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
Server and proxy
IP Address and Domain Name Geolocation Lookup Tool. IPv4, IPv6 and domain name Geolocation. Accurate IP and Domain name lookup database.
Converters
Pixel - Rem - Point units converter. Convert Pixel to REM or Point unit in seconds and vice versa with this free converrter.
Builders and generators
Generate beautiful color palette combinations for your designs. Get your combination scheme: analogous, triadic, complementary and so on.
Social Tester and validators
Get Facebook data and engagement count by URL. Retrieve Open Graph data, "share" count, comment count and engagement from url.
Images Social
Get YouTube video thumbnails and info dataset. Retrieve YouTube video image in 9 different sizes, quality, caption, description and more.
Tester and validators
Capture web page requests and timeline waterfall. Quickly capture and analyze web page network requests during page load.
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
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