Did they really get such a performance boost (x6) over standard coroutine implementation, or was it ...

# coroutines

[voddan]

Did they really get such a performance boost (x6) over standard coroutine implementation, or was it because of the single-threaded implementation?

[Vsevolod Tolstopyatov [JB]]

I’ve carefully analyzed these benchmarks.
The first improvement is achieved by narrowing responsibility scope:
the channel becomes single-producer/single consumer, close and select support is dropped. In general, it’s a good idea to write very specialized solutions for high-performance code, but such solutions are rarely useful outside of specific use-case.

x6 boost is achieved only because solution became single-threaded. Note: not SP/SC, but single-threaded, producer and consumer should be executed on the same thread. No volatile, no barriers, no memory synchronization.

[voddan]

That's what I expected. Thanks!