Is Lua Faster Than C?

As documented here, Lua is implmented in C. It can only be as fast as C, but is more likely to be slower. It can't be faster than the language of its own implementation. As long as the C code is fully optimized and uses the most appropriate algorithms.

Is Lua better than C?

The only "real" advantages of Lua over C++ is that you don't have to compile it, and there are a lot of premade Lua interpreters that you can integrate really easily. Sure, you could use C++, but then you've either gotta interpret it, or dynamically link files to your code to use it, and that's just a pain.

Is Lua the fastest programming language?

Several benchmarks show Lua as the fastest language in the realm of interpreted scripting languages. Lua is fast not only in fine-tuned benchmark programs, but in real life too. Substantial fractions of large applications have been written in Lua.