Add Timing Processes as a javascript til

javascript/timing-processes.md

@@ -0,0 +1,25 @@
+# Timing Processes
+
+If you want to time a process, you can use the `console.time()` and
+`console.timeEnd()` utilities specified by the `console` Web API. Invoking
+`console.time()` with a label starts a named timer. You can then run the
+process you want to time. Then invoke `console.timeEnd()` with the same
+label to terminate the timer and see how long the process took.
+
+```javascript
+console.time('sorting');
+[11,10,9,8,7,6,5,4,3,2,1].sort();
+console.timeEnd('sorting');
+> sorting: 0.278ms
+
+console.time('console logging');
+console.log('logging to the console');
+console.timeEnd('console logging');
+> logging to the console
+> console logging: 0.311ms
+
+console.time('adding'); 1 + 1; console.timeEnd('adding');
+> adding: 0.006ms
+```
+
+These functions are implemented in most modern browsers.