[Impeller] Jank when scrolling in ListView with impeller on iOS about flutter HOT 3 OPEN

Debugging this a bit, the cost is evenly split between the rrect blur and the linear gradient shader. The ALU is limiting operations, which I'd expect for rrect blur but gradient is a bit surprising (well, not that surprising). So if we need an example of where some elbow grease is needed for rrect blur or gradient this is probably it.

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Ive been noticing increasing jank in list views, which was only very minor and so subtle as not noticeable in 3.10.x until now its more noticeable and mildly annoying in 3.22. I do have alot of gradients and blurs and images inside my listview

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@mark8044 Without more information (i.e. a full bug report) we won't be able to say if that is the same issue as here.

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