[cpeterso]

Facebook's Release Engineering blog says a code change can go from commit to live in less than 60 minutes. Admittedly, they don't say how often they deploy.

https://www.facebook.com/note.php?note_id=59150988919

[lbrandy]

Code changes are easy at facebook. Messing with domains/cookies/security/static-resources/etc is more than a code change.