jizezhang commented on issue #18195:
URL: https://github.com/apache/datafusion/issues/18195#issuecomment-3538985106

   Hi @2010YOUY01 , I put out a short draft PR 
https://github.com/apache/datafusion/pull/18752 for "fixing `elapsed_compute` 
baseline metrics not counting issue". The change I made was to track 
`elapsed_compute` in `FileStream`, which is opened by `DataSourceExec`, though 
looking over the code base I saw `elapsed_compute` timers being added in 
different ways across different types of streams, thus not sure what is the 
best place to track for file scan in this case. 
   
   Also in terms of testing, I see we have tests for ensuring a metric appears 
in `explain analyze`, but in this case the metric does exist just the value 
does not seem correct. How do we usually test for this type of changes?
   
   Thank you.


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