On tor, 2010-11-18 at 21:37 +0200, Heikki Linnakangas wrote:
> Have you done any performance testing? Functions like text_cmp can be
> a hotspot in sorting, so any extra overhead there might be show up in
> tests.
Without having optimized it very much yet, the performance for a 1GB
ORDER BY is
* without COLLATE clause: about the same as without the patch
* with COLLATE clause: about 30%-50% slower
I can imagine that there is some optimization potential in the latter
case. But in any case, it's not awfully slow.
