Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
hachyderm.io is one of the many independent Mastodon servers you can use to participate in the fediverse.
Hachyderm is a safe space, LGBTQIA+ and BLM, primarily comprised of tech industry professionals world wide. Note that many non-user account types have restrictions - please see our About page.

Administered by:

Server stats:

8.9K
active users

hachyderm.io: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.3.7

Mara

Rust 1.66 comes with std::hint::black_box(), a function that does nothing. However, the compiler tries its very best to pretend it doesn't know what that function does.

It is useful in benchmarks, to prevent the compiler from optimizing your entire benchmark away.

2/12

use std::hint::black_box; use std::sync::atomic::{AtomicU64, Ordering}; use std::time::Instant; static A: AtomicU64 = AtomicU64::new(0); fn main() { black_box(&A); // Pretend other threads might interact with A. let start = Instant::now(); for _ in 0..1_000_000_000 { black_box(A.load(Ordering::Relaxed)); // Pretend we care about the result. } println!("{:?}", start.elapsed()); }
Dec 15, 2022, 05:17 PM·Public·Mastodon Twitter Crossposter
30boosts·135favorites
ExploreLive feeds
About