Run results for: IndexOf vs Includes vs lodash includes vs dictionary with large array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser: Chrome 110

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
IndexOf	20276.8 Ops/sec
Includes	19946.8 Ops/sec
lodash	17652.5 Ops/sec
dictionary	1538263.5 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

function makeid(length) {
    let result = '';
    const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    const charactersLength = characters.length;
    let counter = 0;
    while (counter < length) {
      result += characters.charAt(Math.floor(Math.random() * charactersLength));
      counter += 1;
    }
    return result;
}
var array = [];
var ver_dictionary = {};
for(let i = 0; i < 50000; i++) {
  const cur = makeid(10);
  array.push(cur);
  ver_dictionary[cur] = true;
}

Tests:

IndexOf
array.indexOf(array[Math.floor(Math.random()*50000)]) !== 1
Includes
array.includes(array[Math.floor(Math.random()*50000)])
lodash
_.includes(array, array[Math.floor(Math.random()*50000)])
dictionary
array[Math.floor(Math.random()*50000)] in ver_dictionary

Run results for: IndexOf vs Includes vs lodash includes vs dictionary with large array

Banana

IndexOf

Includes

lodash

dictionary