In some cases when there are lots of sounds, Gusanos can freeze for a few seconds. We are not sure why this happens, but adding “sfx_output_mode winmm” to your config.cfg file seems to fix this.
A way to test if you get this performance issue, is to catch a larpa using the manipulator in the defaut mod, hold it for around half a minute and then release it. If Gusanos stops rendering for a second or two then try the above.