Another update. Last night, I spent 3 hours imaging. Nothing different in my setup, EXCEPT I decided to check the boxes to once again use the flat, dark, and bias calibration frames. Lo and behold, I imaged several targets for a duration of 20 minutes each and stacked 95-100 subs in each stack. No slowdowns whatsoever.
This morning I checked my iPad and it had updated to IPad OS 15.6.1 since my late August sessions. It's possible the stacking slowdown issue I experienced is tied to iPadOS 15.6 and the 15.6.1 has corrected it. Looking through Apple's release notes I found they made some iPadOS updates relating to image processing:
_**ImageIO
Available for: iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation)
Impact: Processing a maliciously crafted file may lead to arbitrary code execution
Description: A logic issue was addressed with improved checks.
CVE-2022-32802: Ivan Fratric of Google Project Zero, Mickey Jin (@patch1t)
ImageIO
Available for: iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation)
Impact: Processing a maliciously crafted image may lead to disclosure of user information
Description: An out-of-bounds read issue was addressed with improved bounds checking.
CVE-2022-32830: Ye Zhang (@co0py_Cat) of Baidu Security
ImageIO
Available for: iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation)
Impact: Processing an image may lead to a denial-of-service
Description: A null pointer dereference was addressed with improved validation.
CVE-2022-32785: Yiğit Can YILMAZ (@yilmazcanyigit)_**
I left Auto White Balance unchecked but I'll reenable it next time I set up and see what happens.
