Preserving objects/variables in non-volatile storage

SUMMARY

Though I lack extensive programming experience, I am currently developing a hybrid mobile app with Cordova. The app will contain a substantial amount of static data which needs to be referenced periodically for basic operations. As the volume of objects is expected to reach close to 10,000, I am concerned that this may overload the device's memory.

My initial idea is to store the static data in local storage instead of declaring individual objects within the code itself. By utilizing a JSON file, I can access and reference the required information during each iteration of my loop without putting excessive strain on the device's RAM.

DETAILS

• Development tools include typescript and Cordova.

• Anticipating handling tens of thousands of static objects.

• Objects will adhere to specific interfaces as templates.

• Few objects will be accessed for information every minute.

• Basic operations will be carried out based on this information.

• Object IDs may need to be stored permanently for future use.

• Operations dictate which objects are referenced next.

INQUIRIES

I seek clarification on how objects are stored and whether the projected number of objects could overwhelm a mobile device's RAM capacity. Is it viable to store all static data in a JSON format and then selectively reference objects from the file when needed?

jsoncordovatypescriptmobilestorage

Answer №1

It's important to understand that modern operating systems do not always directly map an application's memory to the hardware RAM.

Imagine having a phone with only 256MB of total RAM, and your application ends up loading 128MB of data into memory. Does this mean you can only run one more application that requires 128MB of memory? What about the OS using memory itself? The truth is, the OS will transfer some data from RAM to secondary storage like a solid-state drive, creating space for your app and other apps to function efficiently. If the data moved out of RAM is needed again, the OS can retrieve it from the SSD back into RAM through a process known as paging. This complex system adds to the efficiency of the operating system's memory management without requiring manual intervention by your application code.

While the OS does handle memory allocation well, it is still beneficial to write memory-efficient code especially on mobile devices.

In the case of your example, storing static data in local storage is a good initial step. However, there are potential drawbacks to be wary of along with questions that should be addressed:

  • Is it possible to split the data so that only necessary parts are loaded at a time?
  • Can the data be stored in a more compressed structure such as Tries?
  • How often will the data need to be retrieved from local storage?
  • Could retrieving data from local storage cause delays, particularly if a loop performs numerous iterations each requiring extensive data retrieval?

Wishing you success in optimizing your memory usage!

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