High swap use building Kyuafile on Pi3

Reply: Mark Millard : "Re: High swap use building Kyuafile on Pi3"
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From: bob prohaska <fbsd_at_www.zefox.net>
Date: Fri, 08 Sep 2023 16:14:10 UTC

While building a -current world on Pi3 using -DWITH_META_MODE it appears that
swap use is quite heavy (~2GB) well after clang finishes compiling. 

The tail of the build log shows 
Building /usr/obj/usr/src/arm64.aarch64/lib/googletest/tests/gmock_main/Kyuafile
as the last entry, suggesting something in tests is the cause.

The machine reports
FreeBSD pelorus.zefox.org 15.0-CURRENT FreeBSD 15.0-CURRENT aarch64 1500000 #49 main-n265134-4a9cd9fc22d7: Mon Sep  4 10:08:30 PDT 2023     bob@pelorus.zefox.org:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC arm64

The build command is
make -j3 -DWITH_META_MODE  buildworld > buildworld.log

This behavior seems new, in the last few weeks. 
Is it to be expected? 

Thanks for reading,

bob prohaska