Add processor timing

[ggmarshall]

It would be nice to output the amount of total time taken for each processor block in the dsp for profiling things. (could also be a useful tool when accepting prs?)

[iguinn]

Yes, this has been on my to do list forever...Unfortunately the profiling tools are not good at recognizing which numba function is running, so this will take some work.

[ggmarshall]

I was going to suggest something more dumb/simple which is just to add a simple time.time when each processor is run and then store a dictionary of each processor in the chain with a time