Every GPU number traces to a real run of the CUDA source below on an NVIDIA RTX 4090 (via run_gpu_job). No projected/modeled numbers.

· CUDA source (GEN-1 brute): gpu_bench_gen1.cu
· CUDA source (GEN-2 fair-broadphase, box vs compound): gpu_bench_gen2.cu
· Raw results: gpu_results.json · gen2_results.json