Re: New to PostgreSQL, performance considerations

On Fri, 15 Dec 2006, Merlin Moncure wrote:

> The slower is probably due to the unroll loops switch which can
> actually hurt code due to the larger footprint (less cache coherency).

The cache issues are so important with current processors that I'd suggest
throwing -Os (optimize for size) into the mix people test.  That one may
stack usefully with -O2, but probably not with -O3 (3 includes
optimizations that increase code size).

--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD