5x SSR Throughput: Profiling SSR Hot Paths in TanStack Start | TanStack Blogby Manuel Schiller and Florian Pellet on Mar 17, 2026. TL;DR We improved TanStack Start's SSR performance dramatically. Under sustained load (using our links-100 stress benchmark with 100 concurrent connections, 30 seconds): Throughput: 427 req/s → 2357 req/s (5.5x) Average latency: 424ms → 43ms (9.9x faster) p99 latency: 6558ms → 928ms (7.1x faster) Success rate: 99.96% → 100% (the server stopped
Profiling - Rspack
