How do I read int mem?

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Reading the file is more or less fast, what takes time is your for each item in list loop... how to you display your data? Why do you need that loop? You might want to redesign your app... this might help

[Guide] How to use RecyclerList extension with large data sets - Basic guide

RecyclerList extension makes it easy to efficiently display large sets of data. You supply the data and define how each item looks, and then the RecyclerView library dynamically creates the elements when they're needed. As the name implies, RecyclerView recycles those individual elements. When an item scrolls off the screen, RecyclerView doesn't destroy its view. Instead, RecyclerView reuses the view for new items that have scrolled onscreen. This reuse improves app’s performance and responsive…

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