On Fri, Apr 4, 2014 at 9:13 AM, René J.V. <[email protected]> wrote:
> On Friday April 04 2014 08:35:19 Eric A. Borisch wrote: > > > > > Here's an example with a locally compiled (and therefore run through > pbzip2 > > > as that is how I have MP set) MacPorts archive. > > > > Hmmm, how have you configured things? > I have a (manually installed, linked against system libs) pbzip2 in /usr/local/bin/pbzip2. I configure macports (on install) with './configure BZIP2=/usr/local/bin/pbzip2' > > real 0m12.084s > > > user 0m45.713s > > > sys 0m0.534s > > > > > real 0m37.223s > > > user 0m36.872s > > > sys 0m0.343s > > > > > Note the user time is up (no free lunch; there is some overhead) but real > > > or "wall" time is down by a factor of 3. (I have a 4 core 2007 machine.) > > > > Depends on how it's measured; it could also reflect the number of CPUs > used (i.e. correspond to the CPU%, 300% if you're indeed using 3 cores with > complete efficiency) :) > > R > I failed to include the fact for you that the CPUs were pegged. Granted, I have some background tasks, but pbzip2 was 380%+ in activity monitor. It doesn't scale completely linearly -- as you can see on pbzip2's web page -- but 3x is nothing to shake a stick at. - Eric
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