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A comment on Using const/let instead of var can make JavaScript code run 10× slower in Webkit. Parent comment

Re:Using const/let instead of var can make JavaScript code r... by kjksf on Wednesday October 21, 2020 @01:52AM (#24845117)
In this particular case, they were not optimizing for Chrome. They generated the code that was obvious to generate.

Because of a perf bug in WebKit they added a flag to generate less correct code that is fast in WebKit.

If anything, it's a case of optimizing towards WebKit.

But really, it's a case of performance bug in WebKit and them adding a work-around.

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