[andix]

Shouldn't a modern compression tool, targeting a high compression rate, try to switch its compression method on the fly depending on the input data?

I have no idea about compression, just a naive thought.

[supertrope]

7-Zip can apply a BCJ filter before LZMA to more effectively compress x86 binaries. https://www.7-zip.org/7z.html. Btrfs’ transparent compression feature checks if the first block compressed well; if not it gives up for the rest of the file.

[kristofferR]

https://en.wikipedia.org/wiki/PAQ