Except for Haskell, OCaml, Pascal and SBCL Lisp. Java is faster than all of those (on the shootout micro benchmarks), and I'd say all of them are quite mature.
From what I can tell, on the Language Shootout, only C, C++ and Fortran beat Java.
N.B. I think I only looked at benchmarks for x64 quad core.
From what I can tell, on the Language Shootout, only C, C++ and Fortran beat Java.
N.B. I think I only looked at benchmarks for x64 quad core.