cProfileV v2

I recently made some changes to cProfileV, adding the ability to immediately profile a script and run it at the same time.

It was always a personal pain point to separately output a temporary profile object before using cprofilev to visualise this information and I've been meaning to add this for a while.

This also changes how cProfileV is invoked on the command-line:

1. Simply run your python program in with the -m cprofilev flag.

   $ python -m cprofilev /path/to/python/program ...

2. Navigate to http://localhost:4000 to view the profile statistics (even while the program is still running!)

I've also added a -f flag for backward compatibility so people who like the previous method of using profile objects can continue to do so:

$ cprofilev -f /path/to/save/output

I previously wrote about how to make sense of the profile information here.