[System Design] GraphHopper Distance Matrix: Self-Host OSRM vs Haversine for Route Optimization (opens in new tab)

Series context: This is Part 7 of the series. The distance matrix built here feeds directly into the OR-Tools VRP solver in . The Invisible yet Most Expensive Bottleneck in E-commerce Routing Answer-first: For 1 warehouse + 100 delivery stops, you need 10,201 pairwise distances. Self-hosting GraphHopper or OSRM on a $20/month VPS delivers this in under 50ms per batch — completely free. Using Google Maps Distance Matrix API for the same workload costs $510/day. This guide shows you exactly whe...