Run results for: filter by indices

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36

Browser: Chrome 88

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
for push	268095.4 Ops/sec
reduce push	841506.7 Ops/sec
filter some	73446.3 Ops/sec

Script Preparation code:

var length = 100;
var value = 200;
var sublength = 5;
var list = Array.from({length: length}, () => Math.floor(Math.random() * value));
var indices = Array.from({length: sublength}, () => Math.floor(Math.random() * length));

Tests:

for push
var filtered = []; for (idx of indices) { filtered.push(list[idx]) }
reduce push
filtered = indices.reduce((res, idx) => { res.push(list[idx]); return res; }, []);
filter some
filtered = list.filter((item, idx) => { return indices.some((index) => index === idx); });

Run results for: filter by indices

for push

reduce push

filter some