Ensure the majority of users get good performance

[peppy]

Performance is already in a pretty good place for modern hardware.

That said, there's a lot of edge cases when OpenGL doesn't (and can't) perform well. In stable, we had compatibility mode to cover this. In lazer, we will also have something similar, but it will be a first-class implementation of DirectX (and maybe vulkan / metal by extension). In other words, the game would prefer DX over OpenGL on platforms where that makes sense, ie. windows.

We should also do a general performance pass on other non-GPU aspects, although I've already been doing that over time and we aren't in such a bad place.

[smoogipoo]

Related: ppy/osu-framework#4909

[VocalFan]

I'd like to add my two cents. I'd recommend Vulkan as it's a lot more cross-compatible (DirectX is windows focused), and often has a bit better performance than DirectX. As can be shown below with Rainbox Six Siege's performance difference.

Along with this, as mentioned earlier, DirectX is a strong Windows focus, while Vulkan supports a multitude of devices. Windows, Mac (With a MoltenVK layer), Linux, Android, and iPhone. I believe it'd be easier to just code Vulkan and MoltenVK, instead of maintaining DirectX with two conversion layers. (DX to VK, VK to MoltenVK, or DX to Metal)

[smoogipoo]

Thanks, but we don’t need more opinions in this. We have a path forward that will satisfy the requirements for all platforms.

[peppy]

I'm going to close this as I think we're basically "there".

Of note, there are still remaining optimisations we have in the pipeline (ppy/osu-framework#5952, ppy/osu-framework#5757, ppy/osu-framework#5757 + atlas size bump) which will improve things further.