Zap vs. Logrus: Go Logging Libraries Compared

Zap and Logrus are popular Go language logging libraries, sharing common features like log levels, formatted output, and context information. However, they have key differences. Here's a comparison:

1. Performance: Zap is faster than Logrus. Zap's performance is more than double that of Logrus, primarily due to its optimized serialization and logging output methods.

2. Logging Levels: Both Zap and Logrus support multiple log levels, but Zap offers a wider range of options, including debug level, production level, and others.

3. Context Information: Both libraries enable adding context information to logs. However, Zap provides more robust context options, including adding stack information, calling files, and line numbers.

4. Configuration: Logrus has a simpler configuration, offering basic options like log level and output format. Zap's configuration is more complex, providing options for asynchronous logging, log rolling, and more.

In summary, if performance is a priority, choose Zap. If you prefer a simpler logging library configuration, Logrus might be a better fit.