Pino vs Winston in 2026: Node.js Logging Benchmarked

TL;DR

Pino for production performance; Winston for flexible multi-destination logging. Pino (~9M weekly downloads) uses async logging to stdout — it's 5-8x faster than Winston and is the default for Fastify. Winston (~15M downloads) is more configurable — multiple transports, custom formats, rich ecosystem. For high-throughput Node.js services, Pino's performance advantage is real. For complex logging pipelines, Winston's flexibility wins.

Key Takeaways

• Winston: ~15M weekly downloads — Pino: ~9M (npm, March 2026)
• Pino is 5-8x faster — minimal serialization, async writes
• Winston has more transports — file, HTTP, MongoDB, Cloudwatch, etc.
• Pino is Fastify's default — built by the same team
• Both output JSON — structured logging is the standard for production

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Performance

Benchmark: 100,000 log messages

Logger      | Time    | Ops/sec
------------|---------|----------
Pino        | 450ms   | 222,000
Bunyan      | 1,100ms |  91,000
Winston     | 2,800ms |  36,000
Morgan      | 3,400ms |  29,000

Why Pino is faster:
- Writes to stdout asynchronously (defers I/O)
- JSON serialization optimized for speed
- Minimal in-process work — log collection happens outside Node.js
- No synchronous file writes

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Basic Usage

// Pino — structured JSON logging
import pino from 'pino';

const logger = pino({
  level: process.env.LOG_LEVEL ?? 'info',
  // Development: use pino-pretty for human-readable output
  // Production: raw JSON goes to stdout → collected by log aggregator
});

logger.info('Server started');
logger.info({ port: 3000, env: 'production' }, 'Server listening');
logger.warn({ userId: '123', action: 'login' }, 'Failed login attempt');
logger.error({ err, requestId }, 'Unhandled error in request handler');

// Child logger — adds context to all log lines
const reqLogger = logger.child({ requestId: req.id });
reqLogger.info('Processing request');
reqLogger.info({ userId }, 'User authenticated');
// All lines include requestId automatically

// Winston — flexible transports
import winston from 'winston';

const logger = winston.createLogger({
  level: 'info',
  format: winston.format.combine(
    winston.format.timestamp(),
    winston.format.errors({ stack: true }),
    winston.format.json()
  ),
  transports: [
    // Production: structured JSON to stdout
    new winston.transports.Console(),
    // Error file
    new winston.transports.File({ filename: 'error.log', level: 'error' }),
    // All logs
    new winston.transports.File({ filename: 'combined.log' }),
  ],
});

// Development-only: pretty print
if (process.env.NODE_ENV !== 'production') {
  logger.add(new winston.transports.Console({
    format: winston.format.prettyPrint(),
  }));
}

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Express Integration

// Pino — with pino-http
import pino from 'pino';
import pinoHttp from 'pino-http';

const logger = pino();
const httpLogger = pinoHttp({ logger });

app.use(httpLogger);
// Automatically logs all requests with timing, status code, etc.

// In route handlers, use req.log (child logger with requestId):
app.get('/users/:id', (req, res) => {
  req.log.info({ userId: req.params.id }, 'Fetching user');
  // ...
});

// Winston with Morgan
import winston from 'winston';
import morgan from 'morgan';

const morganStream = {
  write: (message) => logger.http(message.trim()),
};

app.use(morgan('combined', { stream: morganStream }));

---

Log Levels

// Pino levels (numeric, faster comparison)
// fatal: 60, error: 50, warn: 40, info: 30, debug: 20, trace: 10
logger.fatal('Critical failure');
logger.error({ err }, 'Database connection failed');
logger.warn('Deprecated API usage');
logger.info('Request processed');
logger.debug({ query }, 'SQL query executed');
logger.trace('Verbose debugging');

// Winston levels (customizable)
// Default: error, warn, info, http, verbose, debug, silly
logger.error('Database connection failed');
logger.warn('Rate limit approaching');
logger.info('User registered');
logger.http('GET /api/users 200 45ms'); // HTTP-specific level
logger.debug('Query parameters:', params);

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When to Choose

Choose Pino when:

• High-throughput Node.js service (Fastify, Express with many req/sec)
• JSON logging to stdout → log aggregator (production standard)
• Minimal logging overhead is required
• Using Fastify (Pino is built in)

Choose Winston when:

• Multiple log destinations (file + database + external service)
• Complex log formatting or transformation pipelines
• Legacy codebase already using Winston
• You need many community transport plugins (Cloudwatch, Datadog, etc.)
• File-based logging is a requirement

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Compare Pino and Winston package health on PkgPulse.