From 1b68c72fe93424213db895a4066eafb99dfdeac9 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Fri, 10 Apr 2020 20:46:42 +0200
Subject: Move timeit to stdx

---
 crates/stdx/src/lib.rs | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'crates/stdx/src')

diff --git a/crates/stdx/src/lib.rs b/crates/stdx/src/lib.rs
index 401a568bd..01cdf452c 100644
--- a/crates/stdx/src/lib.rs
+++ b/crates/stdx/src/lib.rs
@@ -1,6 +1,6 @@
 //! Missing batteries for standard libraries.
 
-use std::{cell::Cell, fmt};
+use std::{cell::Cell, fmt, time::Instant};
 
 #[inline(always)]
 pub fn is_ci() -> bool {
@@ -88,3 +88,17 @@ where
         Ok(())
     }
 }
+pub fn timeit(label: &'static str) -> impl Drop {
+    struct Guard {
+        label: &'static str,
+        start: Instant,
+    }
+
+    impl Drop for Guard {
+        fn drop(&mut self) {
+            eprintln!("{}: {:?}", self.label, self.start.elapsed())
+        }
+    }
+
+    Guard { label, start: Instant::now() }
+}
-- 
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