Lever × metric matrix

Each row is one lever, each column one metric, and each cell the lever's measured change from the baseline (two colocated instances of four GPUs, prefill-priority batching, reserved KV, BF16) on the same workload and device. Blue is better and vermillion worse, whichever way the metric runs; the arrows say which way it moved and roughly how far. Capacity metrics (goodput, throughput, cost, energy) are at each configuration's own capacity; latencies at the workload's reference load.