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use std::time::{Duration, Instant};
use xshell::{cmd, Shell};
#[test]
fn fixed_cost_compile_times() {
let sh = Shell::new().unwrap();
let _p = sh.push_dir("tests/data");
let baseline = compile_bench(&sh, "baseline");
let _ducted = compile_bench(&sh, "ducted");
let xshelled = compile_bench(&sh, "xshelled");
let ratio = (xshelled.as_millis() as f64) / (baseline.as_millis() as f64);
assert!(1.0 < ratio && ratio < 10.0);
fn compile_bench(sh: &Shell, name: &str) -> Duration {
let _p = sh.push_dir(name);
let cargo_build = cmd!(sh, "cargo build -q");
cargo_build.read().unwrap();
let n = 5;
let mut times = Vec::new();
for _ in 0..n {
sh.remove_path("./target").unwrap();
let start = Instant::now();
cargo_build.read().unwrap();
let elapsed = start.elapsed();
times.push(elapsed);
}
times.sort();
times.remove(0);
times.pop();
let total = times.iter().sum::<Duration>();
let average = total / (times.len() as u32);
eprintln!("compiling {name}: {average:?}");
total
}
}
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