Run results for: Doing foreach right way vs fancy hyped way - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36 OPR/79.0.4143.72

Browser: Opera 79

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
for..of loop	1255802.2 Ops/sec
forEach - block	829023.1 Ops/sec
forEach - return	818824.2 Ops/sec
map	335332.5 Ops/sec
filter	295332.4 Ops/sec

Script Preparation code:

var arr = new Array(1000).fill(0);

Tests:

for..of loop
let count = 0; for (const item of arr) { count++; }
forEach - block
let count = 0; arr.forEach(() => { count++; });
forEach - return
let count = 0; arr.forEach(() => count++);
map
let count = 0; arr.map(() => count++);
filter
let count = 0; arr.filter(() => count++);