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4 edit cases at seed 42 on the V100, in the first picture's aspect: Qwen at its ~1 MP, H3 at 1 and 2 MP, and Pruna also at 4 MP the way its edit workflow does it (picture 1 scaled to 4 MP with lanczos first; Pruna's README says edits work best at 4 or 8 MP). The 2 MP cards come from the earlier run (same prompts and seed; times are whole warm jobs, not split). Each model set starts unloaded (ComfyUI /free, model files not in the OS cache), so its first job (outfit) includes loading everything from disk; that job then runs again warm. "Loading" = cold minus warm. "Diffusion" = the sampling steps alone, from ComfyUI's per-step progress events. RAM→VRAM is what still moves between system RAM and the GPU during a warm job (H3's 21 GB DiT and its text encoder don't both fit in 32 GB of VRAM). Click a picture to open the viewer: ← / → flips between versions, Z or click toggles 1:1 pixels.
| cold job | same job warm | loading | diffusion | text encoder | VAE decode | RAM→VRAM warm | |
|---|---|---|---|---|---|---|---|
| Qwen 2.1 base · turbo 8 steps · 1 MP | 54.2 s | 19.4 s | 34.8 s | 11.7 s (8 × 1.46) | 4.9 s | 0.5 s | 0 GB |
| H3 chroma · 1 MP | 169.0 s | 57.7 s | 111.3 s | 19.4 s (6 × 3.24) | 6.9 s | 0.8 s | 24 GB |
| H3 Pruna · 1 MP | 135.8 s | 35.0 s | 100.9 s | 21.2 s (8 × 2.65) | 4.5 s | 8.0 s | 9 GB |
| H3 Pruna · 4 MP | 167.6 s | 92.8 s | 74.8 s | 74.4 s (8 × 9.30) | 3.8 s | 8.9 s | 32 GB |
Warm job time per case (all models already loaded):
| Outfit | Sign text | Anime restyle | Two pictures (cat into shop) | |
|---|---|---|---|---|
| Qwen 2.1 base · turbo 8 steps · 1 MP | 19 s (diffusion 12) | 19 s (diffusion 12) | 19 s (diffusion 12) | 28 s (diffusion 14) |
| H3 chroma · 1 MP | 58 s (diffusion 19) | 59 s (diffusion 20) | 55 s (diffusion 19) | 75 s (diffusion 31) |
| H3 chroma · 2 MP | 73 s | 72 s | 72 s | 89 s |
| H3 Pruna · 1 MP | 35 s (diffusion 21) | 36 s (diffusion 21) | 36 s (diffusion 21) | 52 s (diffusion 36) |
| H3 Pruna · 2 MP | 41 s | 41 s | 41 s | 59 s |
| H3 Pruna · 4 MP | 93 s (diffusion 74) | 93 s (diffusion 74) | 92 s (diffusion 74) | 116 s (diffusion 95) |