5.x SLOW - How do I speed it up?

[Arjan van Leeuwen]

On Wednesday 28 January 2004 03:18, slave-mike wrote:
> What are all the options one needs to change before doing a
> buildworld/installworld
> to make sure all the debugging features are off?

- remove the kernel debugging options, as it says
- turn off malloc debugging, e.g.
       ln -s aj /etc/malloc.conf

Arjan

>
> > NOTE TO PEOPLE WHO THINK THAT FreeBSD 5.x IS SLOW:
> >         FreeBSD 5.x has many debugging features turned on, in
> >         both the kernel and userland.  These features attempt to detect
> >         incorrect use of system primitives, and encourage loud failure
> >         through extra sanity checking and fail stop semantics.  They
> >         also substantially impact system performance.  If you want to
> >         do performance measurement, benchmarking, and optimization,
> >         you'll want to turn them off.  This includes various WITNESS-
> >         related kernel options, INVARIANTS, malloc debugging flags
> >         in userland, and various verbose features in the kernel.  Many
> >         developers choose to disable these features on build machines
> >         to maximize performance.
>
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