latency-optimization

What I do

• Identify and eliminate latency bottlenecks
• Optimize TCP/UDP connections
• Implement connection pooling
• Use CDNs and edge computing
• Optimize TLS handshakes
• Reduce DNS lookup times
• Implement HTTP/2 and HTTP/3
• Design for geographic distribution

When to use me

Use me when:

• Applications require low latency
• Global user base with performance issues
• Real-time features (gaming, trading, chat)
• Page load times exceed targets
• Optimizing API response times
• Reducing time to first byte (TTFB)

Key Concepts

Latency Sources

Source	Typical Time	Optimization
DNS	20-200ms	Caching, prefetch
TCP Connect	30-100ms	Keep-alive, HTTP/2
TLS	50-200ms	TLS 1.3, session tickets
TTFB	50-500ms	Caching, CDN
Transfer	Varies	Compression, HTTP/2

Connection Optimization

// Connection pooling (Node.js)
const pool = new Pool({
  max: 20,
  idleTimeoutMillis: 30000,
  connectionTimeoutMillis: 2000
});

// HTTP/2 multiplexing
const http2 = require('http2');
const client = http2.connect('https://api.example.com');

const req = client.request({ ':path': '/data' });
req.on('response', handleResponse);

// Prefetch DNS
<link rel="dns-prefetch" href="//api.example.com">

CDN Strategies

• Static asset caching at edge
• Geographic routing to nearest POP
• Image optimization and format conversion
• API request acceleration
• Origin shielding

Real-time Optimizations

• WebSocket over polling
• Server-Sent Events for one-way
• QUIC/HTTP/3 for reduced latency
• Binary protocols (gRPC, MessagePack)
• Edge computing for computation