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English(EN) Speculative Decoding Acceptance Rate: My LLM Got 47% Slower

如果接受率过低,推测性解码会拖慢大语言模型的速度

推测性解码是一种旨在加速大语言模型推理的技术,但如果配置不当,它会适得其反地降低性能。该方法涉及一个较小的“草稿”模型生成候选 token,然后由较大的“目标”模型进行验证。只有当接受率——目标模型接受的草稿 token 的比例——足够高以抵消草稿模型的计算成本时,这种方法才有效。在一用户的经验中,由于接受率低,一个 32B 的模型速度变慢了 47%,这凸显了根据不同工作负载衡量此接受率并优化草稿长度和模型匹配的重要性。 AI

影响 强调了大语言模型推理优化中潜在的性能陷阱,敦促仔细调整推测性解码参数。

排序理由 关于特定大语言模型推理技术的用户体验报告,并非新的模型发布或重大行业事件。

在 dev.to — LLM tag 阅读 →

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如果接受率过低,推测性解码会拖慢大语言模型的速度

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关于特定大语言模型推理技术的用户体验报告,并非新的模型发布或重大行业事件。
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报道来源 [1]

  1. dev.to — LLM tag TIER_1 English(EN) · jidonglab ·

    推测性解码接受率:我的大模型变慢了 47%

    <p>I turned on speculative decoding on a Friday afternoon expecting a free 2x. My local 32B model went from 34 tokens/sec to 18.</p> <p>Not noise. Not a warmup artifact. Consistently, reproducibly, half speed. I had added a second model to my GPU, burned VRAM for it, and made eve…