[DtoH sync] set scheduler begin index in SD3 T2I

Reference: #11696

Author: laradipupo

src/diffusers/pipelines/stable_diffusion_3/pipeline_stable_diffusion_3.py

@@ -1058,6 +1058,12 @@ def __call__(
                 self._joint_attention_kwargs.update(ip_adapter_image_embeds=ip_adapter_image_embeds)
 
         # 7. Denoising loop
+
+        # We set the index here to remove DtoH sync, helpful especially during compilation.
+        # Check out more details here: https://github.com/huggingface/diffusers/pull/11696
+        if hasattr(self.scheduler, "set_begin_index"):
+            self.scheduler.set_begin_index(0)
+
         with self.progress_bar(total=num_inference_steps) as progress_bar:
             for i, t in enumerate(timesteps):
                 if self.interrupt: