It seems that the concurrent of v is much slower than go and rust

[glacial tinsel]

It seems that the concurrent of v is much slower than go and rust

[tiny stone]

I'm not sure if new spawn keyword instead of go will help

[lofty briar]

go->spawn is just surface change, preparing for go being used for coroutines (user space threads, scheduled by the runtime, like in Go)

OS threads in any language have ~ the same performance characteristics

that mostly depend on the OS/kernel, not the language and its runtime

[tiny stone]

Thanks for clarification