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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
toLowerCase()	5667338.5 Ops/sec
localeCompare()	121366.6 Ops/sec
toLowerCase() FAIL	5049618.5 Ops/sec
localeCompare() FAIL	126593.6 Ops/sec
toLocaleLowerCase()	5040046.0 Ops/sec
toLocaleLowerCase() FAIL	4918863.0 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()