Pith Number

pith:SIM6TG3O

pith:2026:SIM6TG3OBTWZ7JCSRYREGR24C3

not attested not anchored not stored refs pending

SpecBlock: Block-Iterative Speculative Decoding with Dynamic Tree Drafting

Fan Deng, Hao Chen, Jiajie Xu, Jian Yang, Jiarun Liu, Jia Zhu, Qiang Xu, Weijie Shi, Xiangjun Huang, Xiaofang Zhou, Yaguang Wu, Yehong Xu

SpecBlock accelerates LLM inference by generating blocks of dependent tokens iteratively with hidden-state inheritance and dynamic branching.

arxiv:2605.07243 v2 · 2026-05-08 · cs.CL

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\pithnumber{SIM6TG3OBTWZ7JCSRYREGR24C3}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Experiments show that SpecBlock improves mean speedup by 8-13% over EAGLE-3 at 44-52% of its drafting cost, and cost-aware adaptation extends this lead to 11-19%.

C2weakest assumption

That the layer-wise hidden-state shift within blocks and selective inheritance across blocks will preserve sufficient path dependence to keep acceptance rates high enough to offset the added mechanisms, without the rank head or mask introducing new training-inference mismatches.

C3one line summary

SpecBlock achieves 8-19% higher speedup than EAGLE-3 in LLM speculative decoding by using repeated block expansions with hidden-state inheritance, a dynamic rank head, and a valid-prefix training mask.

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-22T02:04:42.060356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9219e99b6e0ced9fa4528e2243475c16c2e450882845b14915eb57663c1e3550

Aliases

arxiv: 2605.07243 · arxiv_version: 2605.07243v2 · doi: 10.48550/arxiv.2605.07243 · pith_short_12: SIM6TG3OBTWZ · pith_short_16: SIM6TG3OBTWZ7JCS · pith_short_8: SIM6TG3O

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/SIM6TG3OBTWZ7JCSRYREGR24C3 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9219e99b6e0ced9fa4528e2243475c16c2e450882845b14915eb57663c1e3550

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26629a6a38f26d2cec8f5bc8d534060fe4fdc55871d7b9049aff8f3a1f22fc8d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-05-08T04:59:48Z",
    "title_canon_sha256": "5bff5a50ecbee5f77c9aecdd5baf193b926eb9723deb9830a2e24616d150909b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.07243",
    "kind": "arxiv",
    "version": 2
  }
}