How can I use performance profiling in DevTools?

How can I use performance profiling in DevTools?

You can use the Performance panel in DevTools to analyze the runtime performance of your web application. Start by opening DevTools, navigating to the Performance tab, and clicking the 'Record' button to capture a performance profile.

What specific metrics should I look for during profiling?

Look for metrics like CPU usage, memory consumption, and the time taken for various tasks. Pay attention to the 'Main' thread activity and any long tasks that may be blocking the UI.

Can I see a breakdown of individual function calls?

Yes, after recording, you can view a flame graph that shows the call stack and the time spent in each function. This helps identify performance bottlenecks.

Are there any tools to automate performance profiling?

Yes, tools like Lighthouse and WebPageTest can automate performance profiling and provide detailed reports on various performance metrics.