Qwen3.8 27B oQ4e-mtp restored-prefix B3 / PR1 61bd8a06

User reports Qwen3.8 oQ4e-mtp restored-prefix B3 / PR1 61bd8a06 at 8.4 t/s on an M5 Max 128GB. Setup is oMLX with oQ4e 4-bit weights and TurboQuant 4-bit KV cache, three greedy requests batched at roughly 20k / 45k / 135k prompt tokens with SSD prefix cache enabled. The 8.4 t/s is the per-row rate at the 20k row, measured at 8.35 t/s; the other rows ran 8.83 and 7.84 t/s per row, and the batch phase took 66 seconds.