Benchmark: Spread vs concat vs unshift (fair) to join arrays test

Script Preparation code:

var a = [1,2,3];
var b = [4,5,6];

Tests:

spread
b=[...a,...b];
concat
b=a.concat(b);
unshift (forEach)
var c = []; a.forEach(el => c.unshift(el)) b.forEach(el => c.unshift(el))
unshift (spread)
var c = []; c.unshift(...a); c.unshift(...b);
push
const a = [1, 2, 3]; const b = [4, 5, 6]; const c = []; const aLen = a.length; const bLen = b.length; let i = 0; for (; i < aLen; i++) { c.push(a[i]); } i = 0 for (; i < bLen; i++) { c.push(b[i]); }

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36

Browser/OS: Chrome 106 on Windows

Spread vs concat vs unshift (fair) to join arrays test (version: 0)