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Lorbic · Jun 15, 2026

A Love Letter to the L1 Cache

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I recently spent four hours staring at a benchmark that didn’t make sense. It started while working on Derelict Facility , my grid-based game engine in Go. I was trying to tighten the main update loop, specifically the part that iterates over every entity on the map each frame. I pulled out a small benchmark to isolate the cost, and something looked wrong. I had two Go structs. They held the…

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