rdblue opened a new pull request, #5207:
URL: https://github.com/apache/iceberg/pull/5207

   While investigating #5206, I found that a lot of time is spent in 
`InputFile#getLength()` for manifest files during job planning. This isn't 
necessary because `ManifestFile` stored in a manifest list has the manifest 
file length. This PR avoids round-trip calls to get object lengths by passing 
the length into `FileIO.newInputFile`. This implements the improvement for S3, 
GCP, and Hadoop.


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