In slide #28 it is claimed that Go is as fast as Java. I don't use Java extensively but I always had the impression that was quite performant with the highly tuned HotSpot and all even more so than Go. Are there any comparative benchmarks between Go and Java for similar-ish tasks? I get it that Go probably handles concurrency in a more elegant way but I have some doubts regarding raw performance. I am talking about the standard compiler implementation, not gccgo.