| commit | 8e0ef9b9a028a959f521c7615a7cb53365e451ad | [log] [tgz] |
|---|---|---|
| author | Z Nguyen-Huu <duongn@microsoft.com> | Wed Jun 12 20:55:29 2019 |
| committer | Commit Bot <commit-bot@chromium.org> | Wed Jun 12 20:57:31 2019 |
| tree | be9024330ed6edeca811b8b2259d8a7bbee6a38c | |
| parent | 7b1f0c4f6c2fe1c172a7eb9e39c416310bdee6a8 [diff] |
Add fast path for proxy with preventExtensions trap ObjectPreventExtensions and ReflectPreventExtensions are now Torque builtins (previously CPP) and the Proxy path is implemented completely in Torque while everything else calls into runtime (and is thus a bit slower than previously). Perf improvement in micro-benchmark JSTests/Proxies Before: PreventExtensionsWithoutTrap-Proxies(Score): 1978 PreventExtensionsWithTrap-Proxies(Score): 739 After: PreventExtensionsWithoutTrap-Proxies(Score): 3017 PreventExtensionsWithTrap-Proxies(Score): 2044 Bug: v8:6664 Change-Id: I6505d730cea6b0d197f6f5d0540b39056c8b763d Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1652688 Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com> Reviewed-by: Jakob Gruber <jgruber@chromium.org> Reviewed-by: Maya Lekova <mslekova@chromium.org> Cr-Commit-Position: refs/heads/master@{#62130}
V8 is Google's open source JavaScript engine.
V8 implements ECMAScript as specified in ECMA-262.
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