What happened?

Release notes for 1.1.4 said:

Fixed a performance drop with shaders disabled compared to base Sodium - Iris with shaders off should no longer measurably decrease performance

Unfortunately, Iris still notably affects performance in disabled state.

My test case is breaking a single chest filled with items and then picking them up. I tested in Singleplayer Creative, standing far enough from the chest so that I don't pick up any of the items right after breaking the chest. Then I ran into the items to pick them up.

1. Water Bottles (ie. a single item per chest slot)
   With Sodium, breaking a chest full of Water Bottles wasn't noticeable at all.
   Picking them up wasn't noticeable at all.
   With Sodium + Iris, breaking a chest full of Water Bottles caused only a small hiccup.
   Picking them up also caused a small hiccup.

2. Nether Wart (ie. 64 items per chest slot)
   With Sodium, breaking a chest full of Nether Wart caused a small hiccup.
   Picking them up also caused a small hiccup.
   With Sodium + Iris, breaking a chest full of Nether Wart caused about a 1s lag.
   Picking them up literally froze my game for 2 seconds.

Screenshots

No response

Relevant log output

No response

Minecraft Version

1.18

Iris Version

iris-mc1.18.1-1.1.4.jar

Sodium Version

sodium-fabric-mc1.18-0.4.0-alpha5+build.9.jar

Operating System

Windows 7

What is your GPU?

AMD RX 580

Java Version

17.0.1.12.1

Additional context

No response

Please avoid talking about user preferences in the issue tracker.

just saying update windows dude

why did you delete my comment?

This does not occur at all on 1.16.5, the frame graph stays completely flat. Needs confirmation on 1.17+, might be different there for whatever reason.

Cannot replicate with just Iris and Sodium.