[HIVE-7219] Improve performance of serialization utils in ORC - ASF JIRA

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Details

Type: Improvement
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: 0.14.0
Fix Version/s: 0.14.0
Component/s: File Formats
Labels:
None

Description

ORC uses serialization utils heavily for reading and writing data. The bitpacking and unpacking code in writeInts() and readInts() can be unrolled for better performance. Also double reader/writer performance can be improved by bulk reading/writing from/to byte array.