Speed performance
When we talk about "Long Task" we are referring to actions carried out by JavaScript code: these monopolize the main thread for long periods of time and cause the user interface to slow down considerably.
This means that the page does not react to user input while loading, even though it appears to be fully loaded.
The RAIL model tells us that you must ensure that you process user input within 50ms: this way you should be sure that the visible response occurs within 100ms.
SeoChecker will display you in a table like the one below all the long tasks: URL, Start Time and Duration.
Firstly, you could split up large scripts and monitor the third-party scripts.
Keep your pages responsive and reduce your work into small parts (not more than 50ms of work), running them in the right place (like off the main thread) and time.
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 icons for web, Android, iOs, Microsoft and Apps. Show a graphical representation of your site within browser’s address bar.
Converters
Convert instantly color codes from RGB (red, green, blue) to HEX triplets color schema and vice versa. Insert color and try it for free.
Create your personalized Barcode in over 70 formats. Choose your data, formats and colors and get your personalized Barcode.
Server and proxy
Retrieve remote Server Status Code and Headers. Get HTTP Status code, Headers info, Cache-control and data from a given URL.
Analytics Google Tracking script
Generate URLs for Google Play Campaign Measurement. Add Google Analytics Campaigns parameters to Google Play Urls - Android SDK.
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
Google Server and proxy
Find out the exact date and time your web page was cached by Google’s crawler through Google Cache Status checker
Build your Service Workers and enrich user experience. Transform your website in a huge Progressive Web App and enrich users experience.