google app engine - Performance of Objectify filter -


i have api based on google app engine , datastore. using java , objectify framework. have entity , want able queries involving it. have 1 simple question.

is using .filter() (speed, performance, cost) .id()?

i guess using id() better when possible in many cases client may not have entities ids.

id better query, should design used whenever possible:

  • it consistent
  • it faster

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