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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2019/01/02 18:39:13 UTC

[GitHub] gianm commented on issue #6794: Query vectorization.

gianm commented on issue #6794: Query vectorization.
URL: https://github.com/apache/incubator-druid/pull/6794#issuecomment-450946134
 
 
   There's some benchmarks in the description (https://static.imply.io/gianm/vb.html) & I have also run some queries on a real cluster and seen similar speedups. Although notably, topN isn't vectorized in this patch, and contributions are welcome on that one 😄. I would expect speedup ratios there similar to groupBy, maybe a bit less since topN already has some optimizations targeted at reducing method call overhead (the monomorphic specialization system).
   
   There's some TeamCity inspections going bump because of unused stuff. Most of it is there for a reason so I'll add some comments that hopefully make the inspections happy.

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