Web API Performance Comparison

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This repository contains performance-focused web API implementations across 25 languages and 95+ frameworks/runtimes:

• JavaScript / Node.js: Express, Express Cluster, Fastify, Fastify Cluster, Koa, Koa Cluster, Hono, Hono Cluster, NestJS Express, NestJS Express Cluster, NestJS Fastify, NestJS Fastify Cluster, uWebSockets, uWebSockets Cluster, AdonisJS, AdonisJS Cluster, Nitro, Nitro Cluster
• JavaScript / Bun: Bun, Bun Cluster, Express, Express Cluster, Fastify, Fastify Cluster, Hono, Hono Cluster, Koa, Koa Cluster, NestJS Express, NestJS Express Cluster, NestJS Fastify, NestJS Fastify Cluster, Elysia, Elysia Cluster, AdonisJS, AdonisJS Cluster, Nitro, Nitro Cluster
• JavaScript / Deno: Deno, Deno Parallel
• Python: FastAPI, Litestar, Django, Flask, BlackSheep
• Rust: Actix, Axum
• Go: Fiber, Gin, Chi, net/http, Echo
• Elixir: Phoenix, Plug
• Erlang: Cowboy
• C#: .NET API, .NET AOT, Carter, Carter AOT, Carter AOT + Dapper, Carter AOT + EF Core, Carter + Dapper, Carter + EF Core, Dapper, EF Core, EF Core AOT
• F#: F# API, F# AOT, F# Dapper, F# EF Core, F# AOT + Dapper
• Java: Spring Boot, Spring WebFlux, Quarkus, Micronaut
• Kotlin: Ktor
• Haskell: Servant
• C++: Drogon
• C: Microhttpd, libuv
• Swift: Vapor
• Ruby: Rails, Sinatra, Falcon
• PHP: Laravel, Swoole
• Crystal: Kemal, Lucky
• Gleam: Wisp
• Zig: zap
• Ada: GNAT
• COBOL: GnuCOBOL
• Pascal: fpWeb
• Fortran: GFortran
• Lua: OpenResty
• Dart: Shelf

The APIs expose two endpoints: a simple "Hello World" (GET /) and a more complex "Orders" endpoint (GET /orders).

Benchmark Results

Test Configuration: wrk -t 2 -c 120 -d 20s — 2 threads, 120 connections, 20 seconds
Generated: 2026-03-08 22:53:29 UTC

Hello World (GET /)

| Framework | Port | Req/sec | Avg Latency | Max Latency | Total Requests | Transfer/sec | Memory | | ------------------------------ | ---- | ---------- | ----------- | ----------- | -------------- | ------------ | -------- | | Rust Actix | 8005 | 204,901.52 | 563.69us | 51.45ms | 4,098,380 | 26.38MB | 5.477MiB | | Haskell Servant | 8006 | 185,813.73 | 703.71us | 84.63ms | 3,716,357 | 33.85MB | 297.1MiB | | JS Deno Parallel | 8048 | 167,880.22 | 841.65us | 62.51ms | 3,358,386 | 25.30MB | 72.3MiB | | Rust Axum | 8022 | 160,085.78 | 714.95us | 47.65ms | 3,202,007 | 20.61MB | 3.754MiB | | JS Node Fastify Cluster | 8042 | 154,504.70 | 1.60ms | 197.81ms