1.At present, read_json_by_line and fuzzy_parse are used for json format writing, and the performance of streamload writing will decrease. It is modified to strip_outer_array and fuzzy_parse writing, and the speed is increased by about 3 times. 2.Add csv writing, the column separator is set to \x01, and the row separator is set to \x02, the performance is about 5 times higher than before