NTFS New Compression Algorithms

[coderforlife]

NTFS now supports a few additional compression algorithms in Windows 10 specifically for EXE files (the compact.exe program will only apply them to EXEs at least at they are not designed to be used 'on-line' for active reading/writing). They are:

• XPRESS4K
• XPRESS8K
• XPRESS16K
• LZX

It is likely XPRESS8K is implemented as Xpress at the moment and XPRESS4K and XPRESS16K just modify the CHUNK_SIZE of the XpressDictionary but this all needs to be checked. Additionally, some option needs to be added to support changing the chunk size. The LZX option is likely what is used from WIM files and is currently non-functioning.