diff --git a/playground/index.html b/playground/index.html
index 6537985..88091c7 100644
--- a/playground/index.html
+++ b/playground/index.html
@@ -35,6 +35,7 @@
     </head>
     <body>
         <div>
+            <code>main-thread-scheduling:</code>
             <button id="run-interactive">interactive</button>
             <button id="run-interactive-5s">interactive (5s)</button>
             <button id="run-smooth">smooth</button>
@@ -44,12 +45,14 @@
         </div>
         <br />
         <div>
+            <code>scheduler.postTask():</code>
             <button id="post-task-blocking">postTask('user-blocking')</button>
             <button id="post-task-visible">postTask('user-visible')</button>
             <button id="post-task-background">postTask('background')</button>
         </div>
         <br />
         <div>
+            <code>others:</code>
             <button id="queue-task">queueTask()</button>
             <button id="simulate-work">simulateWork()</button>
             <button id="post-task-vs-yield-or-continue">postTask() vs yieldOrContinue()</button>
diff --git a/playground/playground.ts b/playground/playground.ts
index 927715f..fa6f747 100644
--- a/playground/playground.ts
+++ b/playground/playground.ts
@@ -49,17 +49,16 @@ document.querySelector('#queue-task')!.addEventListener('click', () => {
 })
 
 async function run(strategy: SchedulingStrategy, time: number = 1000) {
-    const start = Date.now()
-    while (Date.now() - start < time) {
+    const start = performance.now()
+    while (performance.now() - start < time) {
         if (isTimeToYield(strategy)) {
             await yieldOrContinue(strategy)
         }
         simulateWork()
     }
-    performance.measure(strategy, {
+    performance.measure(`${strategy} (${Math.round(time / 1000)}s)`, {
         start: start,
-        end: Date.now(),
-        detail: 'awesome',
+        end: performance.now(),
     })
 }
 
