For you, is 2.12 seconds nearly as fast as 1.77 seconds?

For 5 of those 10 tasks, the measurements on x64 show a C program less than twice as fast as a Go program.

http://shootout.alioth.debian.org/u64q/compare.php?lang=go

Could it be that those C programs were more highly optimised by the C programmers?

http://shootout.alioth.debian.org/u64q/program.php?test=spec...

http://shootout.alioth.debian.org/u64q/program.php?test=spec...