Method setup

asv_bench/benchmarks/reshape.py:48–52

(self)

class SimpleReshape:
    def setup(self):
        arrays = [np.arange(100).repeat(100), np.roll(np.tile(np.arange(100), 100), 25)]
        index = MultiIndex.from_arrays(arrays)
        self.df = DataFrame(np.random.randn(10000, 4), index=index)
        self.udf = self.df.unstack(1)

    def time_stack(self):
        self.udf.stack()