Hi, Julian Andres Klode wrote:
> Today's research has shown that rolling hashes do not perform well > on executables because of changing offsets and so on destroying the > hashes. There were no measurable space savings when adding fairly > similar firefox releases to either a casync or borg repository - > and that's on uncompressed tarballs of the latest 2 firefox uploads. For the same reason, compressors like xz apply a filter to executables before using more generic compression algorithms on them. See e.g. https://git.tukaani.org/?p=xz.git;a=blob;f=src/liblzma/simple/x86.c (and the rest of the filters in that directory). Thanks and hope that helps, Jonathan
