No, that is not what he is saying at all.
Sometimes there is a tradeoff between thinking about where and how to put stuff on disk (CPU) and actual disk access. On a system like a mail server, you might expect the disk to be the bottleneck, with well below 100% CPU usage---at least, during periods when data is actually being moved on/off disk. This is precisely where, as the CPU/disk speed disparity grows, it makes sense to spend more CPU to optimise (reduce) actual disk access.
I don't know if reiserfs4 succeeds in this, but if it does it would be of particular advantage on something like a mail/news server. And, it would not be properly benchmarked if the CPU/disk speed disparity were unrealistically low.
Barak A. Pearlmutter <firstname.lastname@example.org> Hamilton Institute, NUI Maynooth, Co. Kildare, Ireland http://www-bcl.cs.may.ie/~barak/
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