Performance Testing With Buns
Making an MMO is pretty hard. 
One of the things we are the MOST concerned about is the performance of the servers that we have to run to make the game work. A more performant and scalable server means we have to run (and pay for) less servers, and the servers we do run can support more players, more enemies, more gameplay things at one time on a single shard.
We want to support several hundreds of players on a single shard without time dilation, and we do a lot of testing to make sure that we're as on track as we can be to meet this goal. One of those tests is our version of bunnymark...