Bevymark 3D (#22298)

# Objective

- Add a stress test that exercises the 3d mesh pipeline for dynamic
scenes.
- Large static scenes like caldera hotel don't expose performance issues
when many meshes are moving.
- Give us a way to benchmark PRs like
   - #22297
   - #22281
   - #22226

## Solution

- Make a 3d version of `bevymark`, sticking to the existing patterns as
closely as possible.

## Testing

<img width="1072" height="684" alt="image"
src="https://github.com/user-attachments/assets/41214ba9-ffad-471d-a320-1f007490dead"
/>

---------

Co-authored-by: Carter Anderson <mcanders1@gmail.com>

Author: aevyrie

Cargo.toml

@@ -3315,6 +3315,17 @@ description = "A heavy sprite rendering workload to benchmark your system with B
 category = "Stress Tests"
 wasm = true
 
+[[example]]
+name = "bevymark_3d"
+path = "examples/stress_tests/bevymark_3d.rs"
+doc-scrape-examples = true
+
+[package.metadata.example.bevymark_3d]
+name = "Bevymark 3D"
+description = "A heavy 3D cube rendering workload to benchmark your system with Bevy"
+category = "Stress Tests"
+wasm = true
+
 [[example]]
 name = "many_animated_sprites"
 path = "examples/stress_tests/many_animated_sprites.rs"

examples/README.md

@@ -518,6 +518,7 @@ cargo run --release --example <example name>
 Example | Description
 --- | ---
 [Bevymark](../examples/stress_tests/bevymark.rs) | A heavy sprite rendering workload to benchmark your system with Bevy
+[Bevymark 3D](../examples/stress_tests/bevymark_3d.rs) | A heavy 3D cube rendering workload to benchmark your system with Bevy
 [Many Animated Materials](../examples/stress_tests/many_materials.rs) | Benchmark to test rendering many animated materials
 [Many Animated Sprites](../examples/stress_tests/many_animated_sprites.rs) | Displays many animated sprites in a grid arrangement with slight offsets to their animation timers. Used for performance testing.
 [Many Buttons](../examples/stress_tests/many_buttons.rs) | Test rendering of many UI elements