A GPU kernel is the code that runs on the GPU when you call an operation like torch.matmul, as thousands of copies at once.
Numba 的核心目标之一是与 NumPy 实现无缝集成:它把 NumPy 的 ufunc 调用映射为等价的原生代码,将数组索引降级为直接内存访问,并允许你用纯 Python 实现速度媲美 C 扩展模块的 ufunc/gufunc。
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