20FPS might be down to a specific map. Some of my maps have many patch-meshes
within the same portal area so slowdown. Some of the xonotic and nexuiz
playermodels are pretty heavy on the engine, I set their lod high usually. I
bet it's a map though. I did some code this week to help offset the grenade
(and other fragment weapon) lag. It spawns its fragments over 12 frames
rather than 1 now. So it's 100 or less fragments spawned per frame rather
than 500 or 1000 spawned in one frame. This has an effect when I played on
local host, and should have a positive effect when on the network (these
settings can be edited in one's own config.cfg or autoexec.cfg in
~/.xonotic/data/ g_balance_grenadelauncher_ (primary/secondary)
_fragments_frames
also _fragments
_radius etc (one can tweak all xonotic weapons to work best on one's setup)
Added another medeval weapon (rapier) too :)
I posted on the opengameart forum post too, in the conversation:
http://opengameart.org/forumtopic/chaosesque-anthology-opensourcefree-fps-standalone-mod-of-xonotic-released#comment-22378
I'll put in your crossbow fx soon.