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Amazing, the "performance tests" here operate on a list of only ten items long: https://github.com/codemix/fast.js/blob/master/bench/for-eac...

I'm sure that is a statistically valid way to measure performance.

you're right in that it's important to consider inputs of different sizes. I did this for the indexOf() functions, I'll do the same here, thanks!

To prove its worth, try showing a Real use case.