Var18 wrote: Mon Nov 18, 2024 10:58 pm
@posila I'm sorry to see you feel so criticized and defensive about this issue, perhaps you are once bitten twice shy about interacting with the community demanding a fix. It's tough to be a dev and prioritize things! That said, I think your defensiveness has clouded your judgement a bit—you seemed to think we are demanding super high quality performance and optimization for macOS even with bad hardware. I think it's clear from this thread we are reporting unexpectedly below average performance with external monitors... this seems like a weird edge case instead of some fundamental macOS optimizations, especially since it is happening on brand new saves with very few sprites.
Thank you for the support. Yes, my perception of things is definitelly clouded, that's without question. So I am sorry for overreacting to things.
Anyway, I am not saying there is not an issue with external displays on macOS, but I have not been able to reproduce it (and fair, maybe it would be good idea to ask StrangePan to help reproduce it). Also from the data in this thread (logs/screenshots), I can see there is an issue with rendering in high resolution (resolution higher in 1920x1080, both built-in and external displays), due to more demanding rendering subsystem of 2.0.
Only data about rendering in FullHD-ish resolution on external display is from wormeyman (
viewtopic.php?p=622668#p622668) and it doesn't show any issue, and also he posted data from 4K external display with Render in native resolution disabled, which I have been recommending macOS users to disable, until we add alternative options. And that (
viewtopic.php?p=622672#p622672) also shows 60 FPS. ezekiel and Teralink said they observe the issue on 1080p external screen, but have not provide any logs or screenshots, so I don't have any data supporting that the external display is related to their issue. Other people said, that disabling Render in native resolution or lowering resolution of their display fixed the framerate issue.
You use external ultrawide display. What resolution does it have? I wouldn't expect problems on 2560x1080 (unless you configured macOS to render in higher resolution and downscale) but on 3440x1440 and higher, I would expect framerate issues.
So, I don't know if there is an issue specific to external displays, I can see wide spread issue with rendering in high resolution - which is not even limited to mac, it's just that the Apple Silicon macs have combination of high resolution display and GPU such that mac players are affected by this much more than players on other platforms. And I feel, like improving this will benefit most players (not only macOS players) including you with the ultrawide display. And it will remove strong signal from the data, so that issues specific to external displays will be more visible and easier to analyze.
(There are also reports about FPS being OK-ish until Gleba, and yeah, all space locations use new effects, everything has its own gimmick, Gleba is super heavy on effects ... I am gonna add more options to disable effects, but other than that and Resolution scaling option, I don't think there will be any rework of Gleba or anything like that)
Anyway, this week I hope to roll out "Occlude light sprites" option, this is the new rendering behavior in 2.0, which caused more demanding rendering globally for all sprites, so even in vanilla 2.0. Disabling it should increase the 2.0 and Nauvis rendering performance to 1.1 levels at cost of lights "shining through" objects above them and tiles (lava) not glowing at all. I though I'll need to implement alternative light effect for lava, but Vulcanus has quite bright nights, so lava not emitting any light doesn't look that bad, so I'll do that sometime later.
There will be also "Additional terrain effects" option, which should increase Gleba rendering performance when disabled.
And I also found big performance problem with querying GL_TIMESTAMP on macOS. We use it to time how long did GPU take to process some operations, Apple's OpenGL never implemented it (it always return 0) so I was surprised it was taking non-trivial amount of time on macOS and probably caused CPU to wait for GPU when it didn't need to.
Render scaling is still in works. It's little bit complicated. Hopefully next week. After that I am gonna start collecting data for the external display issue, and improve default values for graphics settings.
EDIT: Also, I am aware, some people mention random stutters even with "Render in native resolution" disabled. Still I want to remove the "strongest signal" first, we have random FPS stutters reported from other platforms too.
). If I disable "render at native resolution" then obviously the problem is resolved, but the UI becomes unreadably blurry and headache inducing.