Tesing code for HamsterDB, python bind.
Big file may slow down HamsterDB.(QPS 70 around 5,000,000 kvs)
So test_write_en() / test_read_en() use pre-hash (mmh3).(QPS 300K around 5,000,000 kvs) That is not true, I made a mistake in my code and QPS i[......]