Bits of .NET

⚡ 30% Faster API Calls

Each fetch opens new TCP connection. Handshake overhead. Connection: keep-alive reuses connections. Faster subsequent requests.

📝 Server Configuration

# Node.js (Express)
const server = app.listen(3000);
server.keepAliveTimeout = 60000;  // 60 seconds
server.headersTimeout = 61000;

# Nginx
keepalive_timeout 65s;
keepalive_requests 100;

# Apache
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 5

# IIS

  
    
      
    
  

🎯 Client Considerations

// Fetch automatically uses keep-alive if server supports it
fetch('/api/data');

// For XMLHttpRequest
const xhr = new XMLHttpRequest();
xhr.open('GET', '/api/data');
xhr.setRequestHeader('Connection', 'keep-alive');
xhr.send();

// Axios uses keep-alive by default
axios.get('/api/data');

// Browser limit: 6 connections per domain
// Use HTTP/2 instead (single connection)

💡 Benefits

• Reduces TCP handshake overhead (3-way handshake)
• Reduces TLS negotiation time (HTTPS)
• Improves latency for sequential requests
• Reduces server CPU usage (fewer connections)
• HTTP/2 makes this less critical (multiplexing)