14 years of Samba development in 19 minutes. This is an animation how the Samba source tree grows and evolves.
In October 2007 we switched to git and did some git magic to merge Samba 3 and Samba 4 branches. This is why you see Samba 1 and 2 development in the source3 directory at the beginning. Later in October 2007 we merged the branches together and you will recognize thousands of commits first to source3 and then to source4 in just one day cause of this.