Reduce Memory Usage in iOS App without leaks

Question

My iOS app has high memory usage but no memory leaks. How do I reduce the memory usage.

Using Instruments, I discovered that my app maxes out at 90MB, before a memory warning occurs, and other memory is deallocated, and then it stays around 55-65MB for the rest of its usage.

I feel that 55-65MB is too high, right?

Since, Instruments did not catch any leaks. What can I do to reduce this memory usage?

I went through this year's WWDC video, but of the stuff I understood (this is my first iOS app), it mostly covered dealing with leaks.

Some possibly useful information:

VM: ImageIO_GIF_Data 30.35MB Live Bytes | 115 Living | 300 Transient | 136.12 MB Overall Bytes

VM: MappedFile 36.04 MB Live Bytes | 16 Living | 11 Transient | 36.09 MB Overall Bytes

All the other stuff is under 1MB

My app downloads around 30 GIF files from the internet, I use SDWebImage, and I just save the URLs of the images, and SDWebImage does the rest. :P

Thanks in advance,

From An iOS Memory Management First Timer

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Thanks once again for you help

Answer 1

You say you are using a table view. Although cells are reused automatically, this makes it very easy to make mistakes and create too many objects. 1 common error is allocating objects (eg. UIImageView) in the cellForRowAtIndexPath method, as this means every time a cell is reused a new UIImageView is added to it as well as keeping the old ones. So double check what is going on in your cellForRowAtIndexPath method.