Routing Engine

OSRM vs GraphHopper: Routing Engine Architecture Compared Answer-first: Comparing OSRM and GraphHopper shows OSRM excelling in raw speed (<2ms single queries, <20ms 100x100 matrix) via C++ Contraction Hierarchies and Linux POSIX shared memory (mmap), while GraphHopper provides flexible Java-based runtime Custom Models, turn restrictions, and multi-profile vehicle fleets. For static ride-hailing matrices, choose OSRM; for heterogeneous delivery fleets with weight/height limits, choose GraphHopper. Prerequisite: Solid understanding of graph algorithms (Dijkstra, A*), Linux virtual memory management (mmap, POSIX shared memory), OpenStreetMap (OSM) protocol buffers (.pbf), and Go 1.25 concurrent network programming. ...

GraphHopper Distance Matrix: API & OSM Hosting Guide Answer-first: GraphHopper distance matrix is a high-performance open-source routing engine endpoint that calculates travel times and road distances for N×M origin-destination coordinate pairs using OpenStreetMap data. By utilizing Contraction Hierarchies and memory-mapped graphs, self-hosted GraphHopper evaluates a 100×100 matrix in under 52ms, providing 99.7% cost savings over commercial APIs with runtime vehicle customization. Prerequisite: Familiarity with Docker containerization, REST API design, and OpenStreetMap (OSM) routing primitives. ...