Both Rust and Go used to have green threads i.e. stackful coroutines / fibers that installed their own execution stack and switched to it. However everyone who

Both Rust and Go used to have green threads i.e. stackful coroutines / fibers that installed their own execution stack and switched to it. However everyone who ever did green threads ended up having a lot of difficulties with stack optimization: - Go: https://docs.google.com/document/d/1wAaf1rYoM4S4gtnPh0zOlGzWtrZFQ5suE8qr2sD8uWQ/pub https://docs.google.com/document/d/1wAaf1rYoM4S4gtnPh0zOlGzW... - Rust: https://mail.mozilla.org/pipermail/rust-dev/2013-November/006314.html https://mail.mozilla.org/pipermail/rust-dev/2013-November/00... - Same for Java in the past. Now only Go is left. More on fibers woes from the C++ point of view: http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2018/p1364r0.pdf http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2018/p136...