Performance Testing JavaScript

performance.md

Performance Testing JavaScript

Testing performance is surprisingly straightforward.

1. Start a timer
2. Run your tasks
3. Stop the timer and note how much time has elapsed

• The performance.now() method
• The console.time() and console.timeEnd() methods

var start = performance.now();
// Do some JS stuff...
var end = performance.now();

console.log('This took ' + (end - start) + 'ms to complete');

console.time('My awesome performance test!');
// Do some JS stuff...
console.timeEnd('My awesome performance test!');
// This will log "My awesome performance test!: 1234.567ms" (with the actual time, of course)

Run 10,000 times, get average