Google has released Go 1.5 with some new improvements and changes. The improvements include support for internal packages and C is finally not involved in its implementation. Therefore, runtime, compiler and linker are now written in Go itself.
In the release, the garbage collector has been re-designed. The order in which goroutines are scheduled has been changed.
As stated in the Official Release:
- The compiler and runtime are now written entirely in Go (with a little assembler). C is no longer involved in the implementation, and so the C compiler that was once necessary for building the distribution is gone.
- The garbage collector is now concurrent and provides dramatically lower pause times by running, when possible, in parallel with other goroutines.
- By default, Go programs run with GOMAXPROCS set to the number of cores available; in prior releases it defaulted to 1.
- Support for internal packages is now provided for all repositories, not just the Go core.
- The go command now provides experimental support for “vendoring” external dependencies.
- A new go tool trace command supports fine-grained tracing of program execution.
- A new go doc command (distinct from godoc) is customized for command-line use.
Download Go 1.5 from Here. It is available for Windows, Linux, and Apple OS X.