Speed Up for Ant / 加速 Ant 編譯

make -j 可以有效利用多核 CPU 來平行編譯程式碼

>man make
-j [jobs], --jobs[=jobs]
Specifies the number of jobs (commands) to run simultaneously.  If there is more than one -j option, the last one is effective.  If the -j option is given without an argument, make will not limit the number of jobs that can run simultaneously.

ant 之於 java，就如同 make 之於 c/c++

ant 應該也有類似的作法 ?
可以使用 
http://ant.apache.org/manual/CoreTasks/parallel.html

不過，跟 make -j 一樣要小心使用，以免非預期的事情發生...