Mobile UI Performance Tips | Unreal Fest 2024

[@tom.looman]

Jeez what a comments. I found this very interesting, especially the new global invalidation for slate which is super useful! (a lot of this seems non mobile specific to me)

[@Miru302]

I wonder if some posters either hate with passion or prompted with "make a negative and nonconstructive comment full of hate that doesn't welcome discussion, make it look human".

[@OriginRow]

Fix vulkan issues

[@arudenka]

I would say all of technics showed there are useful for non-mobile UIs too.

[@OrizonGames1]

Hey I am the first one to comment❤🎉

[@hatty101]

Vulkan is broken with swappy frame pacing tool. Fix it. It cap your Game to 30fps

[@philzan3627]

2:20 not true, empty tick nodes or even false branched to empty have no impact on performance at all.

[@DaDarkDragon]

Source for your claim?

[@philzan3627]

​@@DaDarkDragon I did lots of performance testing on numerous scenarios including the fabled tick-tick-boom they keep yammering about and I have never seen any actual performance drop. You could argue "it drops performance by like 1%" but it is so negligeable, it is not worth mentioning. There's tons of tests you can find on the slackers' discord that they don't talk about. Like how validated gets are 17% faster than "isValid" nodes, or that the cap for widgets is 74 instances before seeing 10 fps drops.

[@philzan3627]

@@DaDarkDragon For some reason my responses are getting filtered. Anyways, it's all from benchmark tests. You can easily do it yourself and measure it with their own unreal engine profiling tools.

[@shannenmr]

Empty Blueprint Class Ticks (Slate/UMG is possibly different) that have _never_ had anything attached to them are disabled by default but up until the latest release of UE if they had ever had something attached to them which later got un-connect they will continue to run the empty tick if you don't do and remove the node. In regards to UI specifically apparently If you create a C++ child class of UserWidget that you know you don't want to tick (99.99% of the time) you need to use the meta specifier "DisableNativeTick" or it tries to be helpful and still (half?) ticks when used even if you later disable tick in BP.

[@OriginRow]

Update Browser

[@BrutalFoX.]

Huge fps loss 5.5 in an empty scene compared to 5.3 , how about you fix that?

[@hatty101]

Only UI? are you afraid of talking about render performance? such a desperate dogs. fix your terrible mobile performance or do not bring the topic to act as if you guys care.

[@ryanjdev87]

Lolololol

[@hatty101]

@ryanjdevlin87 yeah fr

[@hatty101]

Fix mobile package size. Come on do something good for in for god sake. Unity is far superior in size not coz it's Unity but because they care for mobile. Unreal team can do it. Unity can get package size even to 9mb. Yet your mobile with EXTREME tweaking and modifications and edits and tons of options still barely get you to 40mb. That's 3 times bigger. It scale worse as well. DO SOMETHING RIGHT NOW