Django processes lookups at different speeds?

Question

JavaScript

merc 1.786775827407837
merce 2.780470848083496
mercede 2.5892601013183594
m 3.8699240684509277
mercede 2.87429141998291
me 5.5031163692474365
mer 6.273527383804321
mercedes 4.885490894317627

I do a search using ajax, but here djnago processes different requests at different speeds, so when a person types in the search field, he does not receive the last result, but the one that was processed longer, how can this be solved?
Ps: the processing time is so long because I was doing tests on the server faster and faster
thanks in advance