Josh Rosen created SPARK-7251:
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Summary: Perform sequential scan when iterating over entries in
BytesToBytesMap
Key: SPARK-7251
URL: https://issues.apache.org/jira/browse/SPARK-7251
Project: Spark
Issue Type: Improvement
Reporter: Josh Rosen
In BytesToBytesMap, {{iterator()}} iterates in order of set bits in the bitmap,
but it would be faster to iterate directly through the data pages, since this
will result in less random memory access.
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