User blog comment:Luperza/Server Downtime for Hotfix July 25, 2013 6AM PDT (3PM CEST)/@comment-75.46.29.147-20130725141708/@comment-6034641-20130726062755

And you have no idea that "Cooking" or "Building" doesn't just relate to code. It relates to the assets as well and automatically organizing the .pack files, compiling materials/shaders, optimizing/compressing raw level data and doing all that while setting up delta packages and checksums to be released through the patcher so that we don't have to download entire files again and only have to download partials.

Not to mention upload times to all the servers because all of them are not locally at SOE in california, and as she said some last minute testing to make sure nothing broke in the final build of all the files.