Run results for: Sorted vs unsorted Array sort

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Chrome OS 14541.0.0

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Sorted with check

24K/s

Sorted without check

2K/s

Unsorted

216/s

Unsorted with check

175/s

View exact numbers

Test name	Executions per second
✓ Sorted with check	23,828 Ops/sec
Sorted without check	2,419 Ops/sec
Unsorted	216 Ops/sec
Unsorted with check	175 Ops/sec

Script Preparation code:

var arr1 = [];
for(let i = 0; i < 10000; i++) {
  arr1.push(Math.floor(Math.random() * 5000));
}
var arr2 = arr1.slice(0);
arr2.sort((a, b) => a - b);

Tests:

Unsorted
var toSort = arr1.slice(0); toSort.sort((a, b) => a - b);
Sorted with check
var toSort = arr2.slice(0); let lastEntry; let isSorted = true; for(const entry of toSort) { if(lastEntry != null && entry < lastEntry) { isSorted = false; break; } lastEntry = entry; } if(!isSorted) { toSort.sort((a, b) => a - b); }
Sorted without check
var toSort = arr2.slice(0); toSort.sort((a, b) => a - b);
Unsorted with check
var toSort = arr1.slice(0); let lastEntry; let isSorted = true; for(const entry of toSort) { if(lastEntry != null && entry < lastEntry) { isSorted = false; break; } lastEntry = entry; } if(!isSorted) { toSort.sort((a, b) => a - b); }