Here's the profile: http://people.mozilla.com/~bgirard/cleopatra/?report=AMIfv96ZzvY5KslavR9qViykPVb0SYPtJZ6OpTwKT4xCY4VmKM5X45h4w9Mvyj0n0kBbfu53EZR4pc4XugE6hjmaZoQ-oMNMLxkT9hu7kS56rbZY148qVJm46_b2fm8opoRxk-tkqpceoZ2PdIteRuyF9F49pfLCXg Things of note: - I've annotated OfflineCache stuff and it does seem to be responsible for the main thread sqlite io. - We spend a bunch of time loading hyphenation tables. (Do we need to use hyphenation?) - We spend time loading and sanitizing fonts - There's 192 ms of waiting time after the end of the animation I'm working on annotating some more to get a better picture of where more of the time is spent.

Here's a profile with better annotations: http://people.mozilla.com/~bgirard/cleopatra/?report=AMIfv97E-dvDa9oml46f8y2RRrtClHI0ZnkmSTCEuzV-wkiLQ9V-OmGJuJlvDm25z_h5v7zIq0GsyejkrmSX4G3Yc0Am88HSgwQ0PUL_1cye8BqIivsHmSYZUZtTkvuf8R3Dp6orS3DhvLJPDBI8UEOT8cTg_zvHIg

(In reply to Jeff Muizelaar [:jrmuizel] from comment #1) > Here's a profile with better annotations: > > http://people.mozilla.com/~bgirard/cleopatra/?report=AMIfv97E- > dvDa9oml46f8y2RRrtClHI0ZnkmSTCEuzV-wkiLQ9V- > OmGJuJlvDm25z_h5v7zIq0GsyejkrmSX4G3Yc0Am88HSgwQ0PUL_1cye8BqIivsHmSYZUZtTkvuf8 > R3Dp6orS3DhvLJPDBI8UEOT8cTg_zvHIg Where do the annotations appear?

So, ah, the profile suggests that we're doing offline cache disk IO on the main thread. Please tell me that's not true.

I think offline cache is entirely on the main thread.

All offline cache SQLite IO is sync. FML. Will rewrite today with Thinker.

(In reply to Mike Hommey [:glandium] from comment #2) > (In reply to Jeff Muizelaar [:jrmuizel] from comment #1) > > Here's a profile with better annotations: > > > > http://people.mozilla.com/~bgirard/cleopatra/?report=AMIfv97E- > > dvDa9oml46f8y2RRrtClHI0ZnkmSTCEuzV-wkiLQ9V- > > OmGJuJlvDm25z_h5v7zIq0GsyejkrmSX4G3Yc0Am88HSgwQ0PUL_1cye8BqIivsHmSYZUZtTkvuf8 > > R3Dp6orS3DhvLJPDBI8UEOT8cTg_zvHIg > > Where do the annotations appear? A couple of new things are now grouped together. e.g. TextRun construction, hyphenation, css parsing etc.

Should we close this bug now, or make it a meta bug for some more specific bugs (like there still is mozGetAll's lying in the facebook code) ?

We're actively working on contacts performance in bug #871823. If you have specific actionable items, please open blockers against that bug. I will make a note of things in this bug and investigate them. Thanks!