They only focus on virtual production and UEFN.
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We spend some time comparing our base beginning project. 5.4.4 vs 5.5.1
Same level , same position . No textures, no custom models, no ai , no volumetric clouds
no Nanite and lumen , Reflection are ssr ,no taa . Forced Vulkan on windows/linux/android only sm6 shaders. Baked stationary lighting with few movable lights
5.4.4
170-190 fps with 5-6ms
very stable
5.5.1
130-140 fps with 6-7
(dropping to 70-80 fps with large ms latency to 40 if physics cubes(50 count) and volumetric clouds enabled.)(standard ue5 level)
also checked standard empty level , same loss of 30-40 fps.
and checked project on our low notebook (not low end) 5.4.4 - stable 38-40 with 25 ms , 5.5.1 25-27 fps with 40-50 ms latency.
linux same as windows. Android loss of 10 fps from 30. Someone wrote that 30% loss , it is real
Sadly to accept but we cannot agree with this loss especially on low devices . But we happy with 5.4.4
Im also found out problem with project compilation with sm6 shaders. 5.5.1 refuses to launch packaged game giving us problem “vulkan driver is required to run the engine”(but works if sm5 selected). While 5.4.4 WITH the same settings of sm6 give us a working packaged game. I think it’s a bug.
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I’ve seen a crash even when gpu usage is far from100%, no idea why, yet engine still uses that as reason for crash. Avoiding .4 and 5 far too harsh on fps.
It’s absolute DOG! I can’t even open the editor because it keeps crashing. How the hell Epic thought it was a good idea to release this is beyond belief. TBH the best version I’ve used is 5.4.2, and every version since then has gotten worse and worse.
4 Likes
I’ve yet to complete my 1st project which is specifically designed to have no less than a few dozen highly unique combined features never seen before in the history of intergalactic games via a truly highly innovative multiplayer open intergalactic warfare title with graphics built by an actual award winning artist even though I was a kid when I won 2nd place in a large city wide contest those skills has drastically improved and I can’t even paint a vehicle without drawing massive amounts of attention from strangers “a few years ago”.
Sorry if I fail to jump straight to the point as I was hit by an 18 wheeler truck so my brain doesn’t work or thought process isn’t like it was before the accident so brain fog is a thing although my technical skills and development skills has drastically increased to levels I never thought possible. Just understand I’m an extremely ambitious Visionaire who aims to only create highly unique works of art. My creative side becomes extremely energized when looking at Unreal.
Now as an artist as important as looks are for me performance is just as important. Actually performance is the most important thing for me via why it’s mental torcher to have to sacrifice “some” visual quality for performance as no matter how great any game may be too much lag would leave any game unplayable. As such I’m extremely OCD about performance and that being the case I’m always paying extreme attention to performance levels not only of unreal engine but also the performance levels of my development machine which sadly only has 32 gig ram but with 131072 gig virtual ram on separate SSD because it seems things are far less stable with virtual ram on same ssd as OS cause I did get allot of OS crashes until I kept ram on separate SSD than entire OS/win 11 just performs amazingly well.
Now to my primary point. I moved from Unity to Unreal about a year and a half ago due to my artistic side being highly interested in UE5’s graphical potential. I started with UE 5.3 and then jumped to 5.4 when it came out and while 5.4 didn’t seem all that stable via various crashes other updates to 5.4+ seemed to fix allot of things. When I reinstalled os I did jump straight to 5.5 BUTTT … as I expected as with any new release of any product not just unreal but other categories such as the new releases of a car model or cpu processor model or even a new graphics card model the 1st versions are generally “normally” a mess till a “revised” version is eventually released. UE version releases appears to be that of a new model like 5.3 vs 5.4 with numbers like 5.4.4 being a revised/improved version of 5.4. That being said I normally like to not jump straight to the newest version of anything but couldn’t help myself when 5.5 came out.
I did extensive performance stress testing with 5.4 via extremely large worlds and WOW… just amazingly WOW the things which can actually be achieved with high graphics quality nearly as good as most AAA titles while even surpassing some current AAA titles. Anyway back on point 5.5 even the smallest test I’ve done was… well… here’s the thing. Whenever I’m observing performance I’m also mentally calculating the limitations before the building limit/feature limit of a game is reached. Before starting on any project I perform severe stress testing and according to my stress test of UE5.5 there would be… somewhat allot less I would be able to do at once or the water pressure seems a bit lower so a good shower no matter how nice the restroom would look with less water pressure to deal with the overall experience of the shower can be far less enjoyable and I’d much prefer the water pressure of 5.4.
The fps drop of 5.5 was a real let down. I’m creating a massive open galactic title to where every single fps increase matters. Maybe my large reply may seem odd or irrelevant to some but it is what it is. I do want to go to 5.5 but honestly I just think better off waiting till 5.6 as the water pressure may be actually fixed by then if ya know what I mean. Guess most important thing to keep in mind is UE is an extremely fast evolving engine and with multiple devs jumping into the core coding well… either way it seems nearly all development tools has their own share of issues but learning ways around those issues/bugs is key. Always best to stick with a version you know very well like knowing all the goods and not so goods very well so ya know what to expect. Still haven’t released a project yet but perhaps very soon…
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I think hope for a next release is a major mistake, Epic Games should focus on, at least 1 release per year that gets fixes and more fixes and more fixes and optimizations. We can dream all we want with future releases but if we don’t have a solid base it’s impossible make anything. We just keep jumping to the next with the hope to not get crashes in our products.
5.0 - 5.0.1 - 5.0.2
5.1
STABLE BRANCH: 5.2.0 - 5.2.1 - 5.2.2 - 5.2.3 - 5.2.4 - 5.2.5 … etc until 5.6 (next stability branch or so)
5.3
5.4
5.5
etc…
Man we can use the non stable versions to develop future features internally until we get the next stable and “long term” fixes.
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Atleast you can open UE, i dont know why but after the newest version for me EVERY version started crashing on my new pc
man this comedy. real nice. so 5.4 is the better option for your stuff 
Getting crashes and issues with Mega Lights, so going back to 5.4 . . 
I’m getting ~90fps in the default 5.5.4 3rd person template with a 4090 and 13900k, something is definitely not right with it.
Turn off lumen, nanite, etc, what do you get? GI is expensive always was, always will be: it’s 3dimensions..
Did you find any ways to improve the performance?