diff --git a/app/src/main/java/com/google/android/samples/socialite/ui/home/timeline/TimelineViewModel.kt b/app/src/main/java/com/google/android/samples/socialite/ui/home/timeline/TimelineViewModel.kt
index caae0e19..dd1991e7 100644
--- a/app/src/main/java/com/google/android/samples/socialite/ui/home/timeline/TimelineViewModel.kt
+++ b/app/src/main/java/com/google/android/samples/socialite/ui/home/timeline/TimelineViewModel.kt
@@ -18,6 +18,7 @@ package com.google.android.samples.socialite.ui.home.timeline
 
 import android.content.Context
 import android.net.Uri
+import android.util.Log
 import androidx.annotation.OptIn
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -52,6 +53,9 @@ class TimelineViewModel @Inject constructor(
     // Width/Height ratio of the current media item, used to properly size the Surface
     var videoRatio by mutableStateOf<Float?>(null)
 
+    var timeAtPlayerPrepare: Long = 0
+    private val TAG = TimelineViewModel::class.java.simpleName
+
     private val videoSizeListener = object : Player.Listener {
         override fun onVideoSizeChanged(videoSize: VideoSize) {
             videoRatio = if (videoSize.height > 0 && videoSize.width > 0) {
@@ -63,6 +67,16 @@ class TimelineViewModel @Inject constructor(
         }
     }
 
+    // Used to track performance of preload manager
+    private val firstFrameRenderedListener = object : Player.Listener {
+        override fun onRenderedFirstFrame() {
+            super.onRenderedFirstFrame()
+            val timeToFirstRenderFrame = System.currentTimeMillis() - timeAtPlayerPrepare
+            // Use this value in future to compare performance with and without preload manager
+            Log.d(TAG, "First frame rendered in $timeToFirstRenderFrame ms")
+        }
+    }
+
     init {
         viewModelScope.launch {
             val allChats = repository.getChats().first()
@@ -105,6 +119,7 @@ class TimelineViewModel @Inject constructor(
                 it.repeatMode = ExoPlayer.REPEAT_MODE_ONE
                 it.playWhenReady = true
                 it.addListener(videoSizeListener)
+                it.addListener(firstFrameRenderedListener)
             }
 
         videoRatio = null
@@ -129,6 +144,7 @@ class TimelineViewModel @Inject constructor(
             videoRatio = null
             if (uri != null) {
                 setMediaItem(MediaItem.fromUri(uri))
+                timeAtPlayerPrepare = System.currentTimeMillis()
                 prepare()
             } else {
                 clearMediaItems()