- render: damage()/damage_with() — changed items and only the frames whose composition changed
(cache keeps the composition each edit replaced; Cache::composed_for matches a document
version exactly); conservative full repaint for styles, swatches, layers, parents, wrap,
effects and cross-story text (+ tests incl. pixel-identical patch vs full render)
- UI: canvas patches its texture after edits with the view unchanged (0.6 ms vs 22 ms on the
sample when typing); perf harness row for the damage repaint
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
