I spent some time on benchmarking Ruby LSAPI and Ruby FCGI interface, it
might be helpful for people who want to bring the best performance out
of Ruby/Rails, if you if you are interested, the result is available at
No, upload progress bar does not work with LSWS+LSAPI, it is not related
to LSAPI, but because LSWS waits for the whole request before forwarding
it to backend scripting engine. We does that because the precious
backend scripting engine don’t need to wait for the slow I/O.
On the other hand, doing upload progress bar inside Rails framework is
not a good idea to us, maybe OK for small sites, but for high traffic
sites, scalability will become a serious issue.