Run results for: Array.indexOf vs Object lookup small collection

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Array indexOf	2844790.0 Ops/sec
Object lookup	3374540.0 Ops/sec

Script Preparation code:

var o = {'ff1234567890121':0, 'ff1234567890122':1, 'ff1234567890123':2, 'ff1234567890124':3};
var a = ['ff1234567890121', 'ff1234567890122', 'ff1234567890123', 'ff1234567890124'];
var t = 'ff1234567890124';

Tests:

Array indexOf
var i = a.indexOf(t);
Object lookup
var i = o[t];

Run results for: Array.indexOf vs Object lookup small collection

Array indexOf

Object lookup