Github user rxin commented on the pull request:
https://github.com/apache/spark/pull/7821#issuecomment-126852974
@davies I did everything except the following:
```
Seq.tabulate(outputBitsetWords) { i =>
val bitset = if (i< bitset1Words) {
getLong(obj1, i * 8)
} else if (i == bitset1Words && bitset1Remainder > 0) {
getLong(obj1, i* 8) | getLong(obj2, 0) >>> bitset1Remainder
} else {
getLong(obj2, i - bitset1Words) <<< bitset1Remainder | getLong(obj2 i -
bitset1Words + 1) >>> bitset1Remainder
}
putLong(buf, i * 8, bitset)
}
```
I like the idea, but we can revisit this during QA to clean it up. Just
have too many other things to do right now, and based on my experience, it
takes a lot of time to get rewrite like this working. Filed a ticket to track
it: https://issues.apache.org/jira/browse/SPARK-9518
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