I'm creating an app which needs to handle 150mb of JSON files I got from an API.

In that JSON is a product data. Sometimes I need to update some property on all objects or on some objects based on conditions.

Some of my users reported to me that the app "stuck" but most of them did not report to me that, maybe just use smaller data.

I just need to know how to handle 150mb JSON data. What's the best way to do that? What's the average memory at the user side needed to work smoothly?

Storage is limited to 5MB only so its not the solution. Currently I save JSON in variable called 'collections'