Time your functions

Sometimes we want to time our functions and see how long they take.

Here’s the traditional way:

const start = new Date().getTime()

{
  ... some logic
}

const end = new Date().getTime();

console.log(end - start);

Simple. We get the time before we execute our logic. Get the time after. Get the difference between those two. That’s our function execution.

Not bad.

And then there’s console.time.

Console.time

console.time("function1");

{
  ... some logic
}

console.timeEnd("function1");

Example output:

function1: 6054.14599609375ms

Bam

“But Dan, we use a different logging library on our backend. We don’t use the console!”

Then use Moment

const startTime = moment()

...

const duration = moment().diff(startTime, 'seconds')

customLogger.log(`function duration: ${duration}`)

Bam