add convex hull 3d benchmark

[franciscod]

No description provided.

[Calinou]

Tested locally, it works as expected.

For reference, I get these results on a release build with an i9-13900K:

Is it expected that there's little difference between any of these tests in terms of runtime?

[franciscod]

I got some more variance on an older laptop -- around 2000ms for the quickest and 3500 for the more complex. Maybe it would make sense to tweak the benchmark parameters a bit? I'm not very familiar with the convex hull algorithm used here and its performance characteristics.

[franciscod]

Results on a Mac Mini (M2):

Godot Engine v4.2.1.stable.mono.official.b09f793f5

[franciscod]

And here are the results from the laptop on which I originally calibrated the benchmark:

"system":{"cpu_architecture":"x86_64","cpu_count":4,
"cpu_name":"Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz",
"gpu_name":"Intel(R) HD Graphics 520 (SKL GT2)","gpu_vendor":"Intel","os":"Linux"}

AC plugged in (performance mode):

Battery (power saving mode):

(also Godot Engine v4.2.1.stable.mono.official.b09f793f5)

[Calinou]

Let's go with these benchmarks for now and see if they need to be improved if there's lots of variance on the benchmarks server.

Thanks!

[franciscod]

I just noticed that these benchmarks weren't working. Follow-up PR soon!