In Ruby, web application servers are like gasoline in a car: the fancy stuff won’t make your car go any faster, but the nasty stuff will bring you grinding to a halt. Application servers can’t actually make your app significantly faster - no, they’re all pretty much the same and changing from one to the other won’t improve your throughput or response times by much. But it is easy to shoot yourself
![Configuring Puma, Unicorn and Passenger for Maximum Efficiency](https://cdn-ak-scissors.b.st-hatena.com/image/square/31dfa03ea23f2ed3767bbb6a32b65fb12f759000/height=288;version=1;width=512/https%3A%2F%2Fwww.speedshop.co%2Fassets%2Fposts%2Fimg%2Fbigserver.png)