Browser console and calculating multiple javascript execution time differences

Question

I can easily do this:

console.time(\'mytimer\');
doSomeWork();
console.timeEnd(\'mytimer\');

But is it possible to calculate time in multiple f

Answer 1

If you need times on particular function, I guess you know that they can be achieved with argument to console.time() and console.timeEnd(). More info about it here https://developers.google.com/chrome-developer-tools/docs/console/ .

From my understanding of your question you need laps for benchmark analysis.

I have defined following methods which you can use to get lap times in milliseconds.

---

Update : Using performance api which is recommended API for such use cases.

console.lapStart = function(name){
     window[name] = window[name] || {};
     window[name].globalTimer = performance.now();
}
console.showLap = function(name){
     currTime = performance.now();
     var diff = currTime  - window[name].globalTimer;
     console.log(arguments.callee.name, diff);
}
console.lapEnd = function(name){
     currTime = performance.now();
     var diff = currTime  - window[name].globalTimer;
     console.log(arguments.callee.name, diff);
     delete window[name]
}

Note that this is rough code and should be run only in dev. Otherwise it might leave bad traces in global object and bad taste on your mouth.