Run results for: slice vs substr vs substring vs index

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4115.5 Safari/537.36 OPR/70.0.3693.0 (Edition developer)

Browser: Opera 70

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
slice	11685354.0 Ops/sec
substr	11940847.0 Ops/sec
substring	11739584.0 Ops/sec
index	5864917.0 Ops/sec

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] === ' ')

Run results for: slice vs substr vs substring vs index

Compares slice, substr and substring to each other when there is only a start index

slice

substr

substring

index