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caitpotter88 authored
When possible (non-Proxy receiver, expecting only String-names), walk the instance_descriptors() array rather than performing [[OwnPropertyKeys]]. If the map changes during a call to an accessor property, resort to a slower property lookup. For now, the fast path is not taken if the object contains any element keys. Offers a measurable improvement over the existing version, in select situations. BUG=v8:4663 LOG=N R=cbruni@chromium.org, verwaest@chromium.org, adamk@chromium.org Review URL: https://codereview.chromium.org/1751643003 Cr-Commit-Position: refs/heads/master@{#34567}
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