The authors of Seastar used to use Lwan to benchmark their HTTP server implementation. When Seastar isn't using DPDK/usermode TCP stack, and drops to the POSIX API, Lwan is still faster.
Yes. And in other news a bicycle is faster than a Ferrari with no engine
EDIT: touché! i agree!
Curious that you compare Seastar with a Ferrari: those cars are known for an internal finish that's not compatible with their price tag... and Seastar is nothing like that. It's a seriously well engineered piece of software, and it shows: its readability and code quality is superb.