Seven mapping engines. Real GIS workloads. Reproducible tests.

The Frontend GIS Benchmark measures Leaflet, MapLibre GL, OpenLayers, the ArcGIS Maps SDK, Google Maps, Apple MapKit, and Sundial head to head: real-world rendering performance: markers, GeoJSON, camera tours, and county-scale stress ladders built from 500,000 real South Dakota parcels, addresses, and roads, plus survey-grade geodesic accuracy, graded live against Karney's algorithms on the WGS84 ellipsoid.

The interactive board needs JavaScript and loads in a moment. The methodology explains every metric and the reference mathematics; the arena races the libraries side by side; the Sundial SDK page presents the house-built WebGL2 library that holds rank 1.