Vitest Performance

What it does

This skill allows AI agents to analyze and optimize the performance of Vitest test suites. It identifies bottlenecks in tests, provides insights into execution times for individual tests, and suggests strategies for improving overall test suite speed. The skill aims to reduce testing time and improve developer productivity by pinpointing areas where tests can be made more efficient.

When to use it

• Slow Test Suites: When your Vitest test suites are taking an excessively long time to run, hindering development cycles.
• Performance Regression Detection: To identify performance degradations in existing test suites after code changes or dependency updates.
• Test Optimization Efforts: As part of a broader initiative to improve the efficiency and reliability of your testing process.
• Debugging Slow Tests: When you suspect that specific tests are unusually slow and need detailed analysis.

Key capabilities

• Performance profiling of Vitest test suites.
• Identification of slowest tests within a suite.
• Insights into execution time breakdowns for individual tests.
• Recommendations for optimizing test performance.

Example prompts

• "Analyze the performance of my Vitest test suite and identify any bottlenecks."
• "Show me the slowest tests in my project's 'components/button.test.ts' file."
• "Give me suggestions on how to improve the speed of my Vitest tests."

Tips & gotchas

This skill requires a Vitest testing environment to be set up and running within your project. It is most effective when used proactively, rather than reactively addressing performance issues after they become critical.