Go 1.8 Release Notes
The latest Go release, version 1.8, arrives six months after Go 1.7. Most of its changes are in the implementation of the toolchain, runtime, and libraries. There are two minor changes to the language specification. As always, the release maintains the Go 1 promise of compatibility. We expect almost all Go programs to continue to compile and run as before.
Google today announced the release of the Go 1.8 programming language implementation that is coming with six months worth of features and changes.
Go 1.8 has a few new 64-bit x86 instructions supported, Go 1.8 now uses its new compiler back-end on all architectures (with Go 1.7 their new compiler back-end was just used on 64-bit x86) and that should yield a 20~30% performance improvement for 32-bit ARM systems. But even x86 64-bit systems should see 0~10% performance improvements with Go 1.8.