Run your builds in a hugely underpowered VM, and wait much longer.. your regular usage will be largely unimpacted, although the builds take longer.
Source: Currently running a ~1000 package dpb(1)[1] build of my needed openbsd ports on a dual-core KVM machine hosted on a 8-9 year old amd64x2 2.2ghz. 3 Days and counting, will probably be done around next weekend.
From there, incremental updates are mostly slight, and can complete overnight from a cron job.
Out of curiosity why do you keep such an old machine around? I have found that newer machines can be had for free, and 7-year-old Xeon servers can be had for <$200 from IT recyclers.
Run your builds in a hugely underpowered VM, and wait much longer.. your regular usage will be largely unimpacted, although the builds take longer.
Source: Currently running a ~1000 package dpb(1)[1] build of my needed openbsd ports on a dual-core KVM machine hosted on a 8-9 year old amd64x2 2.2ghz. 3 Days and counting, will probably be done around next weekend.
From there, incremental updates are mostly slight, and can complete overnight from a cron job.
.. [1] https://man.openbsd.org/dpb