Mark Kirkwood <markir@paradise.net.nz> writes:
> Right - I think the regression is caused by libc and kernel being built
> with gcc 3.4.6 and the test program being built with gcc 4.1.2.
Why do you think that? The performance of the CRC loop shouldn't depend
at all on either libc or the kernel, because they're not invoked inside
the loop.
regards, tom lane