On 2017-09-21 09:30:31 -0400, Tom Lane wrote: > Andrew Dunstan <andrew.duns...@2ndquadrant.com> writes: > > The speed of memset is hardly going to be the dominating factor in a > > 'CREATE DATABASE' command, so we could certainly afford to change to > > plain memset calls here. > > Another thought is that it may be time for our decennial debate about > whether MemSet is worth the electrons it's printed on. I continue to > think that any modern compiler+libc ought to do an equivalent or better > optimization given just a plain memset(). If that seems to be true > for recent MSVC, we could consider putting an #if into c.h to define > MemSet as just memset for MSVC. Maybe later that could be extended > to other compilers.
+many. glibc's memset is nearly an order of magnitude faster than MemSet on my machine for medium+ length copies, and still 3-4 four times ~100 bytes. And both gcc and clang optimize way the memcpy entirely when the length is a fixed short length. Greetings, Andres Freund -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
