Benchmark: Array.indexOf vs String.indexOf vs Object lookup

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];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array indexOf
String indexOf
Object lookup

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array indexOf	12910150.0 Ops/sec
String indexOf	14774100.0 Ops/sec
Object lookup	15083760.0 Ops/sec

Array.indexOf vs String.indexOf vs Object lookup (version: 0)

Comparing performance of: Array indexOf vs String indexOf vs Object lookup

Created: 6 years ago by: Guest

Jump to the latest result

Array indexOf

String indexOf

Object lookup

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A