Average Response Time by Framework
Response Time by Test Case
Comparative Analysis
Fastest Overall
Fastify
9.19ms average response time across 7 tests
Performance Gap
15.1% difference between fastest (Fastify) and slowest (Hapi)
Consistency
Fastify
Most consistent response times with smallest variance
Key Findings
Performance is Remarkably Similar
The benchmark results reveal that all four frameworks perform within a remarkably tight range for most operations. For simple GET requests and middleware processing, the differences are often less than 1ms - a variance that would be imperceptible in real-world applications where network latency typically dominates.
Express Shows Higher Variance in Write Operations
Express exhibits notably higher response times for PUT operations (single: 11ms avg, multiple: 25ms avg) compared to its competitors. Fastify demonstrates the most consistent performance across all operation types, making it a solid choice for applications with mixed read/write workloads.
Framework Selection: Beyond Raw Performance
Given the minimal performance differences, framework selection should be driven by other factors:
- Express: Largest ecosystem, most middleware options, gentle learning curve
- Fastify: Best for high-throughput APIs, excellent TypeScript support, schema-based validation
- Hapi: Enterprise-grade features, built-in authentication, configuration-centric design
- NestJS: Angular-like architecture, dependency injection, ideal for large teams
Methodology Note
These benchmarks measure response times under controlled conditions. Real-world performance depends heavily on database queries, external API calls, payload sizes, and infrastructure. The 10-run average metric provides more stable comparisons by reducing the impact of cold starts and system variance.
