195
Python Performance: Why 'if not list' is 2x Faster Than Using len()
(blog.codingconfessions.com)
this post was submitted on 12 Apr 2025
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If you use the profiler and see that the slower operation is being used frequently, and is taking up a chunk of time deemed significant, why not swap it to the faster version?
In a simulation I'm working on that goes through 42 million rounds I spent some time profiling and going through the code that was eating up a lot of time (especially things executed all 42 million times) and trying to find some optimizations. Brought the run time down from about 10 minutes to 5 minutes.
I certainly wasn't going to start over in C++ or Rust, and if I'd started with either of those languages I would have missed out on a lot of really strong Python libraries and probably spent more time coding rather than refining the simulation.