Updating slider.value causes major stutter in VideoPlayer

I'm attempting to make a video player in Unity with the new VideoPlayer gameObject. I have made a slider to scrub through the time of the video which works perfectly fine, except there is one issue. I am trying to update the value of the slider every frame to scroll automatically as the video plays (like every video player has)

I have the following code:

 public Slider timelineSlider;
 void Update() {
     timelineSlider.value = (float)player.frame;
 }

With the code above in place, when I run the player and play a video clip, the framerate drops majorly and causes a huge amount of stutter in the video.

I tried only updating every 30 frames with:

 public Slider timelineSlider;
 void Update() {
     if (Time.frameCount % 30 == 0) {
         timelineSlider.value = (float)player.frame;
     }
 }

And you can still notice little stutters every 30 frames of the video (when it updates the slider). I don't understand why updating a slider can cause this. This very well may just be a bug report, but hopefully there's an alternative method for what I'm doing (or a simple fix)