Quick test of compressing random data with/without shuffling

lz4-shuffle-example

In [20]: import numpy as np
    ...: import lz4.frame
    ...:
    ...: a = np.random.randint(2**16, size=1_000_000, dtype=int)
    ...: buf = lz4.frame.compress(a)
    ...: print("Compressed size without shuffling:", len(buf))
    ...:
    ...: shuffled = a.view(np.uint8).reshape(-1, 8).transpose().copy(order='C')
    ...: buf2 = lz4.frame.compress(shuffled)
    ...: print("Compressed size with shuffling:   ", len(buf2))
    ...:
Compressed size without shuffling: 4077762
Compressed size with shuffling:    2025044