The Golang team just released the first release candidate of Golang 1.24. At Upsun, we use Golang extensively for everything in our hot path, especially for the routing of HTTP requests throughout our infrastructure. Here is what we are looking forward to the most.
Some nice performance improvements We have not looked into these very closely yet, but they seem nice:
2-3% performance improvement across the board, driven by “a new builtin map implementation based on Swiss Tables, more efficient memory allocation of small objects, and a new runtime-internal mutex implementation”1; and Two new cgo directives (noescape and nocallback)2 that have the potential to reduce the overhead of calling C code from Go in some cases A weak pointer implementation (finally!

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Golang 1.24 introduces several notable features and improvements: a 2-3% performance boost, a new weak pointer implementation, support for post-quantum cryptography in `crypto/tls`, the `omitzero` tag for better zero value handling in `encoding/json`, and a `tool` directive in `go.mod`. The release also enhances the testing package with context support and introduces an experimental `testing/synctest` package for concurrent code testing. These updates promise better memory usage, enhanced security, and improved developer experience.

Golang 1.24 is looking seriously awesome

Encrypted Client Hello (ECH) in crypto/tls

encoding/json gets better support for zero value through the new omitzero tag

A new testing/synctest package for testing concurrent code