Array performance

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Init array and access by index
const n = 100;
const arr = new Array(n);

for (let i = 0; i < n; i += 1) {
	arr[i] = 2*i;
}
ready
Use push method
const n = 100;
const arr = [];

for (let i = 0; i < n; i += 1) {
	arr.push(2*i);
}
ready

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