[runtime] Handle element in for-in fast path that uses PrototypeInfo cache
This can speed up the below micro-bench by 3x and improve JetStream2-tagcloud-SP case by ~2%. Object.prototype.foo = function() {}; let array = ['a','b','c','d','e']; let start = Date.now(); for (let i = 0; i < 1e5; i++) { for (let j in array) {} } console.log(Date.now() - start); Contributed by tao.pan@intel.com Change-Id: I44c948c2e4c28b8e42192f36802a5ea0f82bbe25 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2049903Reviewed-by:Toon Verwaest <verwaest@chromium.org> Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com> Cr-Commit-Position: refs/heads/master@{#66362}
Showing
Please
register
or
sign in
to comment