2.4.3

Changed

• A menu item renders once per shape, not once per row. Action::renderForDropdown() compiles its item into a
  Skeleton and splices the click expression, the same way Action::render() already did for the button. A table's
  row context menu rendered every item for every row — 30–45% of a whole table render, 91 of 283 ms for an
  eleven-item menu on 25 rows — and now costs no view render per row. The markup is unchanged apart from the
  view file's own surrounding whitespace, which a compiled skeleton trims.
• A request about one widget asks only that widget whether it is visible. A poll tick, a lazy load, a filter
  change and a widget's own action used to walk getVisibleWidgets() for the key, which asked every widget first —
  and isVisible() can cost as much as building the widget. Measured on a 12-widget dashboard, a tick went from
  10–18 queries and 40–60 ms to one query and under 10 ms. Same answer: found in the same layout, and it must
  still be visible.