TLDR Tech / Practical
DeepSeek-V4.1-Flash Sees Major Speed Gains on vLLM
Following the release of DeepSeek-V4.1-Flash, the vLLM community and Inferact implemented optimizations that resulted in a 1.9x performance increase at low concurrency and as much as a 5.3x throughput boost when handling 150 requests per second. These enhancements were achieved through model-level improvements like SWA bounded replay and KV cache compression, alongside system-level vLLM optimizations such as kernel integrations, pruned layer CUDA graphs, and multistream overlaps.
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