MySQL.
0.6351931095123291 seconds Took 0.6369011402130127 seconds Took 0.6405549049377441 seconds Took 0.655562162399292 seconds Elapsed 0.6603209972381592 seconds One surprising thing to notice is that in a single connection, inserting 500 rows was taking close to 1 second. Here, even with 5 concurrent