In addition to the improvements from the improved scheduler, use of accept4 on Linux, better GC and code generation, Brad Fitzpatrick has been giving a lot of love to the "net/http" package. Here is a small example: https://plus.google.com/u/0/115863474911002159675/posts/L3o9...

Yeah, 20% is even quite low estimate. Here's 1.0.3 vs 1.1 from just now (request worker (wrk) and Go http server running in separate machines)

https://gist.github.com/errnoh/5320784