Web Worker
A Web Worker is a script that runs in the background in a browser, on a separate thread from the main UI thread. This allows you to perform computationally intensive tasks without freezing or blocking the user interface. Offloading heavy JavaScript processing to a worker is a key strategy for improving responsiveness and achieving a good INP score. The Service Worker is a special type of worker with additional capabilities, like intercepting network requests.
Related web performance terms
- WKWebView
A WKWebView is the modern browser component that native iOS applications use to display web content directly inside the app. Think of it as a mini-browser window embedded within an app's interface.
- WKWebViewConfiguration
This is the "settings panel" for a WKWebView. It is a configuration object that an iOS app developer uses to set up the properties and behavior of the in-app browser view.
- Waterfall Chart
A waterfall chart is a type of data visualization used in web performance analysis tools to illustrate how a browser loads all the assets on a webpage.
- Web Fonts
Web fonts are fonts that are downloaded by the browser on demand to render text in a specific typeface that is not pre-installed on the user's device.