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A comment on Why the New V8 Is So Damn Fast. Parent comment

Re:Why the New V8 Is So Damn Fast by mort96 on Tuesday July 31, 2018 @08:21AM (#17652554)
AFAIK, that's not true; the spec doesn't guarantee that it iterates in insertion order, it's just how it's commonly implemented in browsers.
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Re:Why the New V8 Is So Damn Fast by topaxi on Tuesday July 31, 2018 @10:23AM (#17653358)
Nope, they should be iterated in their defined order: https://tc39.github.io/ecma262/#sec-ordinaryownpropertykeys

I think they added this with ES2015.

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