Your page contains JavaScript tasks that run for a long time on the main thread, making the page unresponsive to user input. This directly impacts Interaction to Next Paint (INP) scores.
A single JavaScript function that takes hundreds of milliseconds to execute.
Break down long tasks into smaller, asynchronous chunks using `setTimeout`, `requestIdleCallback`, or Web Workers. This allows the browser to process other tasks and respond to user input.
By yielding to the main thread, you ensure the page remains responsive, improving INP and overall user experience.
This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.
Black SEO Analyzer automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.
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