Large language models (LLMs) have rapidly become a foundational component of today’s consumer and enterprise applications.
Existing model-based speculative decoding methods have limitations that hinder their ability to effectively address the challenge of accelerating token generation in LLMs.
Researchers from Snowflake AI Research and Carnegie Mellon University introduce SuffixDecoding, a robust model-free approach that avoids the need for draft models or additional decoding heads.
SuffixDecoding uitlizes efficient suffix tree indices built upon previous output generations and the current ongoing inference request.
By operating on this larger reference corpus, SuffixDecoding can utilize frequency statistics in a more principled fashion to select likely candidate sequences.
The end-to-end experimental results demonstrate the strengths of the SuffixDecoding approach.
SuffixDecoding achieves competitive speedups against existing model-based speculative decoding methods across diverse workloads while being particularly well-suited for complex, multi-stage LLM pipelines.
This work presents SuffixDecoding, a model-free approach to accelerating LLM inference by utilizing suffix trees built from previous outputs.
By scaling the reference corpus rather than relying on draft models, SuffixDecoding demonstrates a robust direction for improving speculative decoding efficiency and unlocking the full potential of large language models in real-world applications.
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