Ubuntu服务器下网站在线人数模拟Bot内存优化方案咨询

Great question—spinning up full Chromium pages for each bot is total overkill when all you need is to maintain WebSocket or long-poll connections. That's exactly why you're seeing such heavy memory usage (60-120MB per page). Let's walk through far more efficient solutions, ordered by how much they'll reduce your resource footprint:

1. Direct WebSocket/Long-Poll Clients (Best for Memory) #

Skip the browser entirely. Most sites using WebSocket or long-poll don't need a full browser environment—they just need valid connections that follow their protocol rules. This approach cuts memory usage to a few MB per bot (sometimes less).

How to Implement: #

1. Inspect the target site's protocol: Use your browser's DevTools (Network tab, filter by "WS" or "Fetch/XHR") to find:

   • The WebSocket endpoint URL (looks like wss://example.com/ws)
   • Required request headers (User-Agent, Cookies, Origin, etc.)
   • Any initial messages (like joining a room or sending an auth token)
   • Heartbeat mechanisms (many sites send periodic "ping" messages to keep connections alive)

2. Use a lightweight WebSocket library: The ws package is perfect for this. Here's a sample implementation:

const WebSocket = require('ws');

async function runWebSocketBots(botsCount = 10, runTimeSeconds = 60) {
  const bots = [];
  const wsEndpoint = 'wss://www.example.page/your-ws-endpoint'; // Replace with actual URL
  const connectionHeaders = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/114.0.0.0 Safari/537.36',
    'Cookie': 'session-id=your-session-cookie' // Add if site requires auth
  };

  console.log(`Launching ${botsCount} WebSocket bots...`);

  for (let i = 1; i <= botsCount; i++) {
    const bot = new WebSocket(wsEndpoint, { headers: connectionHeaders });

    bot.on('open', () => {
      console.log(`Bot ${i} connected`);
      // Send any required initial message (e.g., join a chat room)
      // bot.send(JSON.stringify({ action: 'joinRoom', room: 'main' }));
    });

    bot.on('message', (data) => {
      const message = JSON.parse(data.toString());
      // Handle heartbeats if the site uses them
      if (message.type === 'ping') {
        bot.send(JSON.stringify({ type: 'pong' }));
      }
    });

    bot.on('error', (err) => console.error(`Bot ${i} error:`, err));
    bots.push(bot);
  }

  // Cleanup after run time
  setTimeout(() => {
    console.log('\nShutting down all bots...');
    bots.forEach(bot => bot.close());
    console.log('Finished');
  }, runTimeSeconds * 1000);
}

runWebSocketBots();

For long-poll sites, use the native http/https modules to repeatedly send requests and keep the connection open—same idea, just no WebSocket handshake.

2. Optimize Your Existing Puppeteer Setup #

If you need to stick with Puppeteer (e.g., the site has complex JS that can't be replicated easily), you can slash memory usage by disabling unnecessary browser features:

Optimized Puppeteer Code: #

const puppeteer = require('puppeteer');

async function runOptimizedPuppeteerBots(botsCount = 10, runTimeSeconds = 60) {
  let timeLeft = runTimeSeconds * 1000;
  console.log('Starting optimized Chromium instance...');

  const browser = await puppeteer.launch({
    args: [
      '--disable-gpu',
      '--no-sandbox',
      '--headless=new', // Newer, more efficient headless mode
      '--disable-dev-shm-usage',
      '--disable-images', // Cut out image loading entirely
      '--disable-features=VizDisplayCompositor', // Disable unnecessary rendering
      '--disable-web-security',
      '--single-process' // Experimental: runs everything in one process (reduces overhead)
    ]
  });

  for (let i = 1; i <= botsCount; i++) {
    const page = await browser.newPage();
    
    // Block all non-essential requests
    await page.setRequestInterception(true);
    page.on('request', req => {
      const allowedTypes = ['document', 'websocket'];
      if (allowedTypes.includes(req.resourceType())) {
        req.continue();
      } else {
        req.abort();
      }
    });

    await page.setViewport({ width: 800, height: 600 }); // Smaller viewport = less memory
    await page.goto('https://www.example.page/');
    console.log(`Page ${i} created`);
  }

  // Countdown timer
  const interval = setInterval(() => {
    process.stdout.write(`\rTime Left: ${timeLeft / 1000}s`);
    timeLeft -= 1000;
    if (timeLeft <= 0) {
      clearInterval(interval);
      browser.close();
      console.log('\nFinished');
    }
  }, 1000);
}

runOptimizedPuppeteerBots();

This should reduce memory per page by 30-60% compared to your original setup.

3. Switch to Playwright (Better Memory Management) #

Playwright (from Microsoft) is a modern alternative to Puppeteer with better memory efficiency, especially for multi-page scenarios. The API is almost identical to Puppeteer, so switching is straightforward.

Sample Playwright Code: #

const { chromium } = require('playwright');

async function runPlaywrightBots(botsCount = 10, runTimeSeconds = 60) {
  let timeLeft = runTimeSeconds * 1000;
  console.log('Starting Playwright instance...');

  const browser = await chromium.launch({
    headless: true,
    args: [
      '--no-sandbox',
      '--disable-dev-shm-usage',
      '--disable-images'
    ]
  });

  for (let i = 1; i <= botsCount; i++) {
    const page = await browser.newPage();
    await page.route('**/*', route => {
      const type = route.request().resourceType();
      if (type === 'document' || type === 'websocket') {
        route.continue();
      } else {
        route.abort();
      }
    });
    await page.goto('https://www.example.page/');
    console.log(`Bot ${i} ready`);
  }

  const interval = setInterval(() => {
    process.stdout.write(`\rTime Left: ${timeLeft / 1000}s`);
    timeLeft -= 1000;
    if (timeLeft <= 0) {
      clearInterval(interval);
      browser.close();
      console.log('\nFinished');
    }
  }, 1000);
}

runPlaywrightBots();

Playwright typically uses 20-30% less memory than Puppeteer for the same number of pages.

Final Recommendations #

• Use direct WebSocket clients if you can reverse-engineer the site's protocol—this is the most cost-effective option by far.
• Optimize Puppeteer if you need browser-level JS execution but want to cut costs.
• Switch to Playwright if you're starting fresh or already use Microsoft's tooling.

内容的提问来源于stack exchange，提问作者ArtemSky