Consider adding a from_micros for `std::time::Duration`

[gagath]

During the write of an embedded library I needed to make a pause of 10 microseconds. Looking over the Nightly std::time::Duration documentation page I understood that I had to use the following construction:

// Wait 10 microseconds
thread::sleep(Duration::new(0, 10_000));

The sad part is that this is less clear to me than Duration::from_micros(10). Currently the from_millis and from_secs functions are implemented but not from_micros which could help write cleaner code IMO.

The fix seems pretty easy, maybe if you judge this useful I can try to write my first pull request to the Rust project!

[steveklabnik]

The fix seems pretty easy, maybe if you judge this useful I can try to write my first pull request to the Rust project!

In general, this is how @rust-lang/libs works; small additions can just be a PR, larger additions need an RFC. So, I'd suggest that you send in a PR implementing this.

[dtolnay]

Adding from_micros sounds okay to me.

[sfackler]

Yeah, I'd be on board with a PR.

[nagisa]

This is now a tracking issue for the function added in the previously referenced PR.

[SimonSapin]

Looks good to me to stabilize.

@rfcbot fcp merge

[rfcbot]

Team member @SimonSapin has proposed to merge this. The next step is review by the rest of the tagged teams:

• @Kimundi
• @SimonSapin
• @alexcrichton
• @aturon
• @dtolnay
• @sfackler
• @withoutboats

No concerns currently listed.

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