vLLM adds push-based NIXL connector to speed KV transfer for disaggregated inference
vLLM introduced a push-based NIXL connector that moves KV-transfer coordination off the decode critical path for prefill/decode disaggregated inference. In benchmarks on EC2 P5en instances with EFA, push mode reportedly reduced time-to-first-token by up to 3× and improved time-per-output-token by up to 30% for Qwen3-32B, with results varying by workload and configuration.