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Boost Inference Performance up to 15x on NVIDIA Blackwell Using DFlash Speculative Decoding

NVIDIA Developer Blog · Jun 23, 2026 · Engineering Insights

NVIDIA's DFlash speculative decoding boosts LLM inference performance up to 15x on Blackwell GPUs.

“Speculative decoding helps mitigate this bottleneck by using a lightweight model to draft future tokens”

NVIDIA introduced DFlash speculative decoding, claiming up to 15x faster LLM inference on Blackwell GPUs by using a lightweight drafting model to reduce the autoregressive token-generation bottleneck. This matters for low-latency, multiagent serving scenarios, but it is a vendor-specific engineering optimization rather than a broad industry-shifting signal.

nvidia inference-optimization speculative-decoding blackwell llm-serving

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