A comparison between Windows compression and Javelin gzip and Windows did better compression.
10/05/2021 02:35 PM 5,977,552,815 File000000.END.gz
09/01/2021 10:21 AM 5,308,371,114 File000000.END.zip
Are either options used underneath the covers?
-1, --fast compress faster -9, --best compress better
Javelin Version 4.9.161
Release : 4.9.1
Component : Javelin
TDM uses GZipStream(Stream stream, CompressionMode mode); which means the default is to compress fast.
Please be aware that the new FDM version (18.104.22.168 and later) includes an embedded jre rather than run a jre installer. This will allow customers to use different jre versions that will not impact on FDM.