SpeCache introduces a novel speculative caching mechanism that dynamically offloads and prefetches key-value (KV) cache between GPU and CPU memory, significantly improving LLM performance on long sequences.

• Addresses critical VRAM bottleneck that limits LLMs' ability to process extended text
• Implements speculative prefetching to predict which cache entries will be needed next
• Achieves up to 2x throughput compared to existing approaches without quality degradation
• Requires no model modifications - works as a drop-in solution for existing LLM deployments

This engineering breakthrough enables more efficient deployment of LLMs in memory-constrained environments, allowing businesses to process longer documents while maintaining performance and reducing infrastructure costs.

SpeCache: Speculative Key-Value Caching for Efficient Generation of LLMs