ComfyUI Node Optimizes MiniMax H3 Generation Time by 30%
nnorbbi · reddit · 2026-08-07
A developer released a lightweight, dependency-free MODEL patch node for native ComfyUI MiniMax H3 models, significantly boosting generation speed using FirstBlockCache technology.
Fixed-seed benchmarks on an RTX 5090 using the INT8 ConvRot model show:
- Native attention: Time reduced from 90.64s to 60.82s, a 32.9% drop (1.49x speedup).
- SageAttention2: Time reduced from 57.96s to 40.26s, a 30.5% drop (1.44x speedup).
The node offers Safe, Fast, and Aggressive presets. This is an approximation rather than a lossless optimization, meaning exact motion trajectories might change even with the same seed. The implementation requires no additional Python packages or custom CUDA kernels and is open-sourced on GitHub under the MIT license.
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