DRAFT RELEASE NOTES — Introduction to Go 1.18

Go 1.18 is not yet released. These are work-in-progress release notes. Go 1.18 is expected to be released in February 2022.

Changes to the language

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Ports

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Tools

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Go command

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gofmt

gofmt now reads and formats input files concurrently, with a memory limit proportional to GOMAXPROCS. On a machine with multiple CPUs, gofmt should now be significantly faster.

Runtime

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Compiler

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Linker

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Core library

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Minor changes to the library

As always, there are various minor changes and updates to the library, made with the Go 1 promise of compatibility in mind.

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image/draw

The Draw and DrawMask fallback implementations (used when the arguments are not the most common image types) are now faster when those arguments implement the optional draw.RGBA64Image and image.RGBA64Image interfaces that were added in Go 1.17.

syscall

The new function SyscallN has been introduced for Windows, allowing for calls with arbitrary number of arguments. As results, Syscall, Syscall6, Syscall9, Syscall12, Syscall15, and Syscall18 are deprecated in favor of SyscallN.