Run results for: Object Hashmap vs Array.indexOf

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 131

Operating system: Android

Device Platform: Mobile

Date tested: 3 months ago

Test name	Executions per second
Object Hash-map	16645193.0 Ops/sec
Array.indexOf	6718048.0 Ops/sec

Script Preparation code:

var testArray = ['a','b', 'c','d','e','f','g','h','i','j', 'k', 'l','m','n' ,'bar','o', 'p', 'q', 'r', 's','t','u', 'v','w','x','y', 'z'];
let i =0;

var objectHash = testArray.reduce((acc, key) => {acc[key] = i++; return acc;},{});

Tests:

Object Hash-map
const testStrFirst = 'foo'; objectHash[testStrFirst]; const testStrSecond = 'bar'; objectHash[testStrSecond]; const testStrNotMatch = 'baz'; objectHash[testStrNotMatch];
Array.indexOf
const testStrFirst = 'foo'; testArray.indexOf(testStrFirst); const testStrSecond = 'bar'; testArray.indexOf(testStrSecond); const testStrNotMatch = 'baz'; testArray.indexOf(testStrNotMatch);

Run results for: Object Hashmap vs Array.indexOf

Matching a string against more than one possibility.

Object Hash-map

Array.indexOf