Yep, running time on my tool's --version takes 50ms and funny enough processing 10k CSV lines with ~2k lines of Python code takes 100ms, so 50ms of that is just Python preparing things to run by importing 20 or so standard library modules.

> so 50ms of that is just Python preparing things to run by importing 20 or so standard library modules.

Probably a decent chunk of that actually is the Python runtime starting up. I don't know what all you `import` that isn't implied at startup, though.

Another chunk might be garbage collection at process exit.