C:\users\thomas\desktop>esd2wim.exe --help
usage: esd2wim [-h] [--compression {none,fast,max}] [--verbose] esd_file
Convert Windows ESD images to Windows WIM images. Version v0.1
positional arguments:
esd_file path to an ESD file
optional arguments:
-h, --help show this help message and exit
--compression {none,fast,max}
configure compression (default: max)
--verbose show extra information
Created by Thomas Jones - 01/05/2019
It's best to use maximum compression, as you'll get a much smaller file with minimal time penalty. 154 second difference between the none and max options, with more than half the filesize compressed.