Comment by FpUser

I once had to write software that would go through whole bunch of PHP code (more than 5000 files), parse / discover certain patterns and write report with proposed fixes or same but with the fixes applied.

For whatever reasons I had to do it in Python. It was total nightmare to debug as the execution speed in debug mode was insanely slow.

I could've written it in C++ in exactly the same time and not to have any of the performance problems.