Run results for: Javascript: Case insensitive string comparison performance 2 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36

Browser: Chrome 101

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
toLowerCase()	6761533.0 Ops/sec
localeCompare()	152323.4 Ops/sec
toLowerCase() FAIL	5928087.0 Ops/sec
localeCompare() FAIL	157196.7 Ops/sec
toLocaleLowerCase()	2154966.8 Ops/sec
toLocaleLowerCase() FAIL	2201566.2 Ops/sec

Script Preparation code:

var a = "John Doe"
var b = "john doe"
var c = "john smith"
var o = {
    sensitivity: 'base'
}

Tests:

toLowerCase()
a.toLowerCase() === b.toLowerCase()
localeCompare()
a.localeCompare(b,undefined,o)
toLowerCase() FAIL
c.toLowerCase() === b.toLowerCase()
localeCompare() FAIL
c.localeCompare(b,undefined,o)
toLocaleLowerCase()
a.toLocaleLowerCase() === b.toLocaleLowerCase()
toLocaleLowerCase() FAIL
c.toLocaleLowerCase() === b.toLocaleLowerCase()