@usedarkroom trying to develop a proraw image in your app, one thing i noticed is that the highlight slider is broken. sliding left or right does nothing?
So it's true Apple intentionally slow down old iPhones. Proof: My iPhone 6 was bought 3years ago and recently got really slow. APP 'CPU DasherX' shows iPhone CPU is under clocked running at 600MHz. After a iPhone battery replacement. CPU speed resumed to factory setting 1400MHz.