Speed performance
SeoChecker indicates in a table like the one below preload candidates based on the third level of requests in the critical request chain.
Imagine this is a critical request chain of a page:
index.html |--app.js |--styles.css |--ui.js
SeoChecker would choose ui.js and styles.css as candidates.
Indeed, <script src=”app.js”> is declared by the index.html file: once app.js runs, fetch() is called to download ui.js and styles.css.
As long as they are downloaded, parsed and executed, the page does not show up.
If you declare preload links, you can make the pages load faster: the potential savings depend on when the browser is able to initiate the requests.
Learn more about Speed performance
On page SEO performance and page checkup.
Over 300 parameters for the deeper page analysis.
Share this Guide
Did you like it? Share it!
Web tools for modern developers. Try these one!
Over 50 generators, builders and validators to improve your SEO and web performances
Builders and generators
Generate your Web App Manifest json and improve site data. Provide information about your website, allow users to quick access for a better experience.
Generate icons for web, Android, iOs, Microsoft and Apps. Show a graphical representation of your site within browser’s address bar.
Layout Grid Calculator: set your grid system, page width, margin, gutter and columns. Design your layout grid system for web pages and print design.
Builders and generators Google
Choose a map theme or build your custom Google map. Customize maps with your own creativity, settings, styles and colors.
Google
Find out how Google calculates your overall Performance score. Drag the cursors to understand what thresholds you must be aiming for achieving a good performance
Check SEO performance and page checkup. Over 250 parameters for the deeper page analysis. Find out more about the performance of your website.
Social Tracking script
Measure and track user interactions with your contents. Track all the events you want: downloads, clicks, video plays, checkout flow, engagement.
Images
Quicly capture any web page screenshot and thumbnails. Get image rendering on desktop and mobile and thumbnails filmstrip with loading timing.