Where to put profiling (or even, should we put it in?)

[chrisvoncsefalvay]

I'm planning on putting in a subchapter's worth of material on profiling scripts. Do you have any suggestions on where this would be most appropriate – within the part on funx? Within a separate chapter? At error handling?

[alemelis]

Would it be reasonable to add a chapter on parallel programming?
That is the right place for profiling so that you can show differences between serial and parallel execution from different points of view