钉钉 AI 客服：性能调优实战（续）

钉钉 AI 客服：性能调优实战（续）

继续分享性能调优技巧。

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一、Node.js 性能优化

1.1 事件循环

// 避免阻塞事件循环
const heavyTask = (data) => {
  return new Promise((resolve) => {
    setImmediate(() => {
      // 执行耗时任务
      resolve(result);
    });
  });
};

1.2 内存管理

// 监控内存
setInterval(() => {
  const used = process.memoryUsage();
  console.log({
    rss: `${used.rss / 1024 / 1024} MB`,
    heap: `${used.heapUsed / 1024 / 1024} MB`
  });
}, 60000);

---

二、异步优化

2.1 并发控制

const pLimit = require('p-limit');

const limit = pLimit(10);  // 最多 10 个并发

const results = await Promise.all(
  tasks.map(task => limit(() => process(task)))
);

2.2 批量处理

// 批量写入数据库
async function batchInsert(items) {
  const batchSize = 100;
  for (let i = 0; i < items.length; i += batchSize) {
    const batch = items.slice(i, i + batchSize);
    await db.insertBatch(batch);
  }
}

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三、网络优化

3.1 HTTP/2

const http2 = require('http2');

const server = http2.createSecureServer({
  key: fs.readFileSync('key.pem'),
  cert: fs.readFileSync('cert.pem')
}, app);

server.listen(443);

3.2 连接池

const http = require('http');

const agent = new http.Agent({
  keepAlive: true,
  maxSockets: 50
});

const response = await fetch(url, { agent });

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四、CPU 优化

4.1 Worker Threads

const { Worker } = require('worker_threads');

function runWorker(data) {
  return new Promise((resolve, reject) => {
    const worker = new Worker('./heavy-task.js', { workerData: data });
    worker.on('message', resolve);
    worker.on('error', reject);
  });
}

4.2 Cluster 模式

const cluster = require('cluster');

if (cluster.isMaster) {
  const cpuCount = require('os').cpus().length;
  for (let i = 0; i < cpuCount; i++) {
    cluster.fork();
  }
} else {
  app.listen(3000);
}

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五、监控工具

5.1 性能分析

# Node.js 性能分析
node --prof app.js
node --prof-process isolate-*.log

5.2 APM 工具

• New Relic
• Datadog
• Elastic APM

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六、优化效果

指标	优化前	优化后
响应时间	2s	0.5s
并发能力	100	500
内存占用	512MB	256MB

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项目地址：GitHub - dingtalk-connector-pro 有问题欢迎 Issue 或评论区交流