sfio does compile time benchmarknig
graphviz-2.40.1/lib/sfio/features/sfio does benchmarking at compile time to decide which version of a function to use.
It does this for 3 functions: memchr memccpy mmap
This creates variations in build results across the openSUSE build workers that vary in type of system and parallel build load. See https://reproducible-builds.org/ for why this matters.
Would be nice to have a cleaner way of disabling that than the attached patch reproducible.patch