Test Performance

• All tests are executed on MacBook Air M1 with 16G RAM 256 GB.
• Benchmarking tool:
  • Wrk
• The software version:
  • Nest v10.0.0
  • Node v20.1.0
  • Bun v1.0.3

We will test 12 threads with 100 connections in 30s and 3 rounds

Node v20 Express ~ 18k req/30s

Node v20 Fastify ~ 71k req/30s

Bun v1 Express ~ 38k req/30s (211% with Node Express)

Bun v1 Fastify ~ 58k req/30s (80% with Node Fastify)

• The benchmark result tell us:
  • Fastify is 4x faster than Express when using NodeJS 😍!
  • Fastify is 1.5x faster than Express when using Bun 🙌
  • Bun Fastify is slower than NodeJS Fastify??? 😮
  • Bun Express is 2x faster than NodeJS Express 😂

Test Build Package Dependencies

• All tests are executed on MacBook Air M1 with 16G RAM 256 GB.
• Now we try to install with >= 1000 packages dependencies so that we can checkout Bun or Pnpm faster
  • Bun v1.0.3
  • Pnpm v8.2.0

Without lockfile

Pnpm -> Done 24.1s

With lockfile

Pnpm without lockfile -> 5.9s

Feeling

• With the benchmark result above. I surprise when Express (Bun) is increase performance but Fastify (Bun) is decrease performance
• But this is only testing healthcheck so it not represent Bun can be improve NestJS faster than NodeJS
• If your project is dependencies a lot of library or third-party so using Bun with Fastify is the good option to choose

Want to try in your computer

• Install a HTTP benchmarking tool

brew install wrk

• To start with NodeJS

# install package dependencies
pnpm install
# start server
## Express
pnpm run start:dev
## Fastify
pnpm run start:dev -- --platform=fastify

• To start with Bun

# install package dependencies
bun install
# start server
## Express
bun run src/main.ts
## Fastify
bun run src/main.ts --platform=fastify