Helps you work out where your code is spending its time (a.k.a. a profiler).
A prior project, wimps (why is my program slow), did this too. However, wimps was more an educational tool to help people understand how sampling profilers might work. This is a more serious attempt at making a useful profiler, hence its name, swimps (serious wimps).
Looking to contribute (code, testing, money or otherwise)? Head on over to CONTRIBUTING.md.
