C++ vs. Groovy vs. D

C++ compiles directly to a machine's native code, allowing it to be one of the fastest languages in the world, if optimized.

Groovy builds upon the strengths of Java but has additional power features inspired by languages like Python, Ruby and Smalltalk. It makes modern programming features available to Java developers with almost-zero learning curve.

D is a language with C-like syntax and static typing. It pragmatically combines efficiency, control, and modeling power, with safety and programmer productivity.