A simple swarm in Brevis
lein run -m brevis-fast-swarm.core
Note that these are really quite variable and super dirty, +/- 0.25 or so is normalish for that duration of sampling.
Sim time: 50.0 Time: 165.96872 FPS: 0.3012615
Sim time: 50.0 Time: 23.564976 FPS: 2.1217878
Sim time: 50.0 Time: 45.65343 FPS: 1.0952066
Sim time: 50.0 Time: 12.915947 FPS: 3.8711686