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сообщение · 2026-01-26 11:00 UTC
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aaaa llll-ある在饿死的边缘徘徊
根本原因在PyTorch.compile的loop是还是跑在Python上面的，只是编译成了C++的C Extension。层次一深cuda->c++->python->c++->cuda的路径上面python段会产生很多开销。 jax.jit编译之后整个函数就都完全不在Python里面跑了，层次深浅对整体影响不大。 (23年的测试了，不知道现在PyTorch有没有优化过了）

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