英语口语评测双十二促销活动

const express = require('express');
const cluster = require('cluster');
const http = require('http');
const numCPUs = require('os').cpus().length;
const NodeCache = require('node-cache');

if (cluster.isMaster) {
  console.log(`Master ${process.pid} is running`);

  // Fork workers.
  for (let i = 0; i < numCPUs; i++) {
    cluster.fork();
  }

  cluster.on('exit', (worker, code, signal) => {
    console.log(`worker ${worker.process.pid} died`);
  });
} else {
  const app = express();
  const cache = new NodeCache({ stdTTL: 60 }); // Cache data for 60 seconds

  app.get('/evaluate', (req, res) => {
    const key = req.query.text;
    const cachedResult = cache.get(key);

    if (cachedResult) {
      return res.json(cachedResult);
    }

    // Simulate a time-consuming evaluation process
    const result = evaluateSpeech(key);
    cache.set(key, result);
    res.json(result);
  });

  function evaluateSpeech(text) {
    // Placeholder for actual evaluation logic
    return { score: Math.random() * 100 };
  }

  app.listen(3000, () => {
    console.log(`Worker ${process.pid} started`);
  });
}