On macOS 26 SwiftUI's Table retained AutoLayout and view-graph objects on
every data update, on top of an NSHostingView per cell: tens of MB an hour
while the window was visible. Measured side by side (6 min, window
visible, scrolling), heap growth fell from ~600 KB/min to ~35 KB/min and
the starting footprint from 67 MB to 49 MB.
Cells are reused AppKit views and an update rewrites only the changed
fields of rows on screen. Column widths and order are remembered; the
context menu, double-click, Delete key and sort directions match the old
table.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
