Go is also a lot slower in wasm than non-gc languages due to its runtime requirements. I believe the wasm gc spec does not really help Go either so there won't be significant performance gains. It's a shame but it is what it is.
I have been playing with different languages in wasm and I settled on zig which does wasm pretty fine.
I have been playing with different languages in wasm and I settled on zig which does wasm pretty fine.