Module bench 

A synthetic ~n-node surface for the timing measurement (the VAPP-4 bench tree in the core vocabulary): cards in a grid with headings, text, pills and buttons, so a pass exercises flex, grid, wrapping and controls.

Functions

bench_list_tree

A surface around a WINDOWED list of rows rows (each a pressable row with an avatar-sized icon, a title, a muted line and a trailing badge, a :hover block): the scroll + hover-churn bench.

bench_tree

A nested-form surface with about n layout nodes (never fewer).

bench_tree_json

The same as JSON text (for the FFI).