Lunderberg commented on PR #16183:
URL: https://github.com/apache/tvm/pull/16183#issuecomment-2274004252

   Hmm, the same thing is occurring for this test case.  I made a Relax module 
that computes `x = subtract_one(add_one(x))`, for a large number of iterations. 
 (10/100/1000 iterations in the benchmarks shown below.)
   
   (Current `main`, after the FFI changes)
   
![image](https://github.com/user-attachments/assets/1d8fe24a-b062-4b4d-9187-733ebc26ec8b)
   
   (Before the FFI changes)
   
![image](https://github.com/user-attachments/assets/7ec01b1a-3fdd-44c4-bb6f-aa1264f68cae)
   
   Since the effect isn't showing up for any smaller benchmarks, next for this 
investigation will probably need to be a full model execution.


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