Benchmark: IndexOf vs startwith

HTML Preparation code:

<div></div>

Script Preparation code:

window.searchValue = 'Test';
var data = window.data = [];
const possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
var TOTAL_STRINGS = window.TOTAL_STRINGS = 100000;

function getRandomInt(max) {
  return Math.floor(Math.random() * max);
}

function makeRandomString(len) {
  var text = "";
  for( var i=0; i < len; i++ ) {
    text += possible.charAt(getRandomInt(possible.length));
  }
  return text;
}

while (data.length < TOTAL_STRINGS) {
  data.push(makeRandomString(getRandomInt(20)));
}

Tests:

IndexOf
var x = 0; var TOTAL_STRINGS = window.TOTAL_STRINGS; var data = window.data; var searchValue = window.searchValue; while (x < TOTAL_STRINGS) { const str = data[x]; str.toLowerCase().indexOf(searchValue.toLowerCase()) > -1; x += 1; }
Startwith
var x = 0; var TOTAL_STRINGS = window.TOTAL_STRINGS; var data = window.data; var searchValue = window.searchValue; while (x < TOTAL_STRINGS) { const str = data[x]; str.toLowerCase().startsWith(searchValue.toLowerCase()); x += 1; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
IndexOf
Startwith

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Linux; Android 10; ONEPLUS A5000) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Mobile Safari/537.36

Browser/OS: Chrome Mobile 84 on Android

View result in a separate tab

Test name	Executions per second
IndexOf	93.9 Ops/sec
Startwith	74.5 Ops/sec

IndexOf vs startwith (version: 0)

Comparing performance of: IndexOf vs Startwith

Created: 3 years ago by: Guest

Jump to the latest result

IndexOf

Startwith

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A