Read speed of SharedPreferences

android performance sharedpreferences
GLee picture GLee · Oct 3, 2013 · Viewed 11.5k times · Source

How fast are SharedPreferences? Is there a way to put them in memory for reading? I have a small amount of data that a ListView has to query to display each cell, and I'm worried that a call to flash memory will be too slow. I'm not worried about write speed, as writes will happen infrequently. I'm considering just using a JSON object to persist the data instead of SharedPreferences. Any thoughts?

Answer

CommonsWare picture CommonsWare · Oct 3, 2013

Is there a way to put them in memory for reading?

They are in memory, after the first reference. The first time you retrieve a specific SharedPreferences (e.g., PreferenceManager.getDefaultSharedPreferences()), the data is loaded from disk, and kept around.

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