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Performance opportunities #13

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rfhh opened this issue Dec 10, 2018 · 0 comments

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rfhh commented Dec 10, 2018

callgrind flags some methods in the profile which possibly might be inlined:

7.32% SegmentIterator::next()
7.12% SegmentIterator::hasNext()
7.14% ColumnWriter::add(unsigned long)
4.20% InmemColumnReader::next()
1.30% InmemoryIterator::next() -- not sure, probably virtual
1.64% InmemoryIterator::hasNext() -- not sure, probably virtual
1.77% NewColumnTable::next()

LUMB-32, with rules=LUMB_L (much) extended by me.

The sorting routines and their usage of the heap are also high in the profile. Who's surprised, I would say.

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