Highlights from meeting notes for today:

• Tim Taubert worked on Firefox UI speedups
• Lots of improvements to the profiler from Benoit Girard
• More incremental GC work from Jon Coppeard
• Vladan Djeric got all of the security reviews and should be able to land Nicholas Chaim’s fix for networked certificate validation: bug 726125 We spent most of the meeting discussing bug bug 784512. According several data sources Firefox 15 Beta loads pages slower than 14. Occasionally problems squeeze past our performance testing + telemetry infrastructure, this looks like one of these times. Unfortunately, it’s quite hard to reduce a few noisy signals to a concrete performance problem. If you can reproduce a performance regression to do with loading webpages/games/etc in FF15 vs FF14, please leave a comment.

Thanks!

Thanks for the great comments on my previous snappy updates. Bug 783755 should take care of the new cache size pref not sticking. Bug 718910 on hiding Cache directory from Spotlight is making progress too.

Commenter, kumalos, reported a tab switching regression and posted a profile recorded with our profiler as evidence. This proved to be an example of bug 783748, and lead us to identify a previously unknown issue in bug 784756. Constructive feedback like this is one of the main reasons I blog.

I highly encourage users interested in improving Firefox performance to use Nightly builds and report bugs with profiler traces attached.

Shutdown Times

I’ll end with our latest Telemetry data point. This one took a while to get right, but we finally track our shutdown speed.