> Arenas are, however, unfeasible to implement in Go because it is a garbage collected language.
If you are willing to use cgo, google already implemented one for gapid.
https://github.com/google/gapid/tree/master/core/memory/aren...
Not only that, there are other garbage collected languages like D, Nim and C# that offer the language features to do arenas without having to touch any C code.
There is still so much education to do.
I can't believe we've managed to have this lengthy of a discussion about GC languages and speed without anyone mentioning rust. Has HN turned a corner?
Rust has an arena allocator too[1], but it is implemented with 165(!!!) usages of unsafe. :)