Qbdiff – building and applying patches to binary files

by palaiologos on 1/20/2023, 9:34:08 PM with 4 comments

  • by f_devd on 1/21/2023, 1:41:24 AM

    I've worked on (alleged) sota delta compressors before and was suprised how much code is needed here to enable OMP parallelism & LZMA compression. It could also just be the difference in delta technique, I will definitely look through it some more if I have the time.

    For reference the tool I worked on (gdelta) is about roughly 700 sloc: https://github.com/i404788/gdelta

  • by palaiologos on 1/20/2023, 9:34:09 PM

    I'm sharing a tool that I have been working on in hopes that someone finds it useful. The tool serves the purpose of binary patching in game updates and personal incremental backups. Thanks to a different SA-IS algorithm and parallel compression of blocks, the diffing and patching is considerably faster compared to bsdiff or alternatives. This makes binary patching, in many cases, a viable option.