Status: Accepted
Owner: [email protected]
CC: [email protected], [email protected]
Labels: Type-Bug Priority-Medium OS-All
New issue 3663 by [email protected]: Clearing of ICs at GC degrades
performance
https://code.google.com/p/v8/issues/detail?id=3663
We clear polymorphic, megamorphic, and generic ICs at each mark-compact GC
to avoid memory leaks. This loses type-feedback information and leads to
poor performance.
For example, "Complex List" test at
http://samsaffron.github.io/ember-performance/?ember=1.8.0 runs:
- 203.53ms with clearing of ICs enabled (default flags)
- 182.59ms with clearing of ICs
disabled(--js-flags="--nocleanup-code-caches-at-gc")
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