Rust程序的性能优化从测量开始。本文介绍Rust性能优化的系统方法。 ## 测量先行 ```bash cargo build --release perf record -g ./target/release/myapp perf report cargo install flamegraph cargo flamegraph ``` ## 编译优化 ```toml [profile.release] opt-level = 3 lto = "fat" codegen-units = 1 panic = "abort" strip = true ``` ## 内存分配 ```rust use mimalloc::MiMalloc; #[global_allocator] static GLOBAL: MiMalloc = MiMalloc; ``` ## 并行计算 ```rust use rayon::prelude::*; let sum: i32 = (0..1_000_000) .into_par_iter() .map(|x| x * x) .sum(); ``` ## 内联提示 ```rust #[inline(always)] fn hot_function(x: i32) -> i32 { x * 2 + 1 } ``` 性能优化的核心原则：先测量，再优化，最后验证。