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for ipad
e.g.
for pixel size 10×10 image, how much memory is used?
provide some other contribution:
usually for a normal iPad, it start with app-usable memory of 190-200mb
this number decrease if background process / other apps is running
many thanks!~~~
10 x 10 x 4 = 400bytes for that image, so it’s 4 bytes per pixel. (GRBA).
Also it is normal for background app to take some memory. iOS will free memory if needed by any app.