<ul data-eligibleForWebStory="false"><li>A service that wrote millions of records daily faced latency issues after a product lead noticed laggy button responses.</li><li>The backend lead found a pre-insert validation service causing a 30ms delay per call, leading to a cumulative delay of 120ms in validations.</li><li>The validation service checked user state and limits against business rules and historical usage, prioritizing correctness over speed.</li><li>The decision to optimize the 30ms validation service inadvertently caused significant issues in the write path functionality.</li></ul>

This 30ms Optimization Broke Our Entire Write Path

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