Benchmark: Add item to array: push vs spread vs assign vs assign+grow

Script Preparation code:

window.MAX_SIZE = 1000;

Tests:

Push item to an array
const items = []; for (let i = 0; i < MAX_SIZE; i++) { items.push(i); }
Append an item by spread
let items = []; for (let i = 0; i < MAX_SIZE; i++) { items = [...items, i]; }
Direct assign an item to an initialized array
const items = new Array(MAX_SIZE); for (let i = 0; i < MAX_SIZE; i++) { items[i] = i; }
Direct assign an item to an empty array
const items = new Array(); for (let i = 0; i < MAX_SIZE; i++) { items[i] = i; }

Rendered benchmark preparation results:

Previous results

Test case name	Result
Push item to an array
Append an item by spread
Direct assign an item to an initialized array
Direct assign an item to an empty array

Latest run results:

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Related benchmarks:

Add item to array: push vs spread vs assign vs assign+grow (version: 0)