Update app.py

Apply optimizations

app.py

@@ -20,7 +20,12 @@ def load_pipeline(model):
         else AutoPipelineForImage2Image
     )
 
-    return pipeline_type.from_pretrained(model)
+    return pipeline_type.from_pretrained(
+        model,
+        torch_dtype=torch.float16,
+        use_safetensors=True,
+        variant="fp16"
+    )
 
 
 load_pipeline(DEFAULT_MODEL).to("cuda")