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Measuring execution times

Imagine you have a asynchronous function valled asyncOperation(), and know you would like to measure the time it takes to complete this operation. We can start measuring those times with console.time([timerName]) and end it with console.timeEnd([timerName]):

console.time("async operation");
asyncOperation();
console.timeEnd("async operation");

The output of this code would be:

async operation: 128.941ms

(source)

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