I always have an old version of the source code of Solaris' bdiff with me (https://github.com/Arkanosis/Arkonf/blob/master/tools-src/bdiff.c https://github.com/

I always have an old version of the source code of Solaris' bdiff with me (https://github.com/Arkanosis/Arkonf/blob/master/tools-src/bdiff.c https://github.com/Arkanosis/Arkonf/blob/master/tools-src/bd...), just in case. It might have changed in the meantime in OpenIndiana / Illumos. It was a very significant improvement in speed a few years ago — though with time I've gotten more RAM faster than bigger files to run diff on, and I haven't had any difficulty with the regular Linux diff for a long time.