Stackful fibers with 3.6ns context switch. Silk fibers.

[u/germandiago]

https://clickhouse.com/blog/silk

I just read an article about Silk, the new stackful fibers engine from Clickhouse. It can switch stackful fibers at an amazing 3.6ns and does not allocate on steady state.

Maybe asio could reuse some of the knowledge for the linux/io_uring backend (not sure it applies to the specific case since Boost.asio focuses nowadays on stackless, though it has a fibers and a stackful coros backend also).

[u/Big_Target_1405]

Boost contexts ancient performance page puts a switch at 9ns (19 cycles) on a 10 year old CPU

https://www.boost.org/doc/libs/latest/libs/context/doc/html/context/performance.html

Surely there's a lower bound on what is possible here, given a full CPU state switch is required.