docs(readme): refresh the benchmark table — accumulated drift (stale numbers + descriptions) found during #440

[pekkah]

While updating three rows for #440 I found the README benchmark table has drifted beyond just those rows — both numbers and prose descriptions are stale in places. A full warm re-bench would refresh the whole table.

Evidence of drift (found during #440)

• Qwen3-Coder 30B-A3B, CUDA -g -1: the row said "routed experts stream through CudaExpertSlotManager SLRU" — but the default path now auto-selects CPU-MoE (expert-cache capacity too small), a different code path. The number (29.4) was the per-token CPU-MoE rate, not SLRU. Both fixed in perf(cpu): batched CPU-FFN/MoE prefill — hoist Q6_K input re-quant, default flags on (#416) #440, but the description had been wrong for a while (predates this session — the auto-select behavior changed without a README update).
• The three CPU-expert/FFN-prefill rows were 2–3.7× stale (Coder 29.4→102.6, 27B-MTP Q4_K_M 10.0→22.0, Q5_K_M 6.2→9.6) — fixed in perf(cpu): batched CPU-FFN/MoE prefill — hoist Q6_K input re-quant, default flags on (#416) #440, but only because perf(cpu): batched CPU-FFN/MoE prefill — hoist Q6_K input re-quant, default flags on (#416) #440 happened to touch them.

The other rows (full-GPU, op-offload MoE, CPU-only, Vulkan) weren't affected by #440 and were left as-is, but they date from earlier sessions and predate later perf work — so some have likely drifted too (numbers and/or notes).

Proposed

Run the full warm sweep and reconcile every row:

pwsh scripts/bench-allrows-1k.ps1 -CudaOnly           # warm ~2K-ctx prefill
pwsh scripts/bench-allrows-1k.ps1 -CudaOnly -NearZero # near-zero-ctx decode

on the reference machine (Zen 4 12c/24t + RTX 4070 Ti), then update the table numbers and audit the per-row notes for stale claims (like the SLRU one). Same-thermal, interleaved, per the #410 protocol.

Scope note: this is the sharpi-side number refresh; the llama.cpp gap tracking lives in #405. Related: #440 (the fix that surfaced this), #405.

🤖 Generated with Claude Code