1073664 - [e10s] Large amounts of time spent in AddonInterpositionService with heavy CPOW usage

Status: RESOLVED FIXED

(Core :: DOM: Content Processes, defect)

Description

[John Schoenick [:johns]]

Profile: http://people.mozilla.org/~bgirard/cleopatra/#report=60c6d1546691e4a9bf51c585adf1f28b8ecad0bf

- Install profiler and lastpass in fresh profile
- Turn on e10s
- Load http://arstechnica.com/ in a tab, and attempt to scroll while page is loading

In this profile, the page is loading from about ~3100ms to ~10500ms while I attempt to scroll. It seems that about >50% of that time is in AddonInterpositionService -> SendInstanceOf

Comment 1

[Ben Bucksch (:BenB)]

me too
trunk (2015-04-06) with e10s
Addons: AdblockPlus, cliget, Greasemonkey, DOM Inspector

Noticed that my PC is loud, checked CPU:
[00:29:01] <BenB>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
[00:29:01] <BenB>  2877 ben       20   0 1703m 955m  51m R   68  6.0   5074:32 Web Content

Now, "Web Content" is not really helpful, is it?
Checked Web Developer | Performance, recorded 10s, looked at "JavaScript" view.
"AddonInterpositionService" everywhere, including at top with 89%

Comment 2

[Gabor Krizsanits (INACTIVE)]

With the latest e10s version of lastpass, and after the recent shim work + crash fixing this looks smooth on nightly. (with lastpass on AMO it is still pretty bad)