FetchOptions withLimit() does not reduce query execution time (Google App Engine)

Question

Problem

Running a datastore query with or without FetchOptions.Builder.withLimit(100) takes the same execution time! Why is that? Isn\'t the limit method inte

Answer 1

FWIW, you shouldn't expect meaningful results from datastore performance tests performed locally, using either the development server or the datastore emulator - they're just emulators, they don't have the same performance (or even the 100% equivalent functionality) as the real datastore.

See for example Datastore fetch VS fetch(keys_only=True) then get_multi (including comments)