While I don't have any first hand experience with Go's performance - it is not that hard to believe it will be fast enough - it is a compiled language, so no in

While I don't have any first hand experience with Go's performance - it is not that hard to believe it will be fast enough - it is a compiled language, so no interpreter / JIT overhead like Ruby / NodeJS. Plus they try to be closer to C where it makes sense (it has pointers but no pointer math for e.g.). The synthetic language benchmarks also put it very close to gcc -O2 C performance. About the only things that need to be improved further (so I've heard) in Go are the GC, coroutine/thread scheduler and crypto performance. They are already better in 1.1 release but Crypto is still not close to OpenSSL performance.