Run results for: Array.indexOf vs String.indexOf vs Object lookup

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.0.0; SM-G965N Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36;KAKAOTALK 1607220

Browser: Chrome Mobile 67

Operating system: Android 8.0.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Array indexOf	1440294.0 Ops/sec
String indexOf	702492.9 Ops/sec
Object lookup	931154.5 Ops/sec

Script Preparation code:

var o = {'ff1234567890121':0, 'ff1234567890122':1, 'ff1234567890123':2, 'ff1234567890124':3, 'ff1234567890125':4};
var a = ['ff1234567890121', 'ff1234567890122', 'ff1234567890123', 'ff1234567890124', 'ff1234567890125'];
var s = '-ff1234567890121--ff1234567890122--ff1234567890123--ff1234567890124--ff1234567890125-';
var t = 'ff1234567890124';

Tests:

Array indexOf
var i = a.indexOf(t);
String indexOf
var i = s.indexOf('-' + t + '-');
Object lookup
var i = o[t];

Run results for: Array.indexOf vs String.indexOf vs Object lookup

Array indexOf

String indexOf

Object lookup