Sometimes, performance just doesn't matter. If I make some codepath in Ruff 10x faster, but no one ever hits it, I'm sure it could get some likes on Twitter, but the impact on users would be meaningless.
And yet, it's good to care about performance everywhere, even when it doesn't matter. Caring about performance is cultural and contagious. Small wins add up. Small losses add up even more.
Recent articles
- My review of Claude's new Code Interpreter, released under a very confusing name - 9th September 2025
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- GPT-5 Thinking in ChatGPT (aka Research Goblin) is shockingly good at search - 6th September 2025