[marianoguerra]

Until wasm-gc was standardized in wasm 3.0 all garbage collected languages compiled their own garbage collector to wasm, so in a sense you always could.

Unless by high performance you mean something more specific.

With wasm-gc you get the GC "for free" (from the host), you can still write your own if you want but you loose the interoperability that wasm-gc solves.