Update best_s_onnx_int8/config.pbtxt

best_s_onnx_int8/config.pbtxt

@@ -21,6 +21,10 @@ output [
 instance_group [
     {
         kind: KIND_CPU
-        count: 2  # Chạy 2 instance song song trên CPU
+        count: 2
     }
 ]
+
+dynamic_batching {
+    preferred_batch_size: [1, 4, 8]
+}