Bijan From node point of view I think you have under evaluated its performance. There are couple of things one must take care of while running node in production —

1. Run it in cluster mode. Node by default is single threaded and would be unable able to scale if it runs on just one CPU.
2. Use `const` instead of `var` this helps the v8 engine do further optimizations.
3. Use `response.end()` instead of `response.send()` this will significantly improve expressJS performance.
4. Use node.js version 6.0 as it now supports tail recursion. This will reduce memory footprint.

const cluster = require(‘cluster’)
const numCPUs = require(‘os’).cpus().length
const express = require(‘express’)
const app = express()

const fib = function (n) {
 if (n === 0) {
 return 0
 } else if (n === 1) {
 return 1
 }
 return fib(n — 1) + fib(n — 2)
}

app.get(‘/:number’, function (req, res) {
 const number = parseInt(req.params[‘number’], 10)
 const result = fib(number)
 res.end(‘Node + Express<hr> fib(‘ + number + ‘): ‘ + result)
})

if (cluster.isMaster) {
 for (var i = 0; i < numCPUs; i++) {
 cluster.fork()
 }

cluster.on(‘exit’, (worker, code, signal) => {
 console.log(`worker ${worker.process.pid} died`)
 })
} else {
 app.listen(3000)
}

My macbook has exactly the same configuration as yours but I was able to extract Requests/sec: 50804.34 compared to yours 8962 Requests/sec. Which essentially makes it the top contender. Let me know the results you get when you run in your env.

Thanks!