The tests /BulkOperation/numerous_ordered and /BulkOperation/numerous_unordered each execute 3 bulk operations that are over 4 times the max batch size. That was a bit time-consuming when the max batch size was 1000, but with 3.6's batch size of 100k, the two tests take almost a minute each to do 100k * 4 * 3 = 1.2 M operations.

Is it expected that each test takes almost a minute to do 1.2 M operations? Seems slow compared to my rule of thumb that a driver can do 50k simple operations per second on localhost, that should take less than 30 seconds.