Horton

Re: Cost of XLogInsert CRC calculations

Manfred Koizar <mkoi-pg@aon.at>

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From: Manfred Koizar <mkoi-pg@aon.at>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: "Mark Cave-Ayland" <m.cave-ayland@webbased.co.uk>, pgsql-hackers@postgresql.org
Date: 2005-05-17T20:22:52Z
Lists: pgsql-hackers 
On Mon, 16 May 2005 12:35:35 -0400, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>Anyone want to try it with non-gcc compilers?

MS VC++ 6.0 with various predefined optimizer settings

                                2x32        64
Default (without any /O)     0.828125   0.906250
MinSize (contains /O1)       0.468750   0.593750
MaxSpeed (contains /O2)      0.312500   0.640625

Not that it really matters -- but at least this looks like another hint
that letting the compiler emulate 64 bit operations on non 64 bit
hardware is suboptimal.

Servus
 Manfred