Low Level Tools/2018Q4

Nick

Planned

DocShell: implement session history serialization in IPDL.

• Not completed.
• After starting on this I determined that it required understanding a lot of gnarly DOM internals, and wasn't a good use of my time.

Finish cleaning up and slimming down static atoms.

• 100% done.
• Tracking bug, blog post.

Implement three improvements to Valgrind profiling tools I use with rustc.

• 100%+ completed.
• Improve callgrind_annotate output. Some readability improvements.
• Use inlined frames in Massif XTree output. Makes stack traces much easier to understand.
• Add a --show-percs option to cg_annotate and callgrind_annotate.
• Completely overhauled DHAT.
  • Improvements made to rustc and Firefox thanks to this: #55167, #55346, #55383, #55384, #55501, #55525, #55556, #55574, #55604, #55777, #55558, #55745, #55778, #55905, #55906, #56268, #56090, #56269, #56336, #56369, (ena crate) #14.