Why compile kotlin with jack&jill support is too slow?

Kotlin 1.1 now is support android jack&jill,but complie project code is too slow。
Just edit one line code will spend tow minute to recompile

The Jack support added in Kotlin 1.1 has no effect on compile performance. The only thing that changed is that Kotlin now correctly integrates with the Gradle tasks for compiling Java which are created when the Jack support is enabled.

To improve compilation times, please make sure that you have incremental compilation and the Gradle daemon enabled.