src/util/time.rs

   1 use std::time::Instant;
   2
   3 pub struct ScopeTimer {
   4     #[allow(dead_code)]
   5     start: Instant,
   6     #[allow(dead_code)]
   7     name: &'static str,
   8 }
   9
  10 impl ScopeTimer {
  11     pub fn new(name: &'static str) -> Self {
  12         ScopeTimer { start: Instant::now(), name }
  13     }
  14 }
  15
  16 #[cfg(debug_assertions)]
  17 impl Drop for ScopeTimer {
  18     fn drop(&mut self) {
  19         println!("{} took {:?}", self.name, self.start.elapsed());
  20     }
  21 }
  22
  23 #[macro_export]
  24 macro_rules! time_scope {
  25     () => {
  26         use util::ScopeTimer;
  27         let _magical_scope_timer_ = ScopeTimer::new("scope");
  28     };
  29     ( $name:expr ) => {
  30         use util::ScopeTimer;
  31         let _magical_scope_timer_ = ScopeTimer::new($name);
  32     };
  33 }