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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/94.0

Browser: Firefox 94

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
map & sort	62.3 Ops/sec
sort & map	28.4 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