From the media's perspective, the profiled result in comment looks also pretty good to me, we didn't drop any frame and as Markus said in comment 16, the actual problem might happen after the composition. Therefore, I will move this bug to gfx to raise more attention from them, to see if anyone from gfx team can help move this bug forward.
Bug 1684662 Comment 19 Edit History
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From the media's perspective, the profiled result in comment looks also pretty good to me, we didn't drop any frame and as Markus said in comment 15, the actual problem might happen after the composition. Therefore, I will move this bug to gfx to raise more attention from them, to see if anyone from gfx team can help move this bug forward.