Comment by Simonas Urbelis on "NodeJS: 4.8x faster if we go back to callbacks!"

I've modified the tests a little to be more like-for-like, added some alternative async/await implementations, and put them up on my github (can't link because I'm newly registered)

My main takeaways are:

The blocking promise version is now ~30% slower than the parallel one.
Parallel promises and async/await appear to be about 3.4-3.7x slower than the parallel callback version on my machine. Take the results with a massive pinch of salt since runtime variance is about 200ms for some reason.

This is a much older machine running Windows and doing 20% less iterations (due to open file limits on Windows) so the numbers are not quite directly comparable, but hopefully relative scaling remains mostly intact.

Nice! Thanks Simonas Urbelis. Thanks for checking through it too. That's a really interesting find.

I would love to be able to run the same code across different machines with different specs. My hunch was that the number of cores on a machine had a big effect on parallel performance too.

It's a shame you can't share your GitHub implementation. That would be lovely to see.

My aim, unless someone does it before me is to create a GitHub repo and be able to take advantage of their machines to run the tests and benchmark them too. That'll make the tests more fair. True.

Also, I have to decide whether I want to test just blocking or truly sequential. So as someone mentioned the node:test overhead, I may have to remove node:test completely so there are no promises or async awaits being used in the callback tests at all.

Thank you again for your comment. I truly appreciate it.

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