Re: Enabling Checksums

On 3/19/13 10:05 PM, Tom Lane wrote:
> FWIW, I would argue that any tradeoffs we make in this area must be made
> on the assumption of no such acceleration.  If we can later make things
> better for Intel(TM) users, that's cool, but let's not screw those using
> other CPUs.

I see compatibility with the acceleration as a tie-breaker.  If there's 
two approaches that are otherwise about equal, such as choosing the 
exact CRC polynomial, you might as well pick the one that works faster 
with Intel's SSE.  I'll make sure that this gets benchmarked soon on a 
decent AMD system too though.  I've been itching to assemble a 24 core 
AMD box at home anyway, this gives me an excuse to pull the trigger on that.

Thanks for the summary of how you view the zlib/libpng project state.  I 
saw 4 releases from zlib in 2012, so it seemed possible development 
might still move forward there.

-- 
Greg Smith   2ndQuadrant US    greg@2ndQuadrant.com   Baltimore, MD
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