Node.js: Debugging and Performance Tuning

Learn how to debug and optimize the performance of your Node.js applications.

Introduction

• The power of debugging and performance tuning
• What you should know
• Using challenges
• Configuring your development environment
• Demo application tour

1. Build a Troubleshooting Mindset

• Finding what went wrong
• Why measure performance?
• Documenting problems
• When is a problem resolved?

2. Introducing Microservices

• What's a microservice architecture?
• Microservice rock, paper, scissors
• Introducing PM2 for process management
• Managing microservices with PM2

3. Effective Logging Strategies

• Why and what should I log?
• Problems with Node.js console
• Implementing Express error pages
• Choosing a logging library
• Adding Winston for Node logging
• Request logging with Morgan
• Correlating requests in logs
• Cross-application request correlation
• Challenge: Cross-application request IDs
• Solution: Cross-application request IDs

4. Debugging Node.js Applications

• Debugging isn't just logging
• Introducing Node's built-in debugger
• Command-line debugging with Node inspect
• Debugging Node in Chrome DevTools
• Debugging Node with Visual Studio Code

5. Measuring Performance

• Benchmarking performance
• Benchmarking with ApacheBench
• Benchmarking code with Winston
• Profiling code execution

Conclusion

• Knowing what to optimize
• Caching fundamentals
• Next steps