My AI assistant is pushing for a full module rewrite to optimize performance. The logic looks okay, but refactoring will require a lot of time and effort, and I’m wary of technical debt. How do you decide if an AI suggestion is good enough to run with or just a hallucinated micro-optimization?

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Ask your AI agent to give justification for it's planned changes and to itemize each change and how it will affect the performance. Ask it for the top 5 performance changes that can be done without a full rewrite and also ask for validation of the proposed changes.

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That’s a great suggestion

Make a branch and test it out

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I have all suggestions like this tie back to a theoretical records processed the show the numbers for
Objects created
Object lifetime
GC Churn
Resource impact

I then question in depth the recommendations.

Sonnet and Opus are great at this type of analysis.

Is performance an issue with your application? If not, then trying to over-optimize might not be worth it, especially if there is a risk of hallucinated tech debt added to your code base. If it isn't broke, don't fix it. If it isn't causing SLA issues, don't optimize it.

I don’t have confidence in big refractors like this myself so I don’t blame you

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