ComfyUI Node
LC Speed Boost (BETA) 🚀
BETA. Plug it into the high pass sampler only. It starts the picture at half size and grows it to full size partway through: about 2x faster, same quality. The layout follows the model's trained size, so a seed frames differently with it on. Put LC Detail Daemon on the low pass. Detail is made in the last steps. Speeds up passes that start from noise (denoise 0.9 and up). Upscale and image to image passes run as normal: their layout comes from your image. Works on Krea 2, Z-Image, Flux.2 Klein, Qwen-Image and Wan. It switches itself off on SDXL-family models and inpaint masks (the console says why). Based on SPEED (Xiao, Chao, Yariv and Wetzstein, 2026).
LC Speed Boost (BETA) 🚀
- sampler
- SAMPLER
◄autotrue►
◄grow_at_step4►
CategoryLC123/sampling
Inputs (3)
| Name | Type | Default | Description |
|---|---|---|---|
| sampler | SAMPLER | High pass sampler only. From LC Sigmas, KSamplerSelect or LC Detail Daemon. | |
| auto | BOOLEAN | true | Picks the grow step from the run's own schedule (about 2x faster, same quality). |
| grow_at_step | INT | 40–200 | Used when auto is off. The step where the picture grows to full size, counted like step_swap. 0 = every step at full size. |
Outputs (1)
| Name | Type | Description |
|---|---|---|
| SAMPLER | SAMPLER | — |