advance-practice/overview

[giscus[bot]]

advance-practice/overview

https://course.rs/advance-practice/overview.html

[zhangdekui]

PING course.rs (172.67.146.28): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
64 bytes from 172.67.146.28: icmp_seq=4 ttl=49 time=363.361 ms
Request timeout for icmp_seq 5
Request timeout for icmp_seq 6
Request timeout for icmp_seq 7
Request timeout for icmp_seq 8
Request timeout for icmp_seq 9
Request timeout for icmp_seq 10
Request timeout for icmp_seq 11
64 bytes from 172.67.146.28: icmp_seq=12 ttl=49 time=259.395 ms
64 bytes from 172.67.146.28: icmp_seq=13 ttl=49 time=362.051 ms
64 bytes from 172.67.146.28: icmp_seq=14 ttl=49 time=367.927 ms
64 bytes from 172.67.146.28: icmp_seq=15 ttl=49 time=375.493 ms
Request timeout for icmp_seq 16
64 bytes from 172.67.146.28: icmp_seq=17 ttl=49 time=410.640 ms
Request timeout for icmp_seq 18
64 bytes from 172.67.146.28: icmp_seq=19 ttl=49 time=445.566 ms

[zhangdekui]

感觉有点被墙

[PaiGack]

正在 Ping course.rs [2606:4700:3033::ac43:921c] 具有 32 字节的数据:
来自 2606:4700:3033::ac43:921c 的回复: 时间=224ms
来自 2606:4700:3033::ac43:921c 的回复: 时间=212ms
来自 2606:4700:3033::ac43:921c 的回复: 时间=203ms
来自 2606:4700:3033::ac43:921c 的回复: 时间=204ms

2606:4700:3033::ac43:921c 的 Ping 统计信息:
数据包: 已发送 = 4，已接收 = 4，丢失 = 0 (0% 丢失)，
往返行程的估计时间(以毫秒为单位):
最短 = 203ms，最长 = 224ms，平均 = 210ms

[popuper]

PING course.rs (104.21.39.142): 56 data bytes
64 bytes from 104.21.39.142: icmp_seq=0 ttl=52 time=195.850 ms
64 bytes from 104.21.39.142: icmp_seq=1 ttl=52 time=202.981 ms
64 bytes from 104.21.39.142: icmp_seq=2 ttl=52 time=203.277 ms
64 bytes from 104.21.39.142: icmp_seq=3 ttl=52 time=204.177 ms
64 bytes from 104.21.39.142: icmp_seq=4 ttl=52 time=205.933 ms
64 bytes from 104.21.39.142: icmp_seq=5 ttl=52 time=202.554 ms
64 bytes from 104.21.39.142: icmp_seq=6 ttl=52 time=202.971 ms
64 bytes from 104.21.39.142: icmp_seq=7 ttl=52 time=203.693 ms
64 bytes from 104.21.39.142: icmp_seq=8 ttl=52 time=197.204 ms
64 bytes from 104.21.39.142: icmp_seq=9 ttl=52 time=204.923 ms
64 bytes from 104.21.39.142: icmp_seq=10 ttl=52 time=200.568 ms
64 bytes from 104.21.39.142: icmp_seq=11 ttl=52 time=203.552 ms
64 bytes from 104.21.39.142: icmp_seq=12 ttl=52 time=205.539 ms
64 bytes from 104.21.39.142: icmp_seq=13 ttl=52 time=205.885 ms
^C
--- course.rs ping statistics ---
15 packets transmitted, 14 packets received, 6.7% packet loss
round-trip min/avg/max/stddev = 195.850/202.793/205.933/2.922 ms

[Yhao90]

一直不大理解为何叫做运行时。。
之前以为 async await 关键字是rust提供的底层异步能力，tokio 是对这个的封装，但看到这又模糊了😂

[easonz777]

The book 中提到过, async 和 await 只是 rust 提供用以表示目的的关键词, await 表示该处是"让出" 和 "恢复" 执行权的点, async 表示该段代码将返回一个因为 await 而产生的 future. 我的理解是, 怎么 "让出", 什么时候 "恢复", 怎么从多个可以 "恢复" 的点中挑选出点, 这些逻辑则是由运行时决定. 类似于车道线和红绿灯都给出来了, 但最终驾驶车辆执行操作的人是人, tokio 就是这个人.

[bxb100]

我理解就是 async 就是 thread::spawn 的简化, tokio 就是 thread pool

错误理解

[gaonie]

我也不理解，你现在是怎么理解的，说说嘛

[cleanwk]

PING course.rs (172.67.146.28): 56 data bytes
64 bytes from 172.67.146.28: icmp_seq=0 ttl=38 time=408.496 ms
64 bytes from 172.67.146.28: icmp_seq=1 ttl=38 time=436.375 ms
64 bytes from 172.67.146.28: icmp_seq=2 ttl=38 time=371.930 ms
64 bytes from 172.67.146.28: icmp_seq=3 ttl=38 time=470.838 ms
64 bytes from 172.67.146.28: icmp_seq=4 ttl=38 time=369.266 ms
64 bytes from 172.67.146.28: icmp_seq=5 ttl=38 time=412.094 ms
64 bytes from 172.67.146.28: icmp_seq=6 ttl=38 time=369.868 ms
Request timeout for icmp_seq 7
64 bytes from 172.67.146.28: icmp_seq=8 ttl=38 time=477.911 ms
Request timeout for icmp_seq 9
64 bytes from 172.67.146.28: icmp_seq=10 ttl=38 time=416.466 ms
Request timeout for icmp_seq 11
Request timeout for icmp_seq 12
64 bytes from 172.67.146.28: icmp_seq=13 ttl=38 time=371.834 ms
64 bytes from 172.67.146.28: icmp_seq=14 ttl=38 time=371.471 ms
^C
--- course.rs ping statistics ---
16 packets transmitted, 11 packets received, 31.2% packet loss
round-trip min/avg/max/stddev = 369.266/406.959/477.911/38.866 ms

[xiaoyihao001018]

我理解的异步运行时框架其实就是他会自动调度调节好你异步时候的任务 让他最高效