Speculative Decoding on a Single RTX 4090: MTP Nearly Tripled Qwen3.6-27B

I benchmarked MTP speculative decoding for Qwen3.6-27B in llama.cpp on one 24GB RTX 4090 — it nearly tripled generation speed, and helped even on cold generation. Here's the result, why MTP isn't in mainline llama.cpp yet, and an honest note on what 'fast' does and doesn't buy you.