Various tests (in C++) language.
How long does it take to compute a log, a pow, an exponent, etc? Is division slower than multiplication? There are 2 makefiles here.
make -f Makefile.gcc
make -f Makefile.icc
To better understand benchmark results, please, read my blog entry. This should be important: http://searchivarius.org/blog/problem-previous-version-intels-library-benchmark