From the MC guestbook...

Quote Originally Posted by Matt Mahoney
Jan Ondrus has released an update with better and faster JPEG compression. It also fixes the bug in paq8fthis that caused it to crash on Thumbs.db. (I dont know if this fixes the paq8m bug on MFC). paq8fthis2 is here:
http://cs.fit.edu/~mmahoney/compression/

842,468 a10.jpg
716,606 a10.pjg PackJPG 2.0 (2.8 sec)
698,510 a10.jpg.paq8l -6 (21.5 sec)
698,214 a10.jpg.paq8f -6 (17.6 sec)
697,818 a10.pjg PackJPG 2.2 (1.58 sec)
674,995 a10.jpg.paq8m -6 (33.8 sec)
667,190 a10.jpg.paq8fthis -6 (44.0 sec)
660,740 a10.jpg.paq8fthis2 -6 (22.7 sec)
638,540 a10.sitx stuffit 11 (< 1 sec)

packJPG 2.2
873,261 DSCN3974.pjg
560,531 DSCN4465.pjg
402,761 DSCN5081.pjg

paq8fthis -6
848,518 dscn3974.jpg.paq8f
542,014 dscn4465.jpg.paq8f
382,161 dscn5081.jpg.paq8f

paq8fthis2 -6
843,264 dscn3974.jpg.paq8f
535,258 dscn4465.jpg.paq8f
376,310 dscn5081.jpg.paq8f

stuffit 11
834,079 DSCN3974.sitx
523,291 DSCN4465.sitx
373,662 DSCN5081.sitx