Github user brkyvz commented on the issue:
https://github.com/apache/spark/pull/18676
One thing that worries me is the fact that we're paying the price of
inferring partitions and reading all files from the log twice. I tried re-using
the `metadataLog` instance in the copy of the new `MetadataLogFileIndex` as
implemented in the first commit, but not sure if that gives us any benefit.
cc @zsxwing
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