to single out which frames come from which windows, which would allow us to filter, and aggregate, "other tab" frames

Comment 2

[Jordan Santell [:jsantell] [@jsantell]]

Found a bug for this on the profiler's end, which where any filtering should be done anyway, and has more history there: bug 899853

Comment 3

[David Lawrence [:dkl]]

Mistakenly filed against Firefox 38 and should be instead 38 Branch. Sorry for the spam. dkl