Re: 15.0 LONG buildworld time

Clean to clean  (I always rm -rf /usr/obj)

I can do some additional comparisons, and maybe with different machines 
as well; see my other message, I am also experimenting with frequency 
scaling, it is possible I inadvertently tripped on something (like 
setting EPP to 100).  But even there, I have NEVER seen a buildworld 
take 76,000 seconds on these machines.

On 8/15/25 17:46, Warner Losh wrote:
>
>
> On Fri, Aug 15, 2025 at 3:38 PM David Cross <david@crossfamilyweb.com> 
> wrote:
>
>     I just upgraded one of my machines to 15.0 for testing some USB
>     related
>     work (see other thread), and one thing I noticed was that AFTER
>     upgrading to 15.0 build times *doubled*.  This is unusual since the
>     *first* build is typically the longest since it has to build the new
>     toolchain before compiling, and after that it just uses the system
>     build
>     chain.
>
>
>     In my case the build time (single threaded) was 38,000 seconds on
>     14.2,
>     however after rebooting and doing a second build it shot to 76,000
>     seconds (about) -- I had rebuilt a second time since I thought the
>     existence of a 14.2 library for SSL at build time contaminated the
>     build, it didn't, but an error I got at startup from unbound made me
>     think it did.
>
>
>     It seems the GENERIC kernel in the 15.0 branch has some extra
>     debugging
>     and validation, but builds shouldn't be primarily kernel limited
>     should
>     they?  Build options are mostly stock, I add -O2, and REPTOLINE
>     options,
>     and set CPU type to my native (raptorlake).  Nothing else of note,
>     and
>     certainly have never had any other issues.
>
>
> We default to CLEAN builds at the moment. That's almost certainly it, 
> right?
>
> Or is this a clean build to clean build comparison?
>
> Warner