Run results for: javascript case insensitive compare with -1 0 1 for sorting

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
built-in sort (CASE SENSITIVE)	2961.3 Ops/sec
localeCompare base sort	14.1 Ops/sec
toLowerCase simple sort	1063.8 Ops/sec
toLowerCase with manual compare sort	1074.2 Ops/sec
manual ascii compare sort	2044.3 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

function generateRandomString(length) {
  const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  let result = '';
  const charactersLength = characters.length;
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
  }
  return result;
}

function generateData(numStrings) {
  const stringArray = [];
  const minLength = 3;
  const maxLength = 20;

  for (let i = 0; i < numStrings; i += 1) {
    stringArray.push(generateRandomString(minLength + Math.floor(Math.random() * (maxLength - minLength))));
  }
  
  return stringArray;
}

const initialData = generateData(1000);

Tests:

built-in sort (CASE SENSITIVE)
const data = initialData.slice(); data.sort();
localeCompare base sort
const data = initialData.slice(); data.sort((l, r) => (l || '').localeCompare((r || ''), undefined, {sensitivity: 'base'}));
toLowerCase simple sort
const data = initialData.slice(); data.sort((a, b) => { a = a.toLowerCase(); b = b.toLowerCase(); if (a === b) { return 0; } else if (a < b) { return -1; } else { return 1; } });
toLowerCase with manual compare sort
const data = initialData.slice(); data.sort((a, b) => { a = a.toLowerCase(); b = b.toLowerCase(); for (let i = 0; i < a.length && i < b.length; i += 1) { if (a[i] !== b[i]) { if (a[i] < b[i]) { return -1; } else { return 1; } } } if (a.length == b.length) { return 0; } else if (a.length < b.length) { return -1; } else { return 1; } });
manual ascii compare sort
const data = initialData.slice(); data.sort((a, b) => { for (let i = 0; i < a.length && i < b.length; i += 1) { let l = a.charCodeAt(i); let r = b.charCodeAt(i); if (l >= 65 && l < 91) { l += 32; } if (r >= 65 && r < 91) { r += 32; } if (l !== r) { if (l < r) { return -1; } else { return 1; } } } if (a.length == b.length) { return 0; } else if (a.length < b.length) { return -1; } else { return 1; } });

Run results for: javascript case insensitive compare with -1 0 1 for sorting

built-in sort (CASE SENSITIVE)

localeCompare base sort

toLowerCase simple sort

toLowerCase with manual compare sort

manual ascii compare sort