Just recording the screen below (FreeBSD 11.0, amd64) for a next comparison with FreeBSD 11.1

the amd64 11.1 build completed in approximately a little less time, all in all the same as in 11.0, but on average there is more free RAM in 11.1 on the order of 8~10 GB.

the builder is now running the 11.1 i386 build, that I will stop now, and will change the config to use 2 additional builder, from 8x4 to 10x3.