[joezydeco]

Right. Show me the compiled object code and tell me how much faster it is.

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it."

— Brian W. Kernighan and P. J. Plauger in The Elements of Programming Style.

[hdhzy]

Well if you're comparing for loop to reduce or map in JavaScript then for will always win as it is a built in language construct and reduce involves costly callbacks. Interesting that the difference is only 7% on my Chrome for Android [0].

[0]: https://jsperf.com/foreach-vs-reduce-vs-for-loop

For loops have also an advantage that they can be used with yield and await (generators and async functions) while you cannot place these keywords inside a callback function.

[mdeltito]

Regarding your last point, this is also a nice benefit of for...of loops in JS, where you can use yield and await. It's sort of the best of both worlds.

[hdhzy]

Oh yes, exactly! I wonder why for of was not mentioned in the article...