Explore tools and techniques for observing and understanding the inner workings of Node.js processes in this conference talk from CascadiaJS 2018. Dive into four critical concepts including the microtask queue, event loop, and JavaScript execution. Learn about event loop delay, the bootstrap process, and main event loop. Discover the first rule of Node.js performance and gain insights into async hooks, bubble profiling, and bootstrap trace events. Examine tricky questions about Promises and their execution, enhancing your understanding of Node.js internals and improving your ability to optimize application performance.