# Testing Cookbooks

[Introduction to performance testing](https://www.youtube-nocookie.com/embed/v7Dy7zMZp9Q?rel=0&showinfo=0&modestbranding=1&autoplay=0)

Performance testing is key to developing reliable software. It ensures your application can handle user traffic and workload, proactively identifying issues before they become problems.

Blackfire provides a comprehensive testing suite that lets you:

- Define expectations for HTTP requests and CLI
- Automatically evaluate assertions with every profile made
- Secure the critical user journey with synthetic monitoring
- Integrate the tests with your CI/CD pipeline

You can spot bottlenecks and understand the impact of changes before they go live.

## Read More on Performance Testing

- [Writing Tests ](tests)

      [Requires Production](https://www.blackfire.io/pricing)
- [Assertions](assertions)
- [Metrics](metrics)
- [Recommendations](recommendations)