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The Agent Added a Cache Layer Because the Comment Said This Function Was Slow

This story is from 2026-10-20. It is preserved in the archive; the latest stories are on the live feed.

Open a random service and grep for // TODO: optimize or // this is slow . Half of those comments were written before the index existed, before the table was small, or before the query got rewritten. They sit there as ambient guilt. Hand that codebase to an agent and the comment becomes a spec. It r…

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  1. 2026-10-20 07:19 · DEV Community — AI
    The Agent Added a Cache Layer Because the Comment Said This Function Was Slow

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