[PATCH] Improve profiling doc and make the data easier to visualise

[Ian Clatworthy]

John Arbash Meinel wrote:

> As an aside, I believe the reason for 'isinstance()' is because you
> can't serialize code objects. So when you load things from a pickle,
> they don't come back quite the same as when you put them in.

That was my initial thought as well, particularly when the original code
dumped a pickle and I tried the conversion as a separate process. I'll
go back and have another look but I know it was failing without the
isinstance() when the conversion was attempted in the same process.

Thanks for the feedback. I'll get the points you raised addressed and
resubmit.

Ian C.