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New languages are coming up, it will just take long adoption cycles, given the library and surrounding tooling ecosystem has to be mature enough to go with it.

Prominent examples being Go and Perl 6.

Perl 6 especially, given how audacious the project is. There are performance issues with it currently though, from what I hear they are working to fix it soon.

I remember someone posting some Perl 6 code and C code that did the same thing. The Perl 6 code was shorter, easier to understand, more correct (Unicode), and was reported to be faster for what they were doing.

There are things which are slower, but since it is a higher level language it may be easier to try multiple algorithms one of which may be significantly faster. It also has many useful features included, which can be optimized in ways that aren't recommended for user code. (writing the algorithm in NQP) There is also a code specilizer (spesh) and a JIT.

Basically for many things it can be fast enough. Also if you profile your code and find something that is egregiously slow you should report it. Many times such things get optimized quickly.

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