Feature request: Allow quokka to profile callbacks

[bugs181]

Issue description or question

As the title implies, I would like to profile async/callback code. This should be possible as seen in other tools of this nature.

Sample code

function someFn(cb) {
  setTimeout(function() { // ?.
    cb()
  }, 20 * 1000)
}

someFn(function() { // ?.

}) // ?.

Example output

Quokka.js Console Output

​​​​Quokka #1 (node: v11.0.0)​​​​

​​​​​0.719ms​​​​​ at ​​​someFn(function () { })​​​ ​quokka.js:7:0​

Code editor version

Visual Studio Code v1.30.1

OS name and version

OSX Mojave v10.14

[ArtemGovorov]

A quick note - async/await code profiling is actually supported:

(async () => {
    await (new Promise(resolve => setTimeout(() => resolve({ }), 300)))//?.
})()

Callbacks are tricky though, because we would need some more context from user to correctly understand when user wants to start/stop the timer.

For example, you may profile the code with callbacks with console.time:

We could introduce a similar construct to start/stop the timer (and display the execution time inline). For example: //?.s to start the timer, and //?.e to stop it and print the time. Would something like this work for you?

This should be possible as seen in other tools of this nature.

Could you please share what tools are you referring to?

[bugs181]

Absolutely! That's a compromise I'm willing to work with. I believe your other product Wallaby combined with Mocha will give you runtime testing/profiling for code. I abuse a Mocha test in this way to provide that information.

[bugs181]

Bump.