Worse perfomamce compare with Optifine ( -20 FPS with iris and with shaders)
For example, when i use SEUS PTGI HRR 3.0 shaders, i get 65-70 FPS with Optifine, but when i use Sodium + Iris, I get 30-40 FPS. I tried to Update my GPU driver, to reinstall minecraft, to use Simply Optimized modpack and etc, but nothing helps. Please guys, help, i cant play with forge and optifine.
I turned off msi afterburner, tried to use different shaders, made sure that V-sync was turned off everywhere, installed ImmediatelyFast, nothing helps
using optifine i got 140 fps with BSL, 135 fps with complementary, 450 fps without shaders
using Sodium and iris i got 125 fps with bsl, 110 fps with complementary, 700 fps without shaders
the location and look were identical, I turned around everywhere to download all the chunks.
21 Replies
Iris is not guaranteed to give you an fps boost over optifine everywhere, but it does seem to give you better fps at default Minecraft
Disable shaders and see if you're getting more performance than optifine with sodium
"450 fps without shaders" (optifine)
"700 fps without shaders" (sodium + iris)
They seemed to have already done that
didn't read clearly enough
Well anyway then it's probably a iris performance thing, but i get far more performance on Iris than optifine
maybe it's a per machine thing rn?
Even I don't get any performance improvements on Iris with Shaders, I do use the alternate mods that replace Optifine's features, except for Colormatic which doesn't support 1.20 and I mostly get the same fps on Iris, but more memory usage and some scenes are more laggier.
But without those mods, I think I can a very subtle boost of fps over Optifine; but I definitely need those mods because I mostly use Minecraft just to debug my texturepack
A big thing about iris vs optifine is that Iris leave sthe vanilla game untouched, aka it doesn't change any vanilla behavior
Oh yeah, no dynamic lights and stuff and zoom
no, there's stuff like optifine literally changing chunk generation, etc to the point of being banned from speedruns
Oh that way..
because you'd get different worlds based on whether you had optifine or not
Really? That's interesting
GitHub
Bug: "Fast Math" option changes world generation · Issue #1530 · sp...
The "Fast Math" option causes blocks to generate a bit differently. I haven't observed it causing big changes, rather minor differences in block type boundaries, especially in caves. ...
https://github.com/sp614x/optifine/issues/5583
not to mention issues like this
GitHub
Optifine changes position diference by 1e-4 · Issue #5583 · sp614x/...
If the anticheat fails due to a position difference of 1e-4m (1mm), then it has some problems. It should have a tolerance for player actions that is well above 1mm, probably 10cm or something. Orig...
It's mostly the fast math and other "fast" stuff that's an issue
But isn't Iris also not allowed on speedrun.com?