On 10/21/06, Tom Lane <tgl@sss.pgh.pa.us> wrote:
[snip]
> It hasn't even been tested. One thing I'd want to know about is the
> performance effect on non-Intel machines.
On Opteron 265 his test code shows SB8 (the intel alg) is 2.48x faster
for checksum and 1.95x faster for verify for the 800 * 1024 blocks of
1 KB each workload. For 100000 blocks of 8k I got simmlar results as
well.
It looks like the new code may have a larger cache footprint, so
actual performance may differ from the microbenchmark.