Re: FreeBSD 6 is coming too fast

On Sun, Apr 24, 2005 at 11:14:59PM -0700, Kris Kennaway wrote:
> > >Measuring disk device performance (i.e. running a benchmark against
> > >the bare device) and filesystem performance (writing to a filesystem
> > >on the device) are very different things.
> > 
> > I wish people would stop trying to deny that we have serious work in front 
> > of us to get the VFS and disk IO figures back to where they were before.
> > 
> > there ARE slowdowns and I have seen it both with tests on teh basic 
> > hardware and throug the filesystems.  I don't know why this surproses 
> > people because we have still a lot of work to do in teh interrupt latency 
> > field for example, and I doubt that even PHK would say that there is no 
> > work left to do in geom.
> > Where we are now is closing in on "feature complete". Now we need to 
> > profile and optimise.
> 
> OK, but note that I didn't deny anything, I only questioned whether
> the OP was observing a real problem (he didn't mention disk I/O, or in
> fact any specific claim) or whether it was a coloured perception based
> on the (incorrect) assumption that gcc compilation speed was measuring
> a performance loss in FreeBSD.

According to gcc-4.0 release notes, compilation speed for C++ was
dramatically increased, up to 25% IIRC.  I think 4.0 is good
candidate for merging into HEAD.

-Kirill