ingo@freguntu:~/Frege/frege$ time java -jar fregec.jar -version
3.23.900
0:00.22 62016k
ingo@freguntu:~/Frege/frege$ ls -l fregec.jar -rw------- 1 ingo ingo 33426802 Mär 6 12:32 fregec.jar foo = (\a -> \b -> (a+b)*(a-b)) :: Num z => z -> z -> z
When you don't need the JVM, by all means, use GHC or some other native Haskell compiler! You'll have more language extensions, libraries, and your program will be faster and use less memory in most cases.