On Thu, Jan 12, 2006 at 11:27:34AM +0100, David Landgren wrote: > List, > > A while back, I mentioned that I was going to bring a six-processor box > (an HP Netserver LT 6000r) from 5.x to 6.0-STABLE, and someone asked for > some before and after benchmarks. With the recent spate of advisories, I > figured it was time to recompile the world, which gave me the chance to > perform the other side of the benchmark, to see how 6.0 performs. > > The benchmark was of course to buildworld and buildkernel.
Unfortunately this isn't valid because you're not compiling the same code using the same tools. A valid benchmark would * Use the same compiler (e.g. 5.4 gcc toolchain, on 5.4 and 6.0 kernels) * Compile the same code, e.g. a 5.4 world (you can't use a 6.0 world because there is extra bootstrapping compilation enabled when building 6.0 on a 5.4 kernel). The easiest way to do this is to extract a 5.4 world + source tree into a subdirectory, boot your chosen kernel, and chroot to the subdirectory, then time the builds in both cases. Kris
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