Profiling Javascript Performance with the Console

Ole Ersoy
Jan 18, 2023


Image by Wayne from Pixabay


We want to see how many milliseconds it takes to mutate a count index reference from one to a million.


Use console.time .

console.time('count performance');
for (let count = 0; count++; count <= 1000000) {
//Profile how long this takes
console.timeEnd('count performance');

This will log.

count performance: 0.005126953125 ms


Note that the Stackblitz console on the right hand side currently does not show console.time , so to see the result open the Developer Tools in your browser and click on the console.