Express vs Fastify vs NestJS — Real Performance Benchmarks (and When NOT to Migrate)

Описание: Most developers think switching from Express to Fastify or NestJS will instantly speed up their backend — but the real-world numbers tell a different story.

In this breakdown, we’ll compare real performance benchmarks across Express, Fastify, and NestJS, and explain when migrating isn’t worth it.

📊 Benchmarks Covered:
• Express → ~20 K req/sec
• Fastify → up to 100 K req/sec
• NestJS (Express) → 18 K req/sec
• NestJS (Fastify) → 90 K req/sec

💡 Key Takeaways:

Fastify wins in raw throughput 🚀

NestJS gains structure, not raw speed 🧠

DB latency matters more than framework choice

Don’t migrate unless you’re hitting real bottlenecks

#NodeJS #Express #Fastify #NestJS #Backend #Performance #WebDev #JavaScript #APIs #Scaling #DevDose