Being able to measure performance and identify bottlenecks is essential for web developers of modern web applications. Delivering a smooth user experience can be a challenge as complex scripts, dependencies on third-party JavaScript frameworks, and high performance animations become the norm. Most of today’s devices have displays which refresh at 60 Hz, which means our apps need to update at a con
![Introducing the Rendering Frames Timeline | WebKit](https://cdn-ak-scissors.b.st-hatena.com/image/square/c2b58316fe5a3e2aa22d2ba2e1dba599392003b1/height=288;version=1;width=512/https%3A%2F%2Fwebkit.org%2Fblog-files%2Frendering-frames-timeline%2Finspector-rendering-frames.png)