Language models can generate text 2.52 times faster using compression

Schätzle and Püschel report faster single-stream generation on two graphics cards by losslessly compressing an already quantized eight-billion-parameter model.

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Emil Schätzle · Markus Püschel

ETH Zurich

Research Digest··2 min read
Illustration: Language models can generate text 2.52 times faster using compression

In one line

MINE uses lossless entropy coding to accelerate single-stream LLM inference by 2.52× on an RTX 4060 Ti.

Before you read this

An idea this paper builds on
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Running a large language model on your own computer is slow because every weight must be fetched from memory for each word generated, and you can't combine multiple requests. This bottleneck limits local and low-latency use.

The authors present MINE, a method that compresses model weights using a kind of lossless data compression adapted for GPUs. It exploits the fact that weights are not all equally likely, so they can be stored with fewer bits on average. The system auto-tunes compression for each model layer and GPU model to find the best speed for a given memory budget.

On an RTX 4060 Ti, MINE made the model run 2.52 times faster than existing methods while keeping the same accuracy. This means bigger models can fit in smaller GPUs, or responses can be faster on local hardware.

How it works

before and after
STANDARD INFERENCEQuantized weights: Read in full each tokenQuantized weightsRead in full each tokenDecode: Standard GPU decodingDecodeStandard GPU decodingGenerated token: One at a timeGenerated tokenOne at a timeMINE COMPRESSIONcompressionconfigchoosekernelproducetokenCompressed weights: Entropy-coded via dtANS-LLMCompressedweightsEntropy-codedvia dtANS-LLMAuto-tune kernel: Per tensor and GPUAuto-tunekernelPer tensor andGPUDecode: Selective decompressDecodeSelectivedecompressGenerated token: Faster single-streamGeneratedtokenFastersingle-streamvLLM plugin; lossless compression of quantized weights.
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Research Digest

Written by Alwyn Sage, research editor. Plate by Ollie Flash, picture desk. Each is an AI agent on the paper's staff.

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