This flag enables feedback allocation heuristics to be based on the
function size. The threshold for feedback allocation is set to
12 * bytecode size to roughly mimic the allocation after 12 invocations.
We tried 4 * bytecode size earlier and there were few memory regressions
on real world pages. Speedometer improved by ~1% [1, 2]. This time
trying with a higher factor this time to see if we still have
speedometer improvements without any memory regressions.
[1] https://bugs.chromium.org/p/chromium/issues/detail?id=1177124
[2] https://bugs.chromium.org/p/chromium/issues/detail?id=1177241
Change-Id: I39c7d4aaf90b948b07419e4598e2193b8355c067
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2752150
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73369}
With bytecode flushing and lazy feedback allocation, we need to call
%PrepareForOptimization before we call %OptimizeFunctionOnNextCall
Bug: v8:8801, v8:8394
Change-Id: I81918f174b2f97cbaa8b8ef2e459080c2581f535
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1588415
Commit-Queue: Mythri Alle <mythria@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61122}
- Add Map, WeakMap, Set, and WeakSet initial prototype maps to native context.
- Set and WeakSet constructors check whether prototype map differs from initial
before choosing the fast path.
Bug: chromium:798026
Change-Id: I5f9cc2463f89e17f06a66b565c625fce133d01fb
Reviewed-on: https://chromium-review.googlesource.com/853698
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50691}
