We can now use the Performance API to compute the execution time for a piece of code in JavaScript.
//capture the start time in a variable.var timeStart = performance.now();//run a time consuming task.for (counter = 0; counter //Do some processing var temp = temp + counter * counter;}//capture the current timevar timeEnd = performance.now();//measure the compute timeconsole.log("Processing time is " + (timeEnd - timeStart) + " milliseconds.")
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