Run results for: Array sort & map vs. map & sort

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
map & sort	51.6 Ops/sec
sort & map	137.7 Ops/sec

Script Preparation code:

function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}

var arr = [];
for(var i = 0; i < 100000; i++){
  arr.push([-1,getRandomInt(100)]);
}

Tests:

map & sort
arr.map(r => r[1]).sort()
sort & map
arr.sort((a,b) => a[1]-b[1]).map(r => r[1])

Run results for: Array sort & map vs. map & sort

The best way to map and sort array of arrays

map & sort

sort & map