Run results for: new Date from timestamp vs new Date from date-string

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

new timestamp

20.8M/s

new date-string

3.6M/s

View exact numbers

Test name	Executions per second
✓ new timestamp	20,767,956 Ops/sec
new date-string	3,635,967 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

new timestamp
new Date(1745899511871)
new date-string
new Date("2025-04-29T04:05:11.870Z")