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by maniatico 842 days ago
I think the Optimization course by Prof. Jacco is a nice start https://web.archive.org/web/20230924064410/https://www.cs.uu... (sadly the website seems to be currently down). Basically you need a mental framework to approach optimizing software (else you might just be spinning around wasting time). I recommend reading at least lecture 1 and looking at the references on the website.

As for specific optimizations, it requires context of what software are you trying to optimize and under what circumstances. A lot of the times you are going to see that the answer to asking if certain optimizations are worth the effort is going to be 'it depends'