Update app.py

app.py

@@ -112,8 +112,13 @@ def get_ort_session(model_key: str) -> ort.InferenceSession:
     spec = MODEL_PRESETS[model_key]
     onnx_path = resolve_model_path(spec.onnx_path)
 
+    options = ort.SessionOptions()
+    options.intra_op_num_threads = 1
+    options.inter_op_num_threads = 1
+
     sess = ort.InferenceSession(
         onnx_path,
+        sess_options=options,
         providers=["CPUExecutionProvider"],
     )
     _SESSIONS[model_key] = sess