I did a very very ugly quick hack in python. Took the example JSON, made the one list entry a string (lazy hack), repeated it 56,000 times. That resulted in a JSON doc that weighed in at 10M. My initial guess at 60,000 times was a pure fluke!

Dumped it in to a very simple sqlite db:

    $ du -hs gta.db
    5.2M    gta.db

Even 10MB is peanuts for most of their target audience. Stick it in an sqlite db punted across and they'd cut out all of the parsing time too.