diff --git a/spec/regexper_spec.js b/spec/regexper_spec.js
index 1e29fca..01f08de 100644
--- a/spec/regexper_spec.js
+++ b/spec/regexper_spec.js
@@ -484,6 +484,15 @@ describe('regexper.js', function() {
           .done();
       });
 
+      it('tracks the total rendering time', function(done) {
+        this.regexper.renderRegexp('example expression')
+          .then(() => {
+            expect(window._gaq.push).toHaveBeenCalledWith(['_trackTiming', 'visualization', 'total time', jasmine.any(Number)]);
+          }, fail)
+          .finally(done)
+          .done();
+      });
+
     });
 
     describe('when the rendering is cancelled', function() {
diff --git a/src/js/regexper.js b/src/js/regexper.js
index 13a2908..0a750a5 100644
--- a/src/js/regexper.js
+++ b/src/js/regexper.js
@@ -125,7 +125,8 @@ export default class Regexper {
   }
 
   renderRegexp(expression) {
-    var parseError = false;
+    var parseError = false,
+        startTime, endTime;
 
     if (this.running) {
       let deferred = Q.defer();
@@ -141,6 +142,7 @@ export default class Regexper {
 
     this.state = 'is-loading';
     window._gaq.push(['_trackEvent', 'visualization', 'start']);
+    startTime = new Date().getTime();
 
     this.running = new Parser(this.svgContainer);
 
@@ -161,6 +163,9 @@ export default class Regexper {
         this.updateLinks();
         this.displayWarnings(this.running.warnings);
         window._gaq.push(['_trackEvent', 'visualization', 'complete']);
+
+        endTime = new Date().getTime();
+        window._gaq.push(['_trackTiming', 'visualization', 'total time', endTime - startTime]);
       })
       .then(null, message => {
         if (message === 'Render cancelled') {