LLMLingua

[EMNLP'23, ACL'24] To speed up LLMs' inference and enhance LLM's perceive of key information, compress the prompt and KV-Cache, which achieves up to 20x compression with minimal performance loss.

microsoft
4665
258
Python
LLMLingua

LLMLingua Series | Effectively Deliver Information to LLMs via Prompt Compression

| Project Page | LLMLingua | LongLLMLingua | LLMLingua-2 | LLMLingua Demo | LLMLingua-2 Demo |

https://github.com/microsoft/LLMLingua/assets/30883354/eb0ea70d-6d4c-4aa7-8977-61f94bb87438

News

  • 🌀 [24/07/03] We’re excited to announce the release of MInference to speed up Long-context LLMs’ inference, reduces inference latency by up to 10X for pre-filling on an A100 while maintaining accuracy in 1M tokens prompt! For more information, check out our paper, visit the project page.
  • 🧩 LLMLingua has been integrated into Prompt flow, a streamlined tool framework for LLM-based AI applications.
  • 🦚 We’re excited to announce the release of LLMLingua-2, boasting a 3x-6x speed improvement over LLMLingua! For more information, check out our paper, visit the project page, and explore our demo.
  • 👾 LLMLingua has been integrated into LangChain and LlamaIndex, two widely-used RAG frameworks.
  • 🤳 Talk slides are available in AI Time Jan, 24.
  • 🖥 EMNLP’23 slides are available in Session 5 and BoF-6.
  • 📚 Check out our new blog post discussing RAG benefits and cost savings through prompt compression. See the script example here.
  • 🎈 Visit our project page for real-world case studies in RAG, Online Meetings, CoT, and Code.
  • 👨‍🦯 Explore our ‘./examples’ directory for practical applications, including LLMLingua-2, RAG, Online Meeting, CoT, Code, and RAG using LlamaIndex.

TL;DR

LLMLingua utilizes a compact, well-trained language model (e.g., GPT2-small, LLaMA-7B) to identify and remove non-essential tokens in prompts. This approach enables efficient inference with large language models (LLMs), achieving up to 20x compression with minimal performance loss.

LongLLMLingua mitigates the ‘lost in the middle’ issue in LLMs, enhancing long-context information processing. It reduces costs and boosts efficiency with prompt compression, improving RAG performance by up to 21.4% using only 1/4 of the tokens.

LLMLingua-2, a small-size yet powerful prompt compression method trained via data distillation from GPT-4 for token classification with a BERT-level encoder, excels in task-agnostic compression. It surpasses LLMLingua in handling out-of-domain data, offering 3x-6x faster performance.

🎥 Overview

Background

  • Ever encountered the token limit when asking ChatGPT to summarize lengthy texts?
  • Frustrated with ChatGPT forgetting previous instructions after extensive fine-tuning?
  • Experienced high costs using GPT3.5/4 API for experiments despite excellent results?

While Large Language Models like ChatGPT and GPT-4 excel in generalization and reasoning, they often face challenges like prompt length limits and prompt-based pricing schemes.

Motivation for LLMLingua

Now you can use LLMLingua, LongLLMLingua, and LLMLingua-2!

These tools offer an efficient solution to compress prompts by up to 20x, enhancing the utility of LLMs.

  • 💰 Cost Savings: Reduces both prompt and generation lengths with minimal overhead.
  • 📝 Extended Context Support: Enhances support for longer contexts, mitigates the “lost in the middle” issue, and boosts overall performance.
  • ⚖️ Robustness: No additional training needed for LLMs.
  • 🕵️ Knowledge Retention: Maintains original prompt information like ICL and reasoning.
  • 📜 KV-Cache Compression: Accelerates inference process.
  • 🪃 Comprehensive Recovery: GPT-4 can recover all key information from compressed prompts.

Framework of LLMLingua

Framework of LongLLMLingua

Framework of LLMLingua-2

PS: This demo is based on the alt-gpt project. Special thanks to @Livshitz for their valuable contribution.

If you find this repo helpful, please cite the following papers:

@inproceedings{jiang-etal-2023-llmlingua,
    title = "{LLML}ingua: Compressing Prompts for Accelerated Inference of Large Language Models",
    author = "Huiqiang Jiang and Qianhui Wu and Chin-Yew Lin and Yuqing Yang and Lili Qiu",
    editor = "Bouamor, Houda  and
      Pino, Juan  and
      Bali, Kalika",
    booktitle = "Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing",
    month = dec,
    year = "2023",
    address = "Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2023.emnlp-main.825",
    doi = "10.18653/v1/2023.emnlp-main.825",
    pages = "13358--13376",
}

@inproceedings{jiang-etal-2024-longllmlingua,
    title = "{L}ong{LLML}ingua: Accelerating and Enhancing {LLM}s in Long Context Scenarios via Prompt Compression",
    author = "Huiqiang Jiang and Qianhui Wu and and Xufang Luo and Dongsheng Li and Chin-Yew Lin and Yuqing Yang and Lili Qiu",
    editor = "Ku, Lun-Wei  and
      Martins, Andre  and
      Srikumar, Vivek",
    booktitle = "Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)",
    month = aug,
    year = "2024",
    address = "Bangkok, Thailand",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2024.acl-long.91",
    pages = "1658--1677",
}

@inproceedings{pan-etal-2024-llmlingua,
    title = "{LLML}ingua-2: Data Distillation for Efficient and Faithful Task-Agnostic Prompt Compression",
    author = "Zhuoshi Pan and Qianhui Wu and Huiqiang Jiang and Menglin Xia and Xufang Luo and Jue Zhang and Qingwei Lin and Victor Ruhle and Yuqing Yang and Chin-Yew Lin and H. Vicky Zhao and Lili Qiu and Dongmei Zhang",
    editor = "Ku, Lun-Wei  and
      Martins, Andre  and
      Srikumar, Vivek",
    booktitle = "Findings of the Association for Computational Linguistics ACL 2024",
    month = aug,
    year = "2024",
    address = "Bangkok, Thailand and virtual meeting",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2024.findings-acl.57",
    pages = "963--981",
}

🎯 Quick Start

1. Installing LLMLingua:

To get started with LLMLingua, simply install it using pip:

pip install llmlingua

2. Using LLMLingua Series Methods for Prompt Compression:

With LLMLingua, you can easily compress your prompts. Here’s how you can do it:

from llmlingua import PromptCompressor

llm_lingua = PromptCompressor()
compressed_prompt = llm_lingua.compress_prompt(prompt, instruction="", question="", target_token=200)

# > {'compressed_prompt': 'Question: Sam bought a dozen boxes, each with 30 highlighter pens inside, for $10 each box. He reanged five of boxes into packages of sixlters each and sold them $3 per. He sold the rest theters separately at the of three pens $2. How much did make in total, dollars?\nLets think step step\nSam bought 1 boxes x00 oflters.\nHe bought 12 * 300ters in total\nSam then took 5 boxes 6ters0ters.\nHe sold these boxes for 5 *5\nAfterelling these  boxes there were 3030 highlighters remaining.\nThese form 330 / 3 = 110 groups of three pens.\nHe sold each of these groups for $2 each, so made 110 * 2 = $220 from them.\nIn total, then, he earned $220 + $15 = $235.\nSince his original cost was $120, he earned $235 - $120 = $115 in profit.\nThe answer is 115',
#  'origin_tokens': 2365,
#  'compressed_tokens': 211,
#  'ratio': '11.2x',
#  'saving': ', Saving $0.1 in GPT-4.'}

## Or use the phi-2 model,
llm_lingua = PromptCompressor("microsoft/phi-2")

## Or use the quantation model, like TheBloke/Llama-2-7b-Chat-GPTQ, only need <8GB GPU memory.
## Before that, you need to pip install optimum auto-gptq
llm_lingua = PromptCompressor("TheBloke/Llama-2-7b-Chat-GPTQ", model_config={"revision": "main"})

To try LongLLMLingua in your scenarios, you can use

from llmlingua import PromptCompressor

llm_lingua = PromptCompressor()
compressed_prompt = llm_lingua.compress_prompt(
    prompt_list,
    question=question,
    rate=0.55,
    # Set the special parameter for LongLLMLingua
    condition_in_question="after_condition",
    reorder_context="sort",
    dynamic_context_compression_ratio=0.3, # or 0.4
    condition_compare=True,
    context_budget="+100",
    rank_method="longllmlingua",
)

To try LLMLingua-2 in your scenarios, you can use

from llmlingua import PromptCompressor

llm_lingua = PromptCompressor(
    model_name="microsoft/llmlingua-2-xlm-roberta-large-meetingbank",
    use_llmlingua2=True, # Whether to use llmlingua-2
)
compressed_prompt = llm_lingua.compress_prompt(prompt, rate=0.33, force_tokens = ['\n', '?'])

## Or use LLMLingua-2-small model
llm_lingua = PromptCompressor(
    model_name="microsoft/llmlingua-2-bert-base-multilingual-cased-meetingbank",
    use_llmlingua2=True, # Whether to use llmlingua-2
)

3. Advanced usage - Structured Prompt Compression:

Split text into sections, decide on whether to compress and its rate. Use <llmlingua></llmlingua> tags for context segmentation, with optional rate and compress parameters.

structured_prompt = """<llmlingua, compress=False>Speaker 4:</llmlingua><llmlingua, rate=0.4> Thank you. And can we do the functions for content? Items I believe are 11, three, 14, 16 and 28, I believe.</llmlingua><llmlingua, compress=False>
Speaker 0:</llmlingua><llmlingua, rate=0.4> Item 11 is a communication from Council on Price recommendation to increase appropriation in the general fund group in the City Manager Department by $200 to provide a contribution to the Friends of the Long Beach Public Library. Item 12 is communication from Councilman Super Now. Recommendation to increase appropriation in the special advertising and promotion fund group and the city manager's department by $10,000 to provide support for the end of summer celebration. Item 13 is a communication from Councilman Austin. Recommendation to increase appropriation in the general fund group in the city manager department by $500 to provide a donation to the Jazz Angels . Item 14 is a communication from Councilman Austin. Recommendation to increase appropriation in the general fund group in the City Manager department by $300 to provide a donation to the Little Lion Foundation. Item 16 is a communication from Councilman Allen recommendation to increase appropriation in the general fund group in the city manager department by $1,020 to provide contribution to Casa Korero, Sew Feria Business Association, Friends of Long Beach Public Library and Dave Van Patten. Item 28 is a communication. Communication from Vice Mayor Richardson and Council Member Muranga. Recommendation to increase appropriation in the general fund group in the City Manager Department by $1,000 to provide a donation to Ron Palmer Summit. Basketball and Academic Camp.</llmlingua><llmlingua, compress=False>
Speaker 4:</llmlingua><llmlingua, rate=0.6> We have a promotion and a second time as councilman served Councilman Ringa and customers and they have any comments.</llmlingua>"""
compressed_prompt = llm_lingua.structured_compress_prompt(structured_prompt, instruction="", question="", rate=0.5)
print(compressed_prompt['compressed_prompt'])

# > Speaker 4:. And can we do the functions for content? Items I believe are11,,116 28,.
# Speaker 0: a from Council on Price to increase the fund group the Manager0 provide a the the1 is Councilman Super Now. the special group the provide the summerman a the Jazzels a communication from Councilman Austin. Recommendation to increase appropriation in the general fund group in the City Manager department by $300 to provide a donation to the Little Lion Foundation. Item 16 is a communication from Councilman Allen recommendation to increase appropriation in the general fund group in the city manager department by $1,020 to provide contribution to Casa Korero, Sew Feria Business Association, Friends of Long Beach Public Library and Dave Van Patten. Item 28 is a communication. Communication from Vice Mayor Richardson and Council Member Muranga. Recommendation to increase appropriation in the general fund group in the City Manager Department by $1,000 to provide a donation to Ron Palmer Summit. Basketball and Academic Camp.
# Speaker 4: We have a promotion and a second time as councilman served Councilman Ringa and customers and they have any comments.

4. Learning More:

To understand how to apply LLMLingua and LongLLMLingua in real-world scenarios like RAG, Online Meetings, CoT, and Code, please refer to our examples. For detailed guidance, the documentation provides extensive recommendations on effectively utilizing LLMLingua.

5. Data collection and model training of LLMLingua-2:

To train the compressor on your custom data, please refer to our data_collection and model_training.

Frequently Asked Questions

For more insights and answers, visit our FAQ section.

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