The startup times are a fair bit worse, and the memory requirements are a fair bit higher. Despite everything else python does tend to be fast enough, and the w

The startup times are a fair bit worse, and the memory requirements are a fair bit higher. Despite everything else python does tend to be fast enough, and the worse startup/memory usage isn't necessarily worth it. Also it doesn't speed up things that rely on external C libraries, so code using numpy/scipy/tensorflow/etc doesn't generally run appreciably faster.