What’s New in Go 1.17? Performance Boosts, ARM Support, and Unsafe Enhancements
Go 1.17 brings a 5% speed increase, smaller amd64 binaries, Windows ARM64 support, pruned module graphs to cut unnecessary dependencies, and three language upgrades—including slice‑to‑array pointer conversion and new unsafe functions—plus links to full release notes and downloads.
Go 1.17 has been officially released. The new compiler introduces a different way of passing function parameters and results, delivering about a 5% performance increase and reducing amd64 binary size by roughly 2%.
The release adds support for the 64‑bit ARM architecture on Windows, enabling Go programs to run natively on more devices.
A new “pruned module graphs” feature limits the module graph to direct dependencies of Go 1.17 modules, avoiding unnecessary downloads of unrelated packages and saving development time.
Language enhancements include:
Conversion from a slice to an array pointer.
New unsafe.Add(ptr, len) function that returns the pointer advanced by len. unsafe.Slice(ptr, len) which creates a slice of type []T from a pointer *T with the specified length and capacity.
For full details see the official Release Notes and download the binaries from the Go website:
https://golang.org/doc/go1.17
https://golang.org/dl/
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