add time measurement with a func callback

[grosser]

func Time(name, fn func()) that reports how long something took

... I can make a PR for it unless there is a reason this is not wanted @truthbk ...

[arbll]

Hi @grosser,

I don't see anything wrong with doing this apart from a probable performance hit. Feel free to open a PR if you are still interested.

Arthur

[cyberhck]

I'd love this, most of the time we're measuring time anyway, so having a utility function like this would help a lot :slightly_smiling_face:

any idea if that PR will be merged?