feat(comfyui): SDXL Lightning replaces FLUX as default image gen#606
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Lightheartdevs merged 3 commits intomainfrom Mar 24, 2026
Merged
feat(comfyui): SDXL Lightning replaces FLUX as default image gen#606Lightheartdevs merged 3 commits intomainfrom
Lightheartdevs merged 3 commits intomainfrom
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FLUX.1 Schnell (12B params, 23GB, 4 separate model files totaling ~34GB) was taking 5-18 minutes per image on AMD RDNA 3 due to immature ROCm kernel optimization. SDXL Lightning 4-step (3.5B params, single 6.5GB checkpoint) generates images in 5-8 seconds on the same hardware. Changes: - docker-compose.base.yml: Replace FLUX pipeline (DualCLIPLoader + UNETLoader + FluxGuidance + SamplerCustomAdvanced) with standard SDXL pipeline (CheckpointLoaderSimple + KSampler). Euler sampler, sgm_uniform scheduler, CFG 1.5, 4 steps. - Phase 11: Replace 4-file FLUX download (~34GB) with single SDXL Lightning checkpoint (~6.5GB) from ByteDance/SDXL-Lightning on HF. - Phase 13: Update background task name from flux-download to sdxl-download. - tests/test-network-timeouts.sh: Update to match new download pattern. - .env.example: Update comment. ~60x faster subsequent generations. ~5x smaller download. Quality tradeoff: lower fidelity on text rendering and complex compositions, but very solid for most use cases. Users who want FLUX quality can download it manually into the checkpoints directory. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Phase 03 (Linux): "ComfyUI + FLUX, ~34GB" → "ComfyUI + SDXL Lightning, ~6.5GB" - Phase 03 (Windows): same prompt update - ComfyUI Dockerfile: header comment updated Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Updates ComfyUI README, Open WebUI README, CATALOG.md, main README acknowledgments, FAQ, and HOW-DREAM-SERVER-WORKS to reflect the switch from FLUX.1 Schnell to SDXL Lightning 4-step. OSS-LAUNCH-CHECKLIST left as-is (historical completed task). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
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What stays the same
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make testpasses (network timeout test updated)🤖 Generated with Claude Code