edwkar
Any psychiatrist worth his salt, will primarly prescribe drugs as a means to help people cope, while working on the actual underlying causes. Indeed, in many cases, using drugs in the treatment may be the only option to make the patient's day-to-day life bearable. Drugs may also be essential for allowing the treatment team to examine, possibly very problematic, underlying issues.
Also, a SSRI, for instance, can of course not "treat" someone of a clinical depression; you will virtually always need professional cause-oriented therapy to get better. Most patients know this, or will realize it as they experience how their meds work.
Finally, there are some mental disorders, and many individual cases, that require constant medication, despite of the quality of the other treatment given. For example, full-fleged bi-polar disorder, where a manic or a depressive episode may have very severe consequences.
That being said, if your code is mostly IO-bound or calls into foreign-language libraries, PyPy's speedup of the Python code of course won't help much with your wall time.
Also, yeah, read the entire thing! You could skip some sections, but I would advice you to mostly move linearly from the start.