ComfyUI plugin claims 11.7x speedup for diffusion models on 4090

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The QuantFunc plugin uses custom low-bit CUDA kernels (NVFP4/INT4) to generate 1024px images in 0.9s on a 4090, claiming 11.7× faster than FP8. It also supports Qwen-Image, Z-Image, and Flux.2 transforms.