I don’t often run into things where it surprises me how easy a solution is. Much less so with Javascript. This quick tip may be for you.
Recently I had some performance issues with runtime javascript taking a long time. You can use the following commands to check how long it takes for something to run :
console.time('someFunction');
someFunction(); // or some code
console.timeEnd('someFunction');
The console neatly spits out the amount of miliseconds it took. Nice.