mapleFU commented on issue #35393:
URL: https://github.com/apache/arrow/issues/35393#issuecomment-1536523031

   I've written a simple script to profile:
   
   
![image](https://user-images.githubusercontent.com/24351052/236517194-a818de4c-fe2c-4eb4-a9f1-9eca72b73be7.png)
   
   I'm not familiar with PyArrow. For C++ Parquet, `Inspect` spend most memory 
and time on getting and parsing the footer. Only little memory foot print is 
used to inspect the real schema.
   
   I guess your costing is here, but I'm not sure. You can run profiler to see 
where cost these memory. 


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