1. Built-in function
min, max, and clear. You know, like in all other normal programming languages.2. Experimental fix for the loop variable capture, one of the most common Go mistakes.
3. Profile-guided optimization is now stable. The Go compiler itself now uses it to make its code 10% faster.
4. Structured logging, with both human-readable and JSON output. For me personally it 100% replaces any third-party logging libraries.
5. Generic functions for slices and maps.
6. WASI support. WASI is the standard of defining system calls in WebAssembly.
The release notes draft:
https://tip.golang.org/doc/go1.21
That's a short list but every item on it is amazing. I hope they'll pick enums (or union types, about the same thing, as Rust shows) next, the most requested Go feature at the moment.
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