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Summary:
I'm using CGImageCreateWithImageInRect() to tile a massive image (e.g. 16,000x9,000px). This has worked nicely in the past, since this function hasn't attempted to decode the entire image.

However, on an iPhone 6 the device now runs out of memory when using this approach. Please note that the exact same code, on an iPhone 5 or iPad mini (1st gen), both running iOS 8, works flawlessly. This is especially interesting since the iPad mini has only half the RAM.

Steps to Reproduce:
1. Open the attached example project
2. Run the example on an iPhone 5 or iPad mini running iOS 8
3. Keep an eye on the memory gauge

Expected Results:
1. The output "Tiling..." appears in the console
2. The output "Tiling complete. Data length: 72806" (data length may vary)

Actual Results:
1. The output "Tiling..." appears in the console
2. The device hangs and/or crashes, presumably because the device runs out of memory

Version:
iOS 8 (12A365)

Notes:
Devices that passed the test: iPhone 5, iOS 8 (12A365), 16GB and iPad mini, iOS 8 (12A365), 16GB

Configuration:
iPhone 6, 64GB

Attachments:
'ImageTiling.zip' was successfully uploaded. (http://cl.ly/3i2d3A2t2x2E)