Added Debug.logTime function for easier performance debugging

[albertdahlin]

This lets you "tag" any function for easy performance debugging. More info in this discourse thread.

Wrap any function in your code:

This will log the execution time in the console:

It is also visible in the performance timeline:

[albertdahlin]

I was thinking about renaming this function to Debug.benchmark instead, is that better?

[Tails]

Considering that this addition will take a long time to be included in an official package; how do you build this core package and include it in your environment?

[albertdahlin]

The way I use this locally is

• Replace the Debug.elm module somewhere in ~/.elm/packages or wherever they are located on your system (I use Linux)
• Remove the *.dat files in the core module (found in the parent dir to where Debug.elm is located)
• Remove elm-stuff in my project.

Then you should be able to use Debug.logTime in your project. Probably there is a better way to do this but it works on my computer ;-)

[Tails]

It compiles! That's excellent. Lifesaver!

So someone should at some point be making an "illegal" package manager for Elm that applies and unapplies core patches such as your excellent one.