51 lines
1.3 KiB
Rust
51 lines
1.3 KiB
Rust
use lazy_static::lazy_static;
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use once_cell::sync::Lazy;
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const N_THREADS: usize = 32;
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const N_ROUNDS: usize = 100_000_000;
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static ONCE_CELL: Lazy<Vec<String>> = Lazy::new(|| vec!["Spica".to_string(), "Hoyten".to_string()]);
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lazy_static! {
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static ref LAZY_STATIC: Vec<String> = vec!["Spica".to_string(), "Hoyten".to_string()];
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}
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fn main() {
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let once_cell = {
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let start = std::time::Instant::now();
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let threads = (0..N_THREADS)
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.map(|_| std::thread::spawn(move || thread_once_cell()))
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.collect::<Vec<_>>();
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for thread in threads {
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thread.join().unwrap();
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}
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start.elapsed()
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};
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let lazy_static = {
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let start = std::time::Instant::now();
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let threads = (0..N_THREADS)
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.map(|_| std::thread::spawn(move || thread_lazy_static()))
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.collect::<Vec<_>>();
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for thread in threads {
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thread.join().unwrap();
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}
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start.elapsed()
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};
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println!("once_cell: {:?}", once_cell);
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println!("lazy_static: {:?}", lazy_static);
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}
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fn thread_once_cell() {
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for _ in 0..N_ROUNDS {
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let len = ONCE_CELL.len();
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assert_eq!(len, 2)
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}
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}
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fn thread_lazy_static() {
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for _ in 0..N_ROUNDS {
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let len = LAZY_STATIC.len();
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assert_eq!(len, 2)
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}
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}
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