Benchmark: Array.from vs spread vs construct manually 5

Script Preparation code:

var src = Object.keys([...Array(10000)]);

Tests:

Array.from
var z = {}; z.z = Array.from(src[Symbol.iterator]());
manual
var z = {}; let n = src.length; let a = Array(n); let iter = src[Symbol.iterator](); for (let i = 0; i < n; ++i) {a[i] = iter.next().value;}; z.z = a;
spread
var z = {}; z.z = [...(src[Symbol.iterator]())];
manual 2
var z = {}; let a = Array(src.length); let iter = src[Symbol.iterator](); for (let i = 0, obj = iter.next(); !obj.done; obj = iter.next()) { a[i++] = obj.value;}; z.z = a;
manual 3
var z = {}; let n = src.length; let a = Array(n); let iter = src[Symbol.iterator](); for (let i = n - 1; i >= 0; --i) {a[i] = iter.next().value;}; z.z = a;

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 14 on iOS 14.5.1

Array.from vs spread vs construct manually 5 (version: 2)