Update app.py

app.py

@@ -149,7 +149,7 @@ opt.colors = [
     # '#FECAC0',
 ]
 opt.excluded_keys = ['inpainting_mode', 'is_running', 'active_palettes', 'current_palette', 'model']
-opt.prep_time = 3
+opt.prep_time = -3
 
 
 ### Shared memory hack for ZeroGPU