Run results for: spread vs concat vs passing by reference

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Browser: Chrome 70

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Tests:

Spread
function q(){ return [{}]; } let t = []; for (let i = 0; i < 1000; i++){ t = [...t, ...q()]; }
Concat
function q(){ return [{}]; } let t = []; for (let i = 0; i < 1000; i++){ t.concat(q()); }
Pass by reference
function q(arr){ arr.push({}) } const t = []; for (let i = 0; i < 1000; i++){ q(t); }