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Javascript console.time()

console.time() can be used to measure how long a task in your code takes to run.
Calling console.time([label]) starts a new timer. When console.timeEnd([label]) is called, the elapsed time, in milliseconds, since the original .time() call is calculated and logged. Because of this behavior, you can call .timeEnd() multiple times with the same label to log the elapsed time since the original .time() call was made.

Example1

console.time('response in');
alert('Click to continue');
console.timeEnd('response in');
alert('One more time');
console.timeEnd('response in');

Output

response in: 774.967ms
response in: 1402.199ms

Example2

var elms = document.getElementsByTagName('*'); //select all elements on the page
console.time('Loop time');
for (var i = 0; i < 5000; i++) {
 for (var j = 0, length = elms.length; j < length; j++) {
 // nothing to do ...
 }
}
console.timeEnd('Loop time');

Output

Loop time: 40.716ms


Conclusion

In this page (written and validated by ) you learned about Javascript console.time() . What's Next? If you are interested in completing Javascript tutorial, your next topic will be learning about: Javascript console.trace.



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