On mån, 2010-11-29 at 13:10 -0500, Tom Lane wrote:
> Rolling in calloc in place of
> malloc/memset made no particular difference either, which says that
> Fedora 13's glibc does not have any optimization for that case as I'd
> hoped.
glibc's calloc is either mmap of /dev/zero or malloc followed by memset.