Run results for: Array vs Iterators

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/113.0

Browser: Firefox 113

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
array methods	13217.8 Ops/sec
iterators	394601.5 Ops/sec

Script Preparation code:

var numbers = Array.from({length: 5}, (v, i) => i)

Tests:

array methods
numbers .map(x => x+1) .map(x => x*2) .map(x => x-1) .map(x => x/2) .forEach(console.log)
iterators
function * map(mapperFn, iterable) { for (const item of iterable) { yield mapperFn(item); } } numbers = map(x => x+1, numbers); numbers = map(x => x*2, numbers); numbers = map(x => x-1, numbers); numbers = map(x => x/2, numbers); for (const item of numbers) { console.log(item); }