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…ayBuffer is available - Load jolt-physics.multithread (same version, 0.39.0) when SharedArrayBuffer is available, with up to 4 worker threads, and fall back to the single-threaded build. - The contact listener is called by the worker threads during the step, where the game objects don't exist: it now only writes the contacts into a buffer of the WebAssembly memory (also given to the workers with configureWorkerScripts), read after the step to call onContactBegin/onContactEnd. - Enable SharedArrayBuffer in Electron, as previews are not cross-origin isolated. - Optimize the broad phase before a step when many bodies were added.
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⏱️ Game engine benchmarks:
|
| Benchmark | Base | This version | Change | Range between rounds | |
|---|---|---|---|---|---|
| Scene: Static sprites (10000) | 4.543ms | - | - | - | |
| Scene: Moving and rotating sprites (5000) | 6.219ms | - | - | - | |
| Scene: Collisions and separation (500 vs 500) | 15.4ms | - | - | - | |
| Scene: Physics 2D (500 bodies) | 3.327ms | - | - | - | |
| Scene: Physics 3D (500 bodies) | 11.8ms | - | - | - | |
| Scene: Platformer characters (300) | 0.994ms | - | - | - | |
| Scene: Text updates (1000) | 53.5ms | - | - | - | |
| Scene: Objects creation and deletion (100 per frame) | 1.777ms | - | - | - | |
| Scene: Heavy events (variables, loops, strings) | 1.484ms | - | - | - |
All the 31 benchmarks and how they are measured
| Benchmark | Base | This version | Change | Range between rounds | |
|---|---|---|---|---|---|
| ≈ | platformer objects jumping in loop(1000x) | 127.9ms | 118.9ms | -7.0% | -11.5% to +8.9% |
| ≈ | hitBoxesCollisionTest of 10 objects with 10 objects(10000x) | 82.8ms | 82.3ms | -0.6% | -2.5% to +7.5% |
| ≈ | hitBoxesCollisionTest of 30 objects with 30 objects(1112x) | 25.7ms | 26.4ms | +2.9% | -16.6% to +11.5% |
| ≈ | hitBoxesCollisionTest of 100 objects with 100 objects(100x) | 8.305ms | 9.701ms | +16.8% | -21.8% to +31.9% |
| ≈ | hitBoxesCollisionTest of 500 objects with 500 objects(4x) | 1.874ms | 1.970ms | +5.1% | -0.1% to +45.6% |
| ≈ | hitBoxesCollisionTest of 1000 objects with 1000 objects(1x) | 1.029ms | 1.095ms | +6.4% | -1.9% to +34.4% |
| ≈ | hitBoxesCollisionTest of 1 object with 1000 objects(1000x) | 52.8ms | 52.6ms | -0.4% | -5.2% to +6.0% |
| ≈ | hitBoxesCollisionTest of 10 objects with 1000 objects(100x) | 11.4ms | 10.9ms | -4.6% | -6.1% to -2.4% |
| ≈ | hitBoxesCollisionTest of 1000 objects with 1 object(1000x) | 57.2ms | 55.5ms | -3.1% | -11.1% to -1.2% |
| ≈ | hitBoxesCollisionTest of 500 objects with themselves(4x) | 1.309ms | 1.310ms | +0.1% | -1.5% to +3.5% |
| ≈ | setAngle and setLength(100000x) | 11.4ms | 11.4ms | -0.1% | -0.3% to +0.4% |
| ≈ | convertCoords(100000x) | 21.4ms | 21.5ms | +0.4% | -0.5% to +1.4% |
| ≈ | convertInverseCoords(100000x) | 21.4ms | 21.4ms | +0.1% | -1.7% to +1.3% |
| ≈ | collisionTest between two overlapping rectangles(120000x) | 47.7ms | 47.3ms | -0.9% | -3.0% to +14.2% |
| ≈ | collisionTest between two non overlapping rectangles(120000x) | 11.2ms | 11.2ms | +0.1% | -3.1% to +7.2% |
| ≈ | getAABB of a non rotated, default center(180000x) | 19.0ms | 19.0ms | -0.1% | -1.7% to +5.4% |
| ≈ | getAABB of a rotated, default center(180000x) | 19.0ms | 19.2ms | +0.7% | -1.7% to +5.3% |
| ≈ | getAABB of a non rotated, non default center(180000x) | 20.2ms | 20.0ms | -0.9% | -2.3% to +1.0% |
| ≈ | getAABB of a rotated, non default center(180000x) | 59.7ms | 61.9ms | +3.7% | -2.3% to +6.6% |
| ≈ | getAABB of a non rotated sprite, with custom hitboxes, origin and center(60000x) | 19.8ms | 19.6ms | -0.8% | -7.5% to +1.0% |
| ≈ | getAABB of a rotated sprite, with custom hitboxes, origin and center(60000x) | 67.4ms | 67.7ms | +0.4% | -1.1% to +1.6% |
| ≈ | get(400000x) | 11.6ms | 11.6ms | -0.0% | -0.1% to +0.1% |
| Scene: Static sprites (10000) | 4.543ms | - | - | - | |
| Scene: Moving and rotating sprites (5000) | 6.219ms | - | - | - | |
| Scene: Collisions and separation (500 vs 500) | 15.4ms | - | - | - | |
| Scene: Physics 2D (500 bodies) | 3.327ms | - | - | - | |
| Scene: Physics 3D (500 bodies) | 11.8ms | - | - | - | |
| Scene: Platformer characters (300) | 0.994ms | - | - | - | |
| Scene: Text updates (1000) | 53.5ms | - | - | - | |
| Scene: Objects creation and deletion (100 per frame) | 1.777ms | - | - | - | |
| Scene: Heavy events (variables, loops, strings) | 1.484ms | - | - | - |
ℹ️ No scene benchmark ran on both versions: their counters (draw calls, objects count and final state) could not be compared.
Comparing 9b30ba5b to its base 608b3de0 (on a pull request, the version tested is the pull request merged into its base), run alternately 4 times on the same machine (AMD EPYC 7763 64-Core Processor, 4 cores, rendering without GPU). Times are the median duration of a batch of iterations (micro benchmarks) or of a frame (scene benchmarks). A change is reported only when larger than 5% and than the differences between the rounds of a same version, and measured by every pair of rounds.
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Repro scene: 453 static
Building Amodels (mesh shape), 1445 dynamicShip Largemodels falling and piling up.Videos
physics3d-monothread-15s
https://github.com/user-attachments/assets/fa5c8308-3596-4c46-b935-6ec796ddeeb8
physics3d-multithread-15s
https://github.com/user-attachments/assets/6c2da90b-d16d-4527-8457-48f818c964a4