[Bharath1234]

Well. I have just come across this one which says Unicorn to be the best performing one. Apparently, Puma proves wrong even with multiple workers.

https://gist.github.com/pbyrne/5218411

[Bjoern]

Interesting goes against directly what they claim on their own page. Its tested on a four core machine. I'm suspecting the 16 default threads were the problem, since Unicorn only ran with 4 processes not 16.

http://puma.io/

[dsrw]

1 puma worker vs 4 unicorn workers isn't a fair test on a multi core machine under MRI.