[kondro]

Does this mean that the majority of the performance improvements over Puma actually come from the fact that they are using the considerably less battle-tested HTTP parser of PicoHTTPParser over the Mongrel one?

Of course, this may be mitigated by the fact that any reasonable production environment will have a web server layer over the app server/s anyway for load balancing, fail-over and exploit detection/prevention anyway.

[adamnemecek]

They actually aren't using PicoHTTPParser.

[kondro]

Whoops! My reading skills need some work.