mkeskells commented on PR #3746:
URL: https://github.com/apache/avro/pull/3746#issuecomment-4435636187

   I did notice that the bytes for the schema gets allocated 3 times
   
   1. in a `ByteBuffer`
   2. in a `byte[]`, copies to the header
   3. in a `String` to parse (or cache)
   
   https://github.com/apache/avro/pull/3776 removes one of these, but it seems 
a waste to have the schema stored twice in the header, both as a schema and a 
byte[]. Are there any use cases where the schema is read post construction of 
the stream?, and if so could we just store the schema and regenerate the byte[] 
if needed. This would reduce the allocation and the retained size in an 
application
   
   WDYT?


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