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Change-Id: Iccfad311a4ce034ee84482bc5dbac21eb3b8c3b6 Reviewed-on: https://go-review.googlesource.com/c/website/+/644755 LUCI-TryBot-Result: Go LUCI <[email protected]> Commit-Queue: Junyang Shao <[email protected]> Reviewed-by: Cherry Mui <[email protected]>
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| --- | ||
| title: Go 1.24 is released! | ||
| date: 2025-02-11 | ||
| by: | ||
| - Junyang Shao, on behalf of the Go team | ||
| summary: | ||
| Go 1.24 brings generic type aliases, map performance improvements, FIPS 140 | ||
| compliance and more. | ||
| --- | ||
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| Today the Go team is excited to release Go 1.24, | ||
| which you can get by visiting the [download page](/dl/). | ||
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| Go 1.24 comes with many improvements over Go 1.23. Here are some of the notable | ||
| changes; for the full list, refer to the [release notes](/doc/go1.24). | ||
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| ## Language changes | ||
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| <!-- go.dev/issue/46477 --> | ||
| Go 1.24 now fully supports [generic type aliases](/issue/46477): a type alias | ||
| may be parameterized like a defined type. | ||
| See the [language spec](/ref/spec#Alias_declarations) for details. | ||
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| ## Performance improvements | ||
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| <!-- go.dev/issue/54766, go.dev/cl/614795, go.dev/issue/68578 --> | ||
| Several performance improvements in the runtime have decreased CPU overhead | ||
| by 2–3% on average across a suite of representative benchmarks. These | ||
| improvements include a new builtin `map` implementation based on | ||
| [Swiss Tables](https://abseil.io/about/design/swisstables), more efficient | ||
| memory allocation of small objects, and a new runtime-internal mutex | ||
| implementation. | ||
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| ## Tool improvements | ||
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| - <!-- go.dev/issue/48429 --> | ||
| The `go` command now provides a mechanism for tracking tool dependencies for a | ||
| module. Use `go get -tool` to add a `tool` directive to the current module. Use | ||
| `go tool [tool name]` to run the tools declared with the `tool` directive. | ||
| Read more on the [go command](/doc/go1.24#go-command) in the release notes. | ||
| - <!-- go.dev/issue/44251 --> | ||
| The new `test` analyzer in `go vet` subcommand reports common mistakes in | ||
| declarations of tests, fuzzers, benchmarks, and examples in test packages. | ||
| Read more on [vet](/doc/go1.24#vet) in the release notes. | ||
|
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| ## Standard library additions | ||
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| - The standard library now includes [a new set of mechanisms to facilitate | ||
| FIPS 140-3 compliance](/doc/security/fips140). Applications require no source code | ||
| changes to use the new mechanisms for approved algorithms. Read more | ||
| on [FIPS 140-3 compliance](/doc/go1.24#fips140) in the release notes. | ||
| Apart from FIPS 140, several packages that were previously in the | ||
| [x/crypto](/pkg/golang.org/x/crypto) module are now available in the | ||
| [standard library](/doc/go1.24#crypto-mlkem). | ||
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| - Benchmarks may now use the faster and less error-prone | ||
| [`testing.B.Loop`](/pkg/testing#B.Loop) method to perform benchmark iterations | ||
| like `for b.Loop() { ... }` in place of the typical loop structures involving | ||
| `b.N` like `for range b.N`. Read more on | ||
| [the new benchmark function](/doc/go1.24#new-benchmark-function) in the | ||
| release notes. | ||
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| - The new [`os.Root`](/pkg/os#Root) type provides the ability to perform | ||
| filesystem operations isolated under a specific directory. Read more on | ||
| [filesystem access](/doc/go1.24#directory-limited-filesystem-access) in the | ||
| release notes. | ||
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| - The runtime provides a new finalization mechanism, | ||
| [`runtime.AddCleanup`](/pkg/runtime#AddCleanup), that is more flexible, | ||
| more efficient, and less error-prone than | ||
| [`runtime.SetFinalizer`](/pkg/runtime#SetFinalizer). Read more on | ||
| [cleanups](/doc/go1.24#improved-finalizers) in the release notes. | ||
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| ## Improved WebAssembly support | ||
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| <!-- go.dev/issue/65199, CL 603055 --> | ||
| Go 1.24 adds a new `go:wasmexport` directive for Go programs to export | ||
| functions to the WebAssembly host, and supports building a Go program as a WASI | ||
| [reactor/library](https://github.com/WebAssembly/WASI/blob/63a46f61052a21bfab75a76558485cf097c0dbba/legacy/application-abi.md#current-unstable-abi). | ||
| Read more on [WebAssembly](/doc/go1.24#wasm) in the release notes. | ||
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| --- | ||
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| Please read the [Go 1.24 release notes](/doc/go1.24) for the complete and | ||
| detailed information. Don't forget to watch for follow-up blog posts that | ||
| will go in more depth on some of the topics mentioned here! | ||
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| Thank you to everyone who contributed to this release by writing code and | ||
| documentation, reporting bugs, sharing feedback, and testing the release | ||
| candidates. Your efforts helped to ensure that Go 1.24 is as stable as possible. | ||
| As always, if you notice any problems, please [file an issue](/issue/new). | ||
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| Enjoy Go 1.24! |