for loop comparison

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traditional for
const arr = new Array(1e7).fill(0);
for (let i = 0, il = arr.length; i < il; i++) {
	
}
ready
for...of
const arr = new Array(1e7).fill(0);
for (let value of arr) {
	
}
ready
for...in
const arr = new Array(1e7).fill(0);
for (let key in arr) {
	
}
ready
.forEach
const arr = new Array(1e7).fill(0);
arr.forEach(function(){});
ready

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