javascript - Backbone.js - Filtering a large JSON file -

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i building backbone application display list of contacts. have followed tutorials online, , followed model of loading entire list of contacts memory in 1 go, filtering results user enters values textbox. there 10 - 12 attributes of each contact , data needs filtered 3 of them. example: name, location , zipcode

the problem when data set gets large. if run application json file containing 5000 users becomes prohibitively slow. techniques can employ around problem? need sort json data? else can do?

i hope question not vague , have explained situation sufficiently.


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