[R] Which language is faster for numerical computation?

[Christofer Bogaso]

Dear all, R offers integration mechanism with different programming
languages like C, C++, Fortran, .NET etc. Therefore I am curious on,
for heavy numerical computation which language is the fastest? Is
there any study? I specially want to know because, if there is some
study saying that C is the fastest language for numerical computation
then I would change some of my R code into C.

Thanks for your time.