Coroutines and async/await 164 If you run the program by writing cargo run, you should get the following output: Program starting FIRST POLL-START OPERATION FIRST POLL-START OPERATION FIRST POLL-START OPERATION FIRST POLL-START OPERATION FIRST POLL-START OPERATION HTTP/1. 1 200 OK content-length: 11 connection: close content-type: text/plain; charset=utf-8 date: Tue, xx xxx xxxx 21:11:36 GMT Hello World0 HTTP/1. 1 200 OK content-length: 11 connection: close content-type: text/plain; charset=utf-8 date: Tue, xx xxx xxxx 21:11:37 GMT Hello World1 HTTP/1. 1 200 OK content-length: 11 connection: close content-type: text/plain; charset=utf-8 date: Tue, xx xxx xxxx 21:11:38 GMT Hello World2 HTTP/1. 1 200 OK content-length: 11 connection: close content-type: text/plain; charset=utf-8 date: Tue, xx xxx xxxx 21:11:39 GMT Hello World3 HTTP/1. 1 200 OK content-length: 11 connection: close content-type: text/plain; charset=utf-8 date: Tue, xx xxx xxxx 21:11:40 GMT Hello World4 ELAPSED TIME: 4. 0084987