1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18

pub(crate) const PERF_ENV_VAR: &str = "GSTORE_PERF";

#[macro_export]
macro_rules! print_perf {
    (
        $expr:expr;
        $message:expr
    ) => {
        if let Ok(_s) = std::env::var(crate::utils::PERF_ENV_VAR) {
            let t0 = std::time::Instant::now();
            $expr;
            let d = std::time::Instant::now().duration_since(t0);
            println!("[gstore] [{:06} μs]: {}", d.as_micros(), $message);
        } else {
            $expr;
        }
    };
}