Benchmark: String.indexOf vs Map.get vs Object lookup

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var ALPHA = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
var DIGITS = '0123456789';
var ALL_CHARS = `${DIGITS}${ALPHA}`;
var CHARACTERS = ALL_CHARS.split('');
var CHARMAP = CHARACTERS.reduce((ret, char, idx) => ret.set(char, idx), new Map());
var CHAROBJ = CHARACTERS.reduce((ret, char, idx) => {ret[char] = idx; return ret;}, {});

var LETTER = 'N';
console.log('Prep:', {ALPHA,DIGITS,ALL_CHARS,CHARMAP,CHAROBJ,LETTER});

Tests:

indexOf
var i = ALL_CHARS.indexOf(LETTER);
Map.get
var i = CHARMAP.get(LETTER);
Object Accessor
var i = CHAROBJ[LETTER];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
indexOf
Map.get
Object Accessor

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Edg/141.0.0.0

Browser/OS: Chrome 141 on Windows

View result in a separate tab

Map.get

184.2M/s

indexOf

122.1M/s

Object Accessor

71.7M/s

View exact numbers

Test name	Executions per second
✓ Map.get	184,230,224 Ops/sec
indexOf	122,116,344 Ops/sec
Object Accessor	71,705,784 Ops/sec

String.indexOf vs Map.get vs Object lookup (version: 1)

Comparing performance of: `indexOf vs Map.get vs Object Accessor`

Created: one year ago by: Guest

Go to the latest result

indexOf

Map.get

Object Accessor

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

String.indexOf vs Map.get vs Object lookup (version: 1)

Comparing performance of: indexOf vs Map.get vs Object Accessor

Created: one year ago by: Guest

Go to the latest result

indexOf

Map.get

Object Accessor

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `indexOf vs Map.get vs Object Accessor`