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  July 21, 2019 - 11:36am
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You make a very good point about comparison basis. If the users posting here have never experienced the super smooth performance of the 4K AppleTV running at 1080p on a 1080p TV, they don't have near as good of an assessment regarding performance difference.

  Christian1979 wrote:

I use 4K SDR Output and I see a big difference in Performance...

In Infuse for example the Posters are Loading much slower, and I see White Posters...

I have tested everything!
I use a Belkin High Performance HDMI cable, but this not make an improvement!

I think all users get this slower Performance with 4K Output! But they don’t notice it really, because they have no comparison with the 1080p Performance 😉

  July 21, 2019 - 11:37am
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  Christian1979 wrote:

Yes 😉 i have tested 3 different Models (from different manufactures) 😉

On all I get the slow Performance with the 4K Output!

You tested with another Apple TV 4K? That’s the last resort, otherwise I have no idea.

  July 21, 2019 - 11:40am
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  XxZombieMedicxX wrote:

You make a very good point about comparison basis. If the users posting here have never experienced the super smooth performance of the 4K AppleTV running at 1080p on a 1080p TV, they don't have near as good of an assessment regarding performance difference.

Yeah I understand that point but I wouldn’t call the 4K Gui really really slow and sluggish like OP had said.

  July 21, 2019 - 11:40am
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  NikG wrote:

You tested with another Apple TV 4K? That’s the last resort, otherwise I have no idea.

You could make a Test and set the resolution to 1080p!

And then open Infuse and load the All Movies or All TVShows...

Is there a big difference in Loading Performance?

TV 4K (32 GB) • tvOS 13 • Infuse Pro 6.2 • Synology DS-216play • Unitymedia Connect Box • Sony MASTER Series AG9

  July 21, 2019 - 11:42am
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It definitely is sluggish. My 4K AppleTV running on a 1080p TV and the latest TvOS 13 beta in the living room is crazy fast and smooth. This is why I noticed the dramatic reduction of performance when switching to a 4K TV.

  July 21, 2019 - 11:48am
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  Christian1979 wrote:

You could make a Test and set the resolution to 1080p!

And then open Infuse and load the All Movies or All TVShows...

Is there a big difference in Loading Performance?

Ok I tested 4K SDR 50hrtz with 1080p SDR 50hrtz and I see no no difference in speed, lag, load time and navigation on my LG B8 using infuse or any other app.

  July 21, 2019 - 11:53am
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  NikG wrote:

Ok I tested 4K SDR 50hrtz with 1080p SDR 50hrtz and I see no no difference in speed, lag, load time and navigation on my LG B8 using infuse or any other app.

That’s really strange!
Could you please make a Short video which show the Loading of „All Movies“... Once with 4K Output, and once with 1080p Output?

TV 4K (32 GB) • tvOS 13 • Infuse Pro 6.2 • Synology DS-216play • Unitymedia Connect Box • Sony MASTER Series AG9

  July 21, 2019 - 12:48pm
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  XxZombieMedicxX wrote:

You make a very good point about comparison basis. If the users posting here have never experienced the super smooth performance of the 4K AppleTV running at 1080p on a 1080p TV, they don't have near as good of an assessment regarding performance difference.

I have 4 ATV running on different TV's (1 SONY 4K, 1 LG 1080P, 1 LG OLED 4K and 1 Samsung 1080P) and I have a mix of Apple TV's (2 4K and 2 non 4K) - the performance is identical on all devices on all TV's irrespective of resolution. I ran my 4K ATV's on 1080P TV's until I got the new 4K TV's (one in 2017 and one last year). On my setup Plex and infuse populate instantly, I never see missing posters or any other art elements.

I also see no difference in any other apps like Netflix or Amazon Prime, to my eye there is just no difference in Plex or Infuse on my setup.

sTeVE

  July 21, 2019 - 1:39pm
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A Video would be great at Loading „All Movies“ (and scrolling trough ) 😉
Does absolutely NO „White Poster“ appear?

TV 4K (32 GB) • tvOS 13 • Infuse Pro 6.2 • Synology DS-216play • Unitymedia Connect Box • Sony MASTER Series AG9

  July 21, 2019 - 1:54pm
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  Christian1979 wrote:

A Video would be great at Loading „All Movies“ (and scrolling trough ) 😉
Does absolutely NO „White Poster“ appear?

But That’s an entirely different issue to the TVOS interface being slow and sluggish in 4K!? I too get white posters for a few milli seconds but it’s not a deal breaker.

I will try to upload a video tmrw

  July 21, 2019 - 2:02pm
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Yes that’s true, but the „joke“ is:
If it’s set to 4K Output, the performance overall is going slow and the „White Covers“ appear much more often than on 1080p 😉
That’s one consequence from the „slower“ Performance we notice 😉

TV 4K (32 GB) • tvOS 13 • Infuse Pro 6.2 • Synology DS-216play • Unitymedia Connect Box • Sony MASTER Series AG9

  July 21, 2019 - 2:21pm
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  Christian1979 wrote:

Yes that’s true, but the „joke“ is:
If it’s set to 4K Output, the performance overall is going slow and the „White Covers“ appear much more often than on 1080p 😉
That’s one consequence from the „slower“ Performance we notice 😉

I see, I don’t see a difference in that aspect on my setup, performance is exactly the same in 4K and 1080p including the loading of posters.

  July 21, 2019 - 2:34pm
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No noticeable difference here too!

  July 21, 2019 - 2:43pm
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That’s really strange...
I can’t believe it, that it’s a hardware fault...?

TV 4K (32 GB) • tvOS 13 • Infuse Pro 6.2 • Synology DS-216play • Unitymedia Connect Box • Sony MASTER Series AG9

  July 21, 2019 - 2:58pm
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If I speed scroll thu my movies (around 1500 films in my collection) I see grey movie poster icons for a fraction of a second - on both 1080p and 4K. I see no difference in the not poster image appearance time. And at normal browsing behaviour I never see a missing poster on either resolution.

sTeVE

  August 8, 2019 - 11:22am
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  Christian1979 wrote:

I use a Sony OLED AG9/A9G 4K TV now for some time Smile

But I really have to say:
I use not a 4K Output from my AppleTV 4K, I use 1080p and the TV upscale it to 4K...

Because with native 4K Output the Performance of the complete tvOS and all the Apps are really, really slow and sluggish!
For example:
Simply open a App and close it => The Open/Close Animation is choppy Wink

I experience a noticeably worse performance compared to the 1008p output!

I really, really hope in September/October an announcement for a new updated AppleTV 4K with faster Processor, more RAM etc!
The current 4K Model is simply overwhelmed to render a smooth GUI as 4K Output Frown

God im glad i read this post.
I recently got Sony AG9 aswell and i have been so bothered with the microstutters etc on some content, but your post made me realize that its the appletv and not the tv Grin
Tried with PC after i read this and its butter smooth.

I also really really hope new appletv comes..

Thanks dude

  August 9, 2019 - 1:32pm
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I also can confirmed the Apple TV 4K running in 4K HDR resolution TV and 1080p resolution TV had totally identical performance. Very smooth where no performance issue at all.
Never appear white poster when scrolling thru my 1690 movies title.

Setting is Native 4K SDR 60Hz, RGB High, Range & Frame Rate Match Content when running in 4K HDR resolution TV.

Here the video of scrolling content in Infuse running 4K native resolution of Apple TV 4K
https://youtu.be/v_bzkhqHqwQ

Also no single lag in any 4K movies up to remux copy which is same bitrate as the original 4K Ultra-HD blu-ray.

  August 9, 2019 - 2:43pm
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For me its close to identical except for a few things. 25p microstutter sometimes, from PC the same file doesnt.
Playing a 4K 24p movie @ 60hz lags for some reason - the same movie in 1080p 60hz is smooth.