copy(slice) O(n^2) python time regression - #18081
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adds ~1 minute to llama 8b startup time, the regression is also visible in the LLAMA_LAYERS=2 CI job
previously view.buffer was cached,
after #17913
contiguous_view()is recomputed.It can be fixed by caching
def contiguous_view, but i wanna first track down why it's called so many times.