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Description
The FreeBSD project has some rather large CVS trees with more than 150000 changesets in ports and lots of files and directories. Therefore we need a fast VCS.
Current Implementation
SVN Implementation
Hg Implementation
Some figures are available in [http://www.keltia.net/freebsd Ollivier Robert's BSDCan paper]. Hg is fast.
Git Implementation
Git is fast. Git is often (but not always) much faster then Mercurial. As a matter of fact a major design goal of git was to be incredibly fast and so it was designed with optimization as a prime driving factor in development. Some benchmarks might be nice: http://weblogs.mozillazine.org/jst/archives/2006/11/vcs_performance.html or http://git.or.cz/gitwiki/GitBenchmarks
Some FreeBSD specific benchmarks exist on the GitConversion page.