I don't have any immediate insight for the difference in performance you're seeing (my hunch is that it's to do with where and how memory is being allocated), b

I don't have any immediate insight for the difference in performance you're seeing (my hunch is that it's to do with where and how memory is being allocated), but I would suggest you ask about it on the Go-Nuts mailing list: https://groups.google.com/forum/?fromgroups#!forum/golang-nuts https://groups.google.com/forum/?fromgroups#!forum/golang-nu... The Go authors should be very receptive and informative on such an issue.