Performance
One Dataset of 50,000 seeded entries, wide enough that no browser paints it whole. The statusbar
below states what building and first-painting it actually cost, and how few
.fg-row/.fg-bar nodes the DOM holds at any one time. The shorter chart
underneath shares this chart's time axis and horizontal scroll position.
Harness bench
Demo-only controls. None of this is library UI.
Dataset size
Reloads the page with a different entry count (?count=). Build and first-paint
time grow with the count; the rendered row/bar count should barely move.