MLX_BUN_FILL_TRACE=1 — cache-alignment assertions + per-event logging on the engine's fill path. Off by default (the invariant it checks is the easiest bug in the feature, and the check costs a JS compare).
MLX_BUN_FILL_TRACE=1 — cache-alignment assertions + per-event logging on the engine's fill path. Off by default (the invariant it checks is the easiest bug in the feature, and the check costs a JS compare).