LMCache: Open-Source Cache Layer Speeds Up Inference
JafarNajafov · x · 2026-07-17
LMCache is an open-source KV cache layer designed to store reusable text across GPU, CPU, disk, or even S3, making it reusable across any vLLM or SGLang instance.
- It goes beyond simple prefix caching, supporting the cross-node reuse of reusable text from any position within a prompt.
- When integrated with vLLM, the authors report achieving 3–10x lower TTFT on multi-turn QA and RAG workloads, while also significantly saving GPU compute cycles.
- It has already been adopted by Google Cloud, CoreWeave, GMI Cloud, Redis, Weka, and NVIDIA Dynamo.
- The project is licensed under Apache 2.0 and can be installed via pip install lmcache.
Related event: LMCache framed as a KV-cache layer for LLM inference(5 posts)→
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