A review measured 1 GB of GPU stages for a Before/After at 1:1 on a 2800 px
canvas against a 400 MB budget, with nothing bounding it. The open photo's window
and before caches are now cut (the before side first) past four times the budget,
the whole-frame view's never; idle caches still go at the budget. The one shared
device copy of a big original is reported (sharedSourceBytes in the renderer's
memory report) and a misleading comment about it is corrected.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>