Battlefield 2 Patch
Battlefield 2 uses a typical approach to game patching by integrating the new patch data into the existing game data - as opposed to just dumping a patch file into the game installation directory. This usage model results in a lot of disk activity and generally long patch-times. We applied the 500 MB BF2 patch 1.41 to our installation (18.3 GB transferred, 77% write).
We compiled a large open source C# .NET project and measured the time it took to create the release build.