What logging library do you use?

In Go, the following libraries are often used for logging:

• log — the standard library, suitable for simple tasks.
• logrus — structured logging with support for log levels, hooks, and formatting.
• zap from Uber — a high-performance library with minimal allocation.
• zerolog — a very fast and compact JSON logger.

The choice depends on the project requirements. For example, for high-performance services, zap is often chosen:

import (
    "go.uber.org/zap"
)

func main() {
    logger, _ := zap.NewProduction()
    defer logger.Sync()

    logger.Info("Starting application", zap.String("version", "1.0.0"))
}

If simplicity and extensibility are needed — logrus:

import (
    log "github.com/sirupsen/logrus"
)

func main() {
    log.SetFormatter(&log.JSONFormatter{})
    log.Info("Application started")
}

The library choice should consider performance requirements, formatting, and integration with monitoring systems.