V8 adds support for top-level await

Re:V8 adds support for top-level await by Arelius on Tuesday September 24, 2019 @10:21PM (#21066952)

I don't think it's true that the engine must be using a mutex to support it's async functionality. Or that it is true that an OS mutex will be any more efficient than alternative solutions.

A mutex really can only exist to serialize async code. If you want it serialized that likely means that code shouldn't be async in the first place.

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Re:V8 adds support for top-level await by kbenson on Wednesday September 25, 2019 @01:01AM (#21067744)

You're right that it may not be required for the async functionality (especially since lock-free schedulers exist, and the engine is basically a single processor scheduler for processes). I do think it's likely in use other places though, just because it's much easier to write correct code with one.

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