Does ReplaySSM always make decoding faster?
No. The reported tests show no speedup at batch size one, and gains depend on batch, model and hardware. Reducing state traffic can help when memory movement is the bottleneck, but buffer-based output computation also adds work. Teams should benchmark their own workload before expecting a benefit.
Answered in
ReplaySSM Changes What Hybrid AI Models Remember Between TokensReplaySSM stores a checkpoint and recent inputs to separate state reads from updates, with benefits that depend on workload and hardware.
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