jshmchenxi opened a new pull request #2800:
URL: https://github.com/apache/iceberg/pull/2800


   Follows #2577, use thread pool to initialize readTasks if Spark locality is 
preferred.
   Before this, the Spark plan phase could be slow as it uses single thread to 
obtain block locations of all files for this scan.
   More information could be found in [this 
comment](https://github.com/apache/iceberg/pull/2577#issue-637698205)


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