Family Day update

Task/Time-a-function/JavaScript/time-a-function.js

@@ -0,0 +1,12 @@
+function test() {
+    let n = 0
+    for(let i = 0; i < 1000000; i++){
+        n += i
+    }
+}
+
+let start = new Date().valueOf()
+test()
+let end = new Date().valueOf()
+
+console.log('test() took ' + ((end - start) / 1000) + ' seconds') // test() took 0.001 seconds