Here are a couple of other posts that are related to your question:
Is C++ "still" preferred in game development?Is C++ "still" preferred in game development?
What are the most commonly used programming languages?What are the most commonly used programming languages?
Am I hurting myself by not knowing C++ for game design?Am I hurting myself by not knowing C++ for game design?
Also, this isn't terribly relevant, but I thought it was interesting: Google's language performance comparison
