25 lines
596 B
Markdown
25 lines
596 B
Markdown
---
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title: Time taken by function
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tags: function
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expertise: beginner
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firstSeen: 2017-12-17T17:55:51+02:00
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lastUpdated: 2020-10-22T20:24:30+03:00
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---
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Measures the time it takes for a function to execute.
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- Use `console.time()` and `console.timeEnd()` to measure the difference between the start and end times to determine how long the callback took to execute.
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```js
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const timeTaken = callback => {
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console.time('timeTaken');
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const r = callback();
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console.timeEnd('timeTaken');
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return r;
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};
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```
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```js
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timeTaken(() => Math.pow(2, 10)); // 1024, (logged): timeTaken: 0.02099609375ms
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```
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