Parallel Build not working

I have three decoupled projects ProjA, ProjB, ProjC under the root folder Proj and no dependency between them.

I have included them in root project settings.gradle. I have added org.gradle.parallel=true in gradle.properties. I am trying to run in parallel build. Its taking more time than sequential build.

I am not sure whether parallel build is working or am I missing any configuration. Please help me to run the my project in parallel build.

Do you get a warning message about parallel execution being an incubating feature?

yes . I get the warning. I am using gradle 1.4