Sizes reuse a cache until content or layout changes. Performance sampling runs only while a Time, Counts or FPS view is visible.
MB = UTF-8 HTML bytes / 1,000,000, including retained hidden content. Dialogs, diagnostics, live status metadata, progress, breadcrumbs, scripts and styles are excluded. External assets, browser RAM and network transfers are not counted.
Element counts include each cell wrapper and its retained DOM descendants after exclusions. Row and column totals each count a cell once. Earlier snapshots may not contain element counts.
