[Xapian-discuss] 1.2.2/3 performance issue
Olly Betts
olly at survex.com
Tue Aug 31 14:04:16 BST 2010
On Tue, Aug 31, 2010 at 02:25:52PM +0200, Markus Wörle wrote:
> Do have any idea yet what change from 1.2.0 to 1.2.2 could have been caused
> the slowdown?
If this is on x86 (not x86-64), then try running configure with
--disable-sse.
1.2.1 defaults to use SSE for floating point on x86 (rather than 387
instructions) which avoids issues with excess precision. In my tests
SSE was actually faster, but I suppose that may vary between CPU models.
Cheers,
Olly
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