SPIR-V Compression

Such specialized filters can improve compression a lot. For instance, the e8e9 transform converts relative jumps to absolute jumps in x86 EXEs, increasing compression because lots of jumps actually point to the same address.

http://mattmahoney.net/dc/dce.html#Section_571

Interesting experiment, I'm always curious about data-class-dependent filters that affect compression.

In this case, I must say that it's not really exciting to see that, after all this work, zstd level 20 is comparable. If I were to choose, I wouldn't add a complex filter (which might even bring bugs) for a 1% final gain, but YMMV.

Somewhat mis-leading graphs since higher-quality zlib compression levels weren't evaluated. Zstd is DOA thanks to Facebook's patent poison pill.

This was a fun read for sure. It's always inspiring to see someone take on a new domain, learn something and produce something functional.