Node.js performance hooks and measurement APIs

The article explores the use of Node.js performance hooks and measurement APIs to optimize application performance by identifying bottlenecks and improving execution speed. It highlights the limitations of using traditional methods like the Date object for performance measurement and introduces the Node.js Performance API, which offers more granular insights into code execution times. The article explains how to use performance.mark and performance.measure methods to pinpoint and measure specific events within an application, and suggests exporting this data to tools like Prometheus for further analysis. Additionally, it discusses strategies for optimizing Node.js applications, such as using indexing and caching for databases, reducing dependencies, and offloading tasks to background workers for CPU-intensive processes. The piece emphasizes the importance of measuring application performance before and after optimizations to ensure the changes are effective and highlights the role of Node.js's Performance API in facilitating these improvements.