# UE 5.2.1 Pixel Streaming performance problem **URL:** \ **Category:** Platform & Builds\ **Tags:** unreal-engine, question\ **Created:** [August 31, 2023, 9:30pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169 "2023-08-31T21:30:36Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![Uno1982](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/uno1982/32/982436_2.png) [@Uno1982](https://forums.unrealengine.com/u/Uno1982)\ **Post date:** [November 7, 2023, 4:31pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/21 "2023-11-07T16:31:51Z")
Just wanted to update this thread that we’ve pushed the UE5.3.2 patch into our testing env and are still seeing the performance issues. Sticking with UE5.1 for now. Will update the UDN ticket. ---
**Author:** ![JacobZhou](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@JacobZhou](https://forums.unrealengine.com/u/JacobZhou)\ **Post date:** [November 8, 2023, 1:59pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/22 "2023-11-08T13:59:13Z")
Really sad to hear that ☹ Just had a test on 5.3.2 and here is the captured video ---
**Author:** ![Uno1982](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/uno1982/32/982436_2.png) [@Uno1982](https://forums.unrealengine.com/u/Uno1982)\ **Post date:** [November 15, 2023, 4:10pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/23 "2023-11-15T16:10:38Z")
[memory leaks in pixel streaming(5.21) - Programming & Scripting / Multiplayer & Networking - Epic Developer Community Forums (unrealengine.com)](https://forums.unrealengine.com/t/memory-leaks-in-pixel-streaming-5-21/1347280) Just wanted to make sure these forums were linked together as they are focused on the same issue. ---
**Author:** ![JacobZhou](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@JacobZhou](https://forums.unrealengine.com/u/JacobZhou)\ **Post date:** [November 17, 2023, 3:04pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/24 "2023-11-17T15:04:53Z")
Thanks a lot for the hint. I applied codes below from those PRs and the problem is fixed. It seems that memory leak leads to the drop of fps. ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/3/c/33ca90c21066157bd40bd93b5b49d5b12d9df8f9.png) ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/6/9/9/6995cc21041df2cb7cdc804487b7e39cf5e228bf.png) ---
**Author:** ![Uno1982](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/uno1982/32/982436_2.png) [@Uno1982](https://forums.unrealengine.com/u/Uno1982)\ **Post date:** [November 17, 2023, 11:46pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/25 "2023-11-17T23:46:40Z")
Seeing the same and begging UDN at this point to get the following PR into UE5.3’s next hotfix or UE5.4 [https://github.com/EpicGames/UnrealEngine/pull/11068#issuecomment-1816362961](https://github.com/EpicGames/UnrealEngine/pull/11068#issuecomment-1816362961) ---
**Author:** ![JacobZhou](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@JacobZhou](https://forums.unrealengine.com/u/JacobZhou)\ **Post date:** [December 13, 2023, 3:08pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/27 "2023-12-13T15:08:48Z")
I just tried to switch to UE5.3, implementing PRs above for the memory leak issue. However, I encountered a new bug. Upon connecting to pixel streaming or changing streaming levels, there’s a bothersome 15-second input lag of seconds. This seems linked to high CPU usage, disrupting pixel streaming. Tests reveal that UE5.2 experiences the same issue, while utilizing the pixel streaming plugin from UE5.1 poses no problems. ---
**Author:** ![Monsterlutz](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Monsterlutz](https://forums.unrealengine.com/u/Monsterlutz)\ **Post date:** [January 8, 2024, 2:42pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/28 "2024-01-08T14:42:57Z")
Anything new on this topic? Same issue with 5.3.2. ---
**Author:** ![jojojonasnas](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@jojojonasnas](https://forums.unrealengine.com/u/jojojonasnas)\ **Post date:** [January 27, 2024, 12:23am UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/29 "2024-01-27T00:23:03Z")
I also have this issue with 5.3.2 ---
**Author:** ![Macdeagle](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Macdeagle](https://forums.unrealengine.com/u/Macdeagle)\ **Post date:** [February 27, 2024, 12:28pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/30 "2024-02-27T12:28:15Z")
Hey, we had a simillar issue with low performance in 5.3 on streams and I found that deactivating the UDP Messaging plugin helped. Not sure why and how but maybe that helps someone… ---
**Author:** ![M.Emmanouilidis](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@M.Emmanouilidis](https://forums.unrealengine.com/u/M.Emmanouilidis)\ **Post date:** [March 29, 2024, 12:50pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/31 "2024-03-29T12:50:48Z")
Hi There, Do you still have the performance Issue on our Platform? We have solved every performance Issue with our Custom WebRTC solution. Looking forward to your feedback. here is my mail [m.emmanouilidis@arcware.com](mailto:m.emmanouilidis@arcware.com), we could arrange a call if you need further support on this topic ---
**Author:** ![Uno1982](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/uno1982/32/982436_2.png) [@Uno1982](https://forums.unrealengine.com/u/Uno1982)\ **Post date:** [June 22, 2024, 12:52pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/32 "2024-06-22T12:52:31Z")
Looks like 5.4.2 finally resolved the leak … however, compared to UE4.27.2 it still feels rather jittery from a performance standpoint even though UE5 says its running at 100hz compared to UE4.27 60htz locked. ---
**Author:** ![JacobZhou](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@JacobZhou](https://forums.unrealengine.com/u/JacobZhou)\ **Post date:** [July 25, 2024, 3:35am UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/33 "2024-07-25T03:35:27Z")
We also tested 5.4.3 for a couple of days. It seems stable so far, but much slower (300ms) in response to user input compared to 5.1 which feels less than 100ms. ---
**Author:** ![InfinityVoid.io](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@InfinityVoid.io](https://forums.unrealengine.com/u/InfinityVoid.io)\ **Post date:** [July 29, 2024, 7:50am UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/34 "2024-07-29T07:50:16Z")
Check out our guide for a step by step instructions on how to improve pixel streaming performance: [Improve Pixel Streaming Performance | Unreal Engine 5 | Best Practises | by Infinity Void | Jul, 2024 | Medium](https://infinityvoid.medium.com/improve-pixel-streaming-performance-unreal-engine-5-best-practises-3c9015d48dc4) ---
**Author:** ![Uno1982](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/uno1982/32/982436_2.png) [@Uno1982](https://forums.unrealengine.com/u/Uno1982)\ **Post date:** [July 29, 2024, 6:26pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/35 "2024-07-29T18:26:09Z")
Thanks for the guide as its greatly appreciated but I think in the context of the statements above the performance issues are due to either memory leaks (one which I’ve actually caught a PR and code reviewed that is a regression that tried to sneak its way back into main after 5.4.3 hotfix) or to simply state that without any changes performance of pixel streaming even after resolving the memory leaks has taken a huge hit since the webrtc changes between 5.1 and 5.4. I have a 4.27.2 build, 5.1 and 5.4 build of our application without any real changes to the application between 4.27 and 5.1 other than moving away from baked lights to dynamic and maintaining 60+ fps on our benchmark machines. The UE5.4 build shows even faster frame times however pixel streaming performance is horrid. [Fixed a memory leak in FVideoResourceCUDA again. [to release branch] by zuvola · Pull Request #12166 · EpicGames/UnrealEngine (github.com)](https://github.com/EpicGames/UnrealEngine/pull/12166) ---
**Author:** ![AndrewQM](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@AndrewQM](https://forums.unrealengine.com/u/AndrewQM)\ **Post date:** [December 22, 2024, 9:03pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/36 "2024-12-22T21:03:18Z")
Seems to still be an issue with 5.5. Latency in the viewport is many times more than the ping to server computer. With 60 ms ping to my server, I’m seeing 1-2 second latency… This is with 5.5 and the ‘pixel streaming 2’ plugin and github repo. Like @ClaudeSteiner, I verified with a remote desktop tool (parsec) that inputs from the client arrive almost immediately, and it’s the sending of video back to the client that is very slow. Anyone have advice on the minimal necessary changes to get this working. Do I need to downgrade the whole engine to 5.1 or can I just downgrade the plugin? ---
**Author:** ![Uno1982](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/uno1982/32/982436_2.png) [@Uno1982](https://forums.unrealengine.com/u/Uno1982)\ **Post date:** [December 24, 2024, 8:59pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/37 "2024-12-24T20:59:20Z")
And thus the situation continues. ☹ ---
**Author:** ![InfinityVoid.io](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@InfinityVoid.io](https://forums.unrealengine.com/u/InfinityVoid.io)\ **Post date:** [December 28, 2024, 2:24am UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/38 "2024-12-28T02:24:23Z")
Hi there, The pixel streaming infrastructure ensures backward compatibility, so please try running the app using PS Version 5.4 or 5.3 to see if the issue persists. If you’d rather avoid that hassle, you can also try [https://www.streampixel.io/](https://www.streampixel.io/). It’s a simple upload-and-stream pixel streaming platform available on the market, and it’s quite economical too. Best, ---
**Author:** ![Giladbooch](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Giladbooch](https://forums.unrealengine.com/u/Giladbooch)\ **Post date:** [January 26, 2025, 8:38pm UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/39 "2025-01-26T20:38:08Z")
Somebody found a solution? Im using UE5.5 and the stream is jittery but the build viweport seems to react well to the controller i us in the web application. i assume the problem lays in the engine trying to send information back to the web application. Have any insights? ---
**Author:** ![Uno1982](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/uno1982/32/982436_2.png) [@Uno1982](https://forums.unrealengine.com/u/Uno1982)\ **Post date:** [March 12, 2025, 8:44am UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/40 "2025-03-12T08:44:52Z")
Nope it’s been 3 minor releases with essentially the same performance issues without resolution. We are still running 5.1 in production due to this for pixel streaming ---
**Author:** ![timonfreud](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/timonfreud/32/1092636_2.png) [@timonfreud](https://forums.unrealengine.com/u/timonfreud)\ **Post date:** [August 25, 2026, 7:14am UTC](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169/41 "2026-08-25T07:14:25Z")
You can try CloudStreamer, access public via web safely, [https://psg.hncedi.cn](https://psg.hncedi.cn) [Previous page](https://forums.unrealengine.com/t/ue-5-2-1-pixel-streaming-performance-problem/1279169.md?page=1)