Playground timeout on listing 17-13

[DanielEScherzer]

• I have searched open and closed issues and pull requests for duplicates, using these search terms:
  • 17-13
  • timeout
• I have checked the latest main branch to see if this has already been fixed, in this file:

  • book/listings/ch17-async-await/listing-17-13/src/main.rs

    Lines 39 to 42 in 05d1142

    	for val in vals {
    	tx.send(val).unwrap();
    	trpl::sleep(Duration::from_millis(1500)).await;
    	}

  • book/src/ch17-02-concurrency-with-async.md

    Lines 368 to 374 in 05d1142

    	<Listing number="17-13" caption="Using multiple producers with async blocks" file-name="src/main.rs">
    	```rust
    	{{#rustdoc_include ../listings/ch17-async-await/listing-17-13/src/main.rs:here}}
    	```
    	</Listing>

  • book/.github/workflows/main.yml

    Line 5 in 05d1142

    MDBOOK_VERSION: 0.5.1

  • https://github.com/rust-lang/mdBook/blob/v0.5.1/crates/mdbook-html/front-end/js/book.js#L23-L28

URL to the section(s) of the book with this problem:
https://doc.rust-lang.org/1.94.0/book/ch17-02-concurrency-with-async.html#listing-17-13

Description of the problem:
The example code explicitly includes 4 trpl::sleep(Duration::from_millis(1500)).await; calls, meaning that the program will take at least 4*1500=6000 ms to execute. However, after 6000 ms the default javascript timeout is exhausted, leading to Playground Communication: timeout

Suggested fix:

• reduce the duration
• reduce the number of examples
• disable the playground (precedent at Playground Timeout on example at 16.02 #2607)