Weijie, what is the size (in KB) of your generated code for the aggregate operator that is doing the 20 SUM/AVG ? Also, what JDK version are you using ?
>From what I recall, Janino was faster than JDK 1.7 up to about 256 KB source code file. That's the current threshold in Drill; if the size is greater than that, Drill automatically switches to JDK compiler. Newer JDK could potentially be faster, so we would need to do the comparison again. Perhaps you should file a JIRA with your observations. There is also the complexity of the expressions. For simple expressions, my understanding is Janino is typically better. Can you provide the query pattern you used ? On Sun, Jul 30, 2017 at 6:10 AM, weijie tong <tongweijie...@gmail.com> wrote: > The compile process is long when we have 20 sum or avg expression and the > compiler is janino. But if we change the compiler to jdk，we gain lower > compile process time. It seems jdk compiler is better .If that's tue,why > not let jdk be the default one? >
