Merge x-attentions from Doggettx fork #1
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Run attention in a loop to allow for much higher resolutions (over 1920x1920 on a 3090)
Correction to comment
Better memory handling for model.decode_first_stage so it doesn't crash anymore after 100% rendering
Old version gave incorrect free memory results causing in crashes on edge cases.
Set model to half in txt2img and img2img for less memory usage.
Forgot to comment out debug info
Technically you could run at higher steps as long as the resolution is dividable by the steps but you're going to run into memory issues later on anyhow.
Improves performance and is no longer needed.
Significant performance boost at higher resolutions when running in auto_cast or half mode on 3090 went from 1.13it/s to 1.63it/s at 1024x1024 Will also allow for higher resolutions due to sigmoid fix and using half memory
Performance boost and fix sigmoid for higher resolutions
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