Well, license problems are solved for good, so I guess this means "ITP" and not "maybe": let's state it clearly in the subject.
Here they are: (you can safely recurse: I removed the old version from there) http://cyberx.lapo.it/cygwin/bsdiff/ http://cyberx.lapo.it/cygwin/bsdiff/bsdiff-4.3-1-src.tar.bz2 http://cyberx.lapo.it/cygwin/bsdiff/bsdiff-4.3-1.tar.bz2 You can use http://cyberx.lapo.it/cygwin/ as a setup.exe source, also, thanks to genini. Example use: % time bsdiff /usr/bin/monotone.exe /usr/local/bin/monotone-0.26.exe monotone-0.25-0.26.exe.bsdiff bsdiff /usr/bin/monotone.exe /usr/local/bin/monotone-0.26.exe 31.62s user 0.20s system 86% cpu 36.972 total % ll /usr/bin/monotone.exe /usr/local/bin/monotone-0.26.exe monotone-0.25-0.26.exe.bsdiff -rwxr-xr-x 1 lapo None 7492096 Jan 1 19:31 /usr/bin/monotone.exe -rwxr-xr-x 1 lapo None 7773696 Jan 28 14:53 /usr/local/bin/monotone-0.26.exe -rw-rw-rw- 1 lapo None 1067464 Jan 28 14:55 monotone-0.25-0.26.exe.bsdiff % time bspatch /usr/bin/monotone.exe monotone-0.26.exe monotone-0.25-0.26.exe.bsdiff bspatch /usr/bin/monotone.exe monotone-0.26.exe monotone-0.25-0.26.exe.bsdiff 1.39s user 0.15s system 87% cpu 1.755 total % sha1sum /usr/local/bin/monotone-0.26.exe monotone-0.26.exe 87ae6ebd80d5eda6af07c438a1d4de9b10db7e99 */usr/local/bin/monotone-0.26.exe 87ae6ebd80d5eda6af07c438a1d4de9b10db7e99 *monotone-0.26.exe bsdiff used 126Mb for the first half or so of the time, then around 97Mb. This is in line with what "man bsdiff" states: around 17 times the oldfile size. The website more precisely states it uses max(17*old, 9*old+new). Lapo