Run rootbld on memory?
I think that in case of having plenty of unused memory it's probably better idea use it instead the hard disk for something like rootbld.
Since I mount /tmp as tmpfs, I thought that doing a little workaround on 'abuild' would be enough, but then 'abuild-rmtemp' complains because it is not a valid path.
Altought this can achevieded with little customization I wonder if it could be an integrated option. In that case, instead of require a tmpfs mountpoint already available on the system, it could mount the '/var/tmp/abuild.XXXXiHMEOI/' as a tmpfs itself.