Node vs Bun Cold Start Benchmark

mcp_bench.sh

#!/bin/bash

cat << 'EOF' > server.cjs
const http = require('http');
const server = http.createServer((req, res) => res.end('ok'));
server.listen(3000, () => process.exit(0));
EOF

cat << 'EOF' > bun_server.js
const server = Bun.serve({
  port: 3000,
  fetch(req) { return new Response("ok"); }
});
process.exit(0);
EOF

echo "--- Node.js Cold Start ---"
time node server.cjs

echo "--- Bun Cold Start ---"
time bun bun_server.js