Benchmark Run Result for: char index vs charAt() vs slice() with Object

char index vs charAt() vs slice() with Object

Compare methods for testing string's beggining character.

Date tested: 4 years ago

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36

Test name	Executions per second
character index	3236445.5 Ops/sec
charAt()	3035965.5 Ops/sec
slice()	2942014.0 Ops/sec

Benchmark definition (click to collapse):

Script Preparation code:

var str = new String('foo bar baz');
var noop = Function.prototype;

Tests:

character index
if (str[0] == 'f') noop();
charAt()
if (str.charAt(0) == 'f') noop();
slice()
if (str.slice(0, 1) == 'f') noop();

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