Yesterday I finished a patch I had for MozJPEG (JPEG compression improvements by @mozilla) to make it side-by-side installable with jpeg-turbo (hence available in more distributions) and discoverable at build.
Once it's in, I will merge a new option in @GIMP to enable better compression (unfortunately encoding is also slower by an order of magnitude, hence this cannot be default).
@zemarmot @mozilla @GIMP
Thanks for this improvement... :flan_heart: