Zoltan Haindrich 7552dc49fb

Reduce amount of expression objects created during evaluations (#15552) ...

I was looking into a query which was performing a bit poorly because the case_searched was touching more than 1 columns (if there is only 1 column there is a cache based evaluator).
While I was doing that I've noticed that there are a few simple things which could help a bit:

use a static TRUE/FALSE instead of creating a new object every time
create the ExprEval early for ConstantExpr -s (except the one for BigInteger which seem to have some odd contract)
return early from type autodetection
these changes mostly reduce the amount of garbage the query creates during case_searched evaluation; although ExpressionSelectorBenchmark shows some improvements ~15% - but my manual trials on the taxi dataset with 60M rows showed more improvements - probably due to the fact that these changes mostly only reduce gc pressure.

2023-12-15 16:11:59 +05:30

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src

Reduce amount of expression objects created during evaluations (#15552)

2023-12-15 16:11:59 +05:30

pom.xml

Prepare master for Druid 29 (#15121)

2023-10-11 10:33:45 +05:30