FYI: The fastest C++ coroutine library by the year of 2022

[beef9999]

https://github.com/alibaba/PhotonLibOS

Compare TCP echo server performance, in descending order.

Client Mode: Streaming

	Concurrency Model	Buffer Size	Conn Num	QPS	Bandwidth	CPU util
Photon	Stackful coroutine	512 Bytes	4	1604K	6.12Gb	99%
cocoyaxi	Stackful coroutine	512 Bytes	4	1545K	5.89Gb	99%
Rust tokio	Rust coroutine	512 Bytes	4	1384K	5.28Gb	98%
Go	Goroutine	512 Bytes	4	1083K	4.13Gb	100%
libgo	Stackful coroutine	512 Bytes	4	770K	2.94Gb	99%
boost::asio	Async + Callback	512 Bytes	4	634K	2.42Gb	97%
libco	Stackful coroutine	512 Bytes	4	432K	1.65Gb	96%
zab	C++20 stackless coroutine	512 Bytes	4	412K	1.57Gb	99%
asyncio	C++20 stackless coroutine	512 Bytes	4	163K	0.60Gb	98%

Client Mode: Ping-pong

	Concurrency Model	Buffer Size	Conn Num	QPS	Bandwidth	CPU util
Photon	Stackful coroutine	512 Bytes	1000	412K	1.57Gb	100%
boost::asio	Async + Callback	512 Bytes	1000	393K	1.49Gb	100%
Rust tokio	Rust coroutine	512 Bytes	1000	365K	1.39Gb	100%
Go	Goroutine	512 Bytes	1000	331K	1.26Gb	100%
zab	C++20 stackless coroutine	512 Bytes	1000	317K	1.21Gb	100%
cocoyaxi	Stackful coroutine	512 Bytes	1000	279K	1.06Gb	98%
libco	Stackful coroutine	512 Bytes	1000	260K	0.99Gb	96%
libgo	Stackful coroutine	512 Bytes	1000	258K	0.98Gb	156%
asyncio	C++20 stackless coroutine	512 Bytes	1000	142K	0.54Gb	99%