Adaptive verification speeds block-diffusion decoding under heavy concurrent demand

DScale reallocates limited verification capacity across requests while retaining useful draft tokens and fixed-shape GPU graphs.

Research Lab
Rongjian Chen · Minxian Xu · Zhengxin Fang · Kejiang Ye · Chengzhong Xu

Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences · University of Chinese Academy of Sciences · Victoria University of Wellington · Institute of AI and Brain Sciences · University of Macau

Research Digest··3 min read
Chen and colleagues introduce DScale, a runtime system for speculative decoding that keeps DFlash’s existing block-diffusion drafter and verifies selected candidate prefixes using half the native token capacity.

DScale targets wasted computation during speculative decoding, where a small model drafts a block of tokens and a larger model verifies acceptable prefixes.

Why this paper

From Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences and 4 others

In one line

DScale improves throughput of block-diffusion speculative decoding by up to 48.8% over DFlash with only a 112K-parameter predictor.

What we could check

  • ·No code link found
  • ·No weights link found
  • ·No dataset link found
  • ✓Compute or model size stated (params Qwen3-8B)
  • ✓Limitations stated by the authors
  • ✓Reports numbers on named benchmarks (2 benchmarks)

Observed from the paper text and links we have. Absence here means we did not find it, not that it does not exist.

§

Research Digest

Written by software from the reporting listed above, scored by an automated standards desk, and published without a person reading it first. If something here is wrong, tell the editor and it will be put right.