parquet2 vs parquet vs pyarrow

	A	B	C	D	E	F	G	H	I	J	K	L	M
1		Int64			bool			utf8			utf8 (dict-encoded)
2	N rows	parquet2	parquet	pyarrow5	parquet2	parquet	pyarrow5	parquet2	parquet	pyarrow5	parquet2	parquet	pyarrow5
3	1024	52.20579308	98.45349623	1367.108056	52.7364959	101.5418965	693.3575423	65.26138815	115.7926859	744.7892312	66.41646118	116.8911191	864.9297069
4	4096	68.88150808	150.6026913	667.5796885	69.32514455	163.2867763	674.4315815	107.54392	205.5873846	747.6930004	121.9151083	208.8961973	842.9993868
5	16384	102.5049576	349.5167515	862.9138483	117.876358	372.7268891	823.2999717	275.1913697	545.1087363	956.0403105	312.3308202	553.8360391	1100.172081
6	65536	257.7225728	1168.31357	1214.334119	295.712716	1218.59758	1301.848752	909.1571441	1909.094491	1631.846528	1025.807564	1948.412263	2484.447668
7	262144	915.5281455	4555.226575	2787.711321	991.4939663	4670.040495	3036.085598	3365.223747	7505.305326	4773.188906	3989.089566	7502.82104	7529.443354
8	1048576	3584.133362	24161.09712	10054.00979	3824.787742	18762.49365	10127.35813	14429.37148	30637.64675	16778.65161	16000.85516	30499.40009	27672.51154
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