It’s implemented in Python, but it is using existing Python libraries which themselves are implemented in C, etc. Notably it uses both Taichi and Numba, which

It’s implemented in Python, but it is using existing Python libraries which themselves are implemented in C, etc. Notably it uses both Taichi and Numba, which compile code expressed in (distinct restricted subsets of) Python (much broader in Numba’s case) to native CPU/GPU code including parallelization.