How to fix slow code: Avoid logging everything in production: it eats resources and slows execution.
Loops matter: use optimized methods like list comprehensions in Python for speed.
Be mindful of hardware quirks like cache misses and memory fragmentation.
Understand how database queries and copy-paste operations can impact efficiency.
https://www.freecodecamp.org/news/why-your-code-is-slow-common-performance-mistakes-beginners-make/