Whenever I look towards the forest biome, my GPU usage sky-rockets.
Much to the point where video that I am playing from YouTube in my browser starts to lag because the GPU usage hits 100%.
When I look away from the biome, my GPU usage goes back to normal.
It happens even when the biome is obscured, so by just looking in the direction of the biome.
I have also attempted to use OptiFine, but the issue persists.
I recreated the world that I am playing in, and the same thing happens.
My base is right next to the biome. 🙂
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Would MC-148095 happen to describe your issue?

I don't think it's the same as MC-148095 one is FPS one is GPU or they both have anything to do with it

above is in the forest
Below is not in the forest
Also affects 1.19 Pre-1

Thank you for the additional verification Sculk man.Â
Avoma, as Sculk man has said, it isn't about frames, no. My frames remain 40+ whilst looking towards the biome, however my GPU usage hits 100% at times causing Desktop lag.
Here is a video that I have made, it is what the screenshots are of: mc java forest biome high cpu usage - YouTube
It is to be noted, this forest biome is rather a large one, and goes on for a lot of blocks.
Cheers,
Nick

I mean, this is rather expected due to the amount of leaves in forests (specially w/ fancy graphics since they are transparent), so i don't really think there's any abnormal behavior here. It also doesn't help that you're using a resource pack with bushier leaves, making them even more detailed.

It does the same thing even without any datapacks. I have removed them all to test, and still it can hit 100% GPU usage. Also, this should not happen on the RTX 3070, in minecraft, without shaders. Not even Elden Ring, or any other game does this.

You can't compare both games as they work completely different. I'm just saying in terms of how Minecraft works this is to be expected as the game is rendering a lot of faces in the distance. If Mojang were to implement a LOD system it could help to mitigate the GPU overhead in these situations.