Comment 2 for bug 898594

Here's a list of known issues:
 * http://trac.edgewall.org/wiki/TracSubversion#KnownIssues

Some other ideas:

Turn off Trac SvnMerge* plugins: it radically improved trac changeset (and source rendering) for us at work:
 * http://trac.edgewall.org/ticket/8459#comment:26

Trac database locking issues might be improved by using Sqlite write ahead log:
 * http://trac.edgewall.org/wiki/PySqlite#TheSQLitelibrary

Trac seems to be behind quite an old (slower?) version of Twisted 10.0.0 whereas twistedmatrix.com/ is served by Twisted 11.1.0
 * http://uptime.netcraft.com/up/graph?site=twistedmatrix.com