iOS Question Memory size of an object

[mrred128]

I have created an app that generates rather large map arrays. Is there a way to find out how large an object actually is in memory?

 

[Erel]

Unless you are storing images then it is unlikely that the map is really large (how many items are in the map?).

There is no way to find the object memory size.

 

[wonder]

There is no way to find the object memory size.

Wouldn't it be possible just by doing the math?
Each Boolean/Char (in a string) = 1 byte, Each short = 4 bytes, Each Int/Float = 8 bytes, Each Long/Double = 16 bytes, Each ARGB Pixel (in an image) = 4 bytes*

*Note: The image size would probably be smaller, due to compression. For a rough estimate, if you know the compression rate, just do the math.

Note that bitmaps are not compressed in memory.

 

[Erel]

My point is that it is unlikely to be a real issue. However we must wait for more information to be able to determine it.

*Note: The image size would probably be smaller, due to compression. For a rough estimate, if you know the compression rate, just do the math.

Note that bitmaps are not compressed in memory.

 

[wonder]

Note that bitmaps are not compressed in memory.

Thank you! I've learned something new today!

 

[mrred128]

I asked the question beceause I have no idea of the overhead. My maps tend to be several thousand in records and they contain documents. Java has abilities to do this, but I have no idea on how objective-c does this, if at all.

 

[Erel]

Java has abilities to do this

It is not trivial at all to get the object size in Java.

What are the records made of? What do you mean with documents?