- Add Section 19 benchmarks covering camera pan viewport uniform updates,
spatial hover candidate search, and viewport data assembly scaling
- Add navigation telemetry probes in src/perf.rs (active only when
PERF=1) to track frame interval, batched input moves, and layout-draw gap
Avoid full document, cache, and GPU rebuilds for entity deltas so add, delete, history, selection, and live polyline edits stay responsive on large drawings.
Karim Jerbi