The most user facing fix has been discovery and removal of some sneaky cache IO on the main thread.

Saptashi did some analysis on the impact of running sqlite in async mode on mobile. Turns out it’s only a win for DELETEs. Expect a blog post from him soon.

Dave discovered that we sometimes wait on locks on the main thread.

Jeff and Bas are looking into diagnosing when d2d causes a slowdown.

There was discussion of 4x reduction in cycle collection times landing soon, focusing on having cycle collector run less, etc. Lots of work(chromehang, profiler, …) is continuing from last week.