93a6bcb35c90d3198494cb880637beb23e15ca6b
- light_step: cap sources at 64 (was unlimited — 400+ lava cells = 250K ray-casts) - minimap: step_by(4) sampling (65K→4K grid.get calls, still every frame — no flicker) - resize(): early return if size unchanged (skip 350K element reallocation) - Clean unused mut warning - 172 FPS avg, p99 14ms (was 66 FPS, p99 180ms)
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