mrjasonn

> Testing Sodium's `1.21.4/stable` and `1.21.5/stable` branches and this PR I wasn't able to find a change in any direction beyond measurement noise on my macOS system. (intel 10900K, RX...

> I've tested this with 1662 item frames and I can in fact now measure a fps regression between the `1.21.4/stable` and `1.21.5/stable` branches (75 fps down to 57 fps)....

@douira go see RaphiMC/ImmediatelyFast#279, it may give some useful information on this, as ImmediatelyFast also had their fast buffer upload optimisation enabled for Apple GPUs at some point before Mojang...

If it also happens on vanilla, then I'm quite sure it's an April Fools thing and wouldn't be an Iris Shaders bug.

Sodium 0.6 will include official support for the Fabric Rendering API anyways, which will probably release soon with Minecraft 1.21