Block Diffusion restores KV-cache efficiency for parallel-decoding diffusion LMs
alec_helbling · x · 2026-09-11
- Diffusion LMs generate multiple tokens in parallel, but iterative unmasking repeatedly updates token states, limiting KV-cache reuse.
- Block Diffusion decodes blocks left-to-right while generating each block in parallel, restoring efficient caching and combining diffusion parallelism with AR-style cache efficiency.
Related event: Block Diffusion Brings KV-Cache Reuse to Diffusion LMs(2 posts)→
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