How to measure the execution time of a promise?

Question

I\'m trying to write a function that measures the execution time of another function:

export class Profiler {
    public measureSyncFunc(fn: () => any): P         


        

Answer 1

Have a look at timeFnPromise and the related test cases.

• target function is wrapped and executed when the wrapped function is called
• appends fulfillment / rejection handler to the underlying Promise that returns the target functions return value as "ret" and the elapsed time as "elapsedTime"
• supports arguments by passing them through to the target function

Samples Usage:

const wrappedFn = timeFnPromise(aFunctionThatReturnsAPromise)

wrappedFn()
.then((values)=>{
  const {ret, elapsedTime} = values
  console.log(`ret:[${ret}] elapsedTime:[${elapsedTime}]`)
})

Also available via NPM module jschest.