Run results for: iso date string sort comparison

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
sort	1392189.0 Ops/sec
localcompare	666820.2 Ops/sec
manual compare	947422.9 Ops/sec
date convert to date + sort a-b (timezone safe)	62254.6 Ops/sec
date convert to timestamp + sort (timezone safe)	95383.2 Ops/sec

Script Preparation code:

var dates = [
  '2021-11-22T11:00:00.000Z',
  '2021-11-22T07:00:00.000Z',
  '2021-11-24T12:30:00.000Z',
  '2021-11-24T07:00:00.000Z',
  '2021-11-24T07:00:00.000Z',
  '2021-11-26T07:00:00.000Z',
  '2021-11-26T12:30:00.000Z',
  '2021-11-26T12:30:00.000Z',
  '2021-11-27T11:00:00.000Z',
  '2021-11-27T12:30:00.000Z',
  '2021-09-22T11:00:00.000Z',
  '2021-09-22T07:00:00.000Z',
  '2021-09-24T12:30:00.000Z',
  '2021-09-24T07:00:00.000Z',
  '2021-09-24T07:00:00.000Z',
  '2021-09-26T07:00:00.000Z',
  '2021-05-26T12:30:00.000Z',
  '2021-12-26T12:30:00.000Z',
  '2021-09-27T11:00:00.000Z',
  '2021-09-27T12:30:00.000Z',
];

Tests:

sort
const sorted = dates.sort();
localcompare
const sorted = dates.sort((a,b)=>a.localeCompare(b));
manual compare
const sorted = dates.sort(( a, b )=> a < b ? -1 : a > b ? 1 : 0);
date convert to date + sort a-b (timezone safe)
const sorted = dates.map(date=>new Date(date)).sort(( a, b )=> a-b);
date convert to timestamp + sort (timezone safe)
const sorted = dates.map(date=>Date.parse(date)).sort();

Run results for: iso date string sort comparison

compares ways of sorting a list of dates in the form of ISO dates

sort

localcompare

manual compare

date convert to date + sort a-b (timezone safe)

date convert to timestamp + sort (timezone safe)