From e34db0fa0206bc196f7f07ea7cb31c6efdbc48bc Mon Sep 17 00:00:00 2001
From: Sven Weidauer <sven@5sw.de>
Date: Wed, 15 Dec 2021 19:35:16 +0100
Subject: [PATCH] Print duration

---
 common.swift | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/common.swift b/common.swift
index 1df8bf4..3716c97 100644
--- a/common.swift
+++ b/common.swift
@@ -1,3 +1,5 @@
+import Foundation
+
 protocol Puzzle {
     mutating func run()
     init()
@@ -5,8 +7,15 @@ protocol Puzzle {
 
 extension Puzzle {
     static func main() {
+        let start = Date()
         var instance = Self()
         instance.run()
+        let duration = Date().timeIntervalSince(start)
+        if duration > 1 {
+            print(String(format: "Took %.2f s", duration))
+        } else {
+            print(String(format: "Took %.2f ms", 1000 * duration))
+        }
     }
 }