I spoke with Lauri on IRC and we got it working. If anyone else has an use for
the results, this is the compressed log file, containing memory usage
statistics useful to debug the lag: http://www.sendspace.com/file/pjur0t

Taken with Xonotic, 1680 x 1050 full screen. All effects set to maximum,
compression disabled, and using the GIT version of Xonotic (therefore original
uncompressed high-res textures, mostly tga). I played on the map Solarium with
5 bots at maximum skill level, for about 4 minutes.