--- title: Parallel All the Way Down: Beyond Single-Token... description: vLLM and the Speculators library now support three parallel drafting algorithms — P-EAGLE, DFlash, and DSpark — that overcome the sequential bottleneck of... canonical: https://daily.dev/posts/parallel-all-the-way-down-beyond-single-token-generation-with-speculative-decoding-yzx2fn2fo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Parallel All the Way Down: Beyond Single-Token Generation with Speculative Decoding | daily.dev og:description: vLLM and the Speculators library now support three parallel drafting algorithms — P-EAGLE, DFlash, and DSpark — that overcome the sequential bottleneck of... og:url: https://daily.dev/posts/parallel-all-the-way-down-beyond-single-token-generation-with-speculative-decoding-yzx2fn2fo og:image: https://api.daily.dev/og/posts/yZx2fn2FO.png og:image:alt: Parallel All the Way Down: Beyond Single-Token Generation with Speculative Decoding og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Parallel All the Way Down: Beyond Single-Token Generation with Speculative Decoding **[vLLM](https://daily.dev/sources/vllm)** · 6 min read · 0 upvotes · 0 comments ## Summary vLLM and the Speculators library now support three parallel drafting algorithms — P-EAGLE, DFlash, and DSpark — that overcome the sequential bottleneck of traditional speculative decoding. Unlike auto-regressive drafters (e.g., EAGLE-3), these algorithms predict an entire block of candidate tokens in a single forward pass, decoupling drafting latency from speculation length. P-EAGLE uses block sparsification during training; DFlash injects verifier hidden states into the speculator's KV-cache via block diffusion; DSpark adds an autoregressive correction head and a confidence head to reduce wasted verification compute. All three are open-source, production-ready in vLLM, and preserve output distribution exactly via rejection sampling. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [P-EAGLE: Faster LLM inference with Parallel Speculative Decoding in vLLM](https://daily.dev/posts/p-eagle-faster-llm-inference-with-parallel-speculative-decoding-in-vllm-jnlxyxzy3) · vLLM · 1 upvotes · 0 comments - [Diving into speculative decoding training support for vLLM with Speculators v0.3.0](https://daily.dev/posts/diving-into-speculative-decoding-training-support-for-vllm-with-speculators-v0-3-0-heh3ldntg) · vLLM · 0 upvotes · 0 comments - [EAGLE 3.1: Advancing Speculative Decoding Through Collaboration Between the EAGLE Team, vLLM, and TorchSpec](https://daily.dev/posts/eagle-3-1-advancing-speculative-decoding-through-collaboration-between-the-eagle-team-vllm-and-to-ognrhklsb) · vLLM · 0 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#ai-inference](https://daily.dev/tags/ai-inference), [#vllm](https://daily.dev/tags/vllm) [View this post on daily.dev](https://daily.dev/posts/parallel-all-the-way-down-beyond-single-token-generation-with-speculative-decoding-yzx2fn2fo) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Parallel All the Way Down: Beyond Single-Token Generation with Speculative Decoding","url":"https://daily.dev/posts/parallel-all-the-way-down-beyond-single-token-generation-with-speculative-decoding-yzx2fn2fo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/parallel-all-the-way-down-beyond-single-token-generation-with-speculative-decoding-yzx2fn2fo"},"datePublished":"2026-07-28T21:33:00.592Z","dateModified":"2026-07-28T23:27:38.919Z","description":"vLLM and the Speculators library now support three parallel drafting algorithms — P-EAGLE, DFlash, and DSpark — that overcome the sequential bottleneck of...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/8fa37c56e4d9577dd00be0923405139e?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/8fa37c56e4d9577dd00be0923405139e?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"vLLM","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"vLLM","logo":"https://media.daily.dev/image/upload/s--hTxEuls9--/f_auto/v1744613054/logos/vllm","url":"https://daily.dev/sources/vllm"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/parallel-all-the-way-down-beyond-single-token-generation-with-speculative-decoding-yzx2fn2fo","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"llm,ai-inference,vllm","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"vLLM","item":"https://daily.dev/sources/vllm"},{"@type":"ListItem","position":3,"name":"Parallel All the Way Down: Beyond Single-Token Generation with Speculative Decoding"}]} ```