Run results for: Array.includes vs Dictionary lookup

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_7_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/133.4 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 17

Operating system: iOS 17.7.2

Device Platform: Mobile

Date tested: one year ago

Dictionary lookup

1.1M/s

Array.includes

1.1M/s

View exact numbers

Test name	Executions per second
✓ Dictionary lookup	1,138,981 Ops/sec
Array.includes	1,102,920 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>

Script Preparation code:

var myArr = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
var myDict = _.keyBy(myArr);

Tests:

Array.includes
if (myArr.includes('m')) { console.log("array has 'm'"); }
Dictionary lookup
if (myDict['m']) { console.log("dict has 'm'"); }