mfs and buildworlds on da SunFire x4600

[Oliver Fromme]

Mars G. Miro wrote:
 > Actually, it's not about having to finish building da world in da
 > smallest amount of time, it's about whether mfs would really speed
 > things up...

I've made similar tests in the past, and my conclusion is
that it's not worth it.

Using a memory disk for /usr/obj doesn't make much sense,
because soft-updates decouples the physical writes pretty
well from the build process.  On the other hand, using a
memory disk for /usr/src _might_ help a little, but it
depends on a lot of things.  Especially if you have a
speedy I/O system and plenty of RAM (so all of the files
can be cached) and /usr/src is mounted with the "noatime"
option, the difference is very small.

By the way, please stop writing "da" instead of "the".  It
looks childish and makes your mails difficult to read, so
it might prevent people from helping you.

Best regards
   Oliver

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