Not the person you are asking but, 16 times seem like a lot, however it's going to heavily depends on how good the VM or JIT is at inlining.
Because `Array.forEach` is one method call for each iteration, when `for loops` stay on the same frame. If the compiler can't inline that, it's a "major" overhead compared to simply jumping back at the top of the loop.
Because `Array.forEach` is one method call for each iteration, when `for loops` stay on the same frame. If the compiler can't inline that, it's a "major" overhead compared to simply jumping back at the top of the loop.
Googling for it I find some benchmark showing a 3x performance: https://leanylabs.com/blog/js-forEach-map-reduce-vs-for-for_..., but they call `Array.push` in the loop, so it's possible the difference is even bigger in practice.