Re: 15.0 LONG buildworld time

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