INP · high impact

Delay heavy third-party scripts

External scripts (like analytics, chat widgets, and ads) are slowing down the initial load of your page.

Why it matters

Third-party scripts often execute long tasks that block the main thread, destroying INP and TBT scores.

How to fix it in WordPress

  1. Identify the heaviest third-party scripts (e.g., chat widgets, trackers).
  2. Use your performance plugin to 'Delay JavaScript execution' until user interaction.
  3. Alternatively, host the scripts locally if your plugin supports it.

Plugin-specific steps

Already using one of these plugins? Follow the exact steps for your setup.

WP Rocket

  1. 1Go to Settings → WP Rocket → File Optimization.
  2. 2Check 'Delay JavaScript execution'.
  3. 3This solves almost all third-party script blocking issues automatically.

Perfmatters

  1. 1Go to Settings → Perfmatters → Assets.
  2. 2Enable 'Delay Javascript'.
  3. 3Choose 'Delay All' or add specific third-party URLs to the delay list.
  4. 4If using Google Analytics, enable 'Local Analytics' under the Analytics tab.

How to verify the fix

  • Check PageSpeed Insights. The third-party code warning should disappear.
  • Load the page, wait 3 seconds, then move your mouse. The chat widget or analytics should pop in only after you move.

Related INP fixes

Reduce unused JavaScript →Google Analytics / Tag Manager is blocking the page →Minimize main-thread work →

Find out which of these your site has.

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