Run results for: slice vs substr vs substring vs index - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser: Chrome 91

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
slice	17484820.0 Ops/sec
substr	18026820.0 Ops/sec
substring	18132240.0 Ops/sec
index	9104554.0 Ops/sec

Website performance monitoring

Script Preparation code:

var example = 'there is no spoon'

Tests:

slice
var result = example.slice(10,2) ==='o '
substr
var result = example.substr(10,2) === 'o '
substring
var result = example.substring(10,12) === 'o '
index
var result1 = (example[10] === 'o') && (example[11] === ' ')