| commit | 866782e0e068e2a2656b68857dc899435d7cbb45 | [log] [tgz] |
|---|---|---|
| author | Benedikt Meurer <bmeurer@chromium.org> | Thu Sep 07 09:12:39 2017 |
| committer | Benedikt Meurer <bmeurer@chromium.org> | Thu Sep 07 10:43:52 2017 |
| tree | d71866cb92759a3f9585971649ab6a12fe50a9d3 | |
| parent | ccabada6f3606a6b0fb3d70dcc793bed8b156ed6 [diff] |
[turbofan] Don't introduce unnecessary map checks. Introduce NodeProperties::NoObservableSideEffectBetween to check if there's any observable side effect between two nodes in the effect chain. Use this to guard the insertion of potentially redundant map checks in the lowering of Object.prototype.hasOwnProperty and keyed accesses within a for..in loop. This gives another boost on the for..in performance front. Bug: v8:6702 Change-Id: I68133f14ad388a1a7422714319c9b323d5cf8bc4 Reviewed-on: https://chromium-review.googlesource.com/654640 Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Reviewed-by: Michael Stanton <mvstanton@chromium.org> Cr-Commit-Position: refs/heads/master@{#47869}
V8 is Google's open source JavaScript engine.
V8 implements ECMAScript as specified in ECMA-262.
V8 is written in C++ and is used in Google Chrome, the open source browser from Google.
V8 can run standalone, or can be embedded into any C++ application.
V8 Project page: https://github.com/v8/v8/wiki
Checkout depot tools, and run
fetch v8
This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run
git pull origin
gclient sync
For fetching all branches, add the following into your remote configuration in .git/config:
fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
fetch = +refs/tags/*:refs/tags/*
Please follow the instructions mentioned on the V8 wiki.