Benchmark: Date.now()/new Date().getTime()/performance.now()/perf.now() - caching test - MeasureThat.net

Script Preparation code:

var timestamp = null;
var nowFetcher = Date.now
var perf = performance
var perfNowFetcher = performance.now.bind(performance)

Tests:

Date.now()
timestamp = Date.now();
new Date().getTime();
timestamp = new Date().getTime();
performance.now()
timestamp = performance.now()
perf.now()
timestamp = perf.now()
Date.now() -- direct method call
nowFetcher()
perf.now() -- direct method call
perfNowFetcher()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Date.now()
new Date().getTime();
performance.now()
perf.now()
Date.now() -- direct method call
perf.now() -- direct method call

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36

Browser/OS: Chrome 94 on Windows

View result in a separate tab

Test name	Executions per second
Date.now()	2254911.0 Ops/sec
new Date().getTime();	1379637.0 Ops/sec
performance.now()	1479874.0 Ops/sec
perf.now()	2324363.0 Ops/sec
Date.now() -- direct method call	3160977.0 Ops/sec
perf.now() -- direct method call	3599293.0 Ops/sec