I use 7zip a decent amount. My only nit with it is its tendency to create badly fragmented files on compress. For large files you can be looking at 1000+ frag

I use 7zip a decent amount. My only nit with it is its tendency to create badly fragmented files on compress. For large files you can be looking at 1000+ fragments. Been meaning to go thru the code and find where it is writing out the compress and add a bit of a buffer before write. That should let most filesystems allocate better. It may be also closing/opening the write file too much. But I have not dug into it.