karlovnv commented on issue #7698:
URL: 
https://github.com/apache/arrow-datafusion/issues/7698#issuecomment-1808176924

   > it is still far from optimal
   
   I think it's a good idea to cache instances of DFSchema (and Arrow Schema as 
well). Tho most flexible way is to implement user defined SchemaCacheProvider 
(let users of datafusion decide how cache schemas).
   For instance, in our case schema is being changed many times rarely then 
data and we can cache it for a long period of time


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