Reduce JavaScript Main Thread Blocking

How to optimize clover.security

WordPress SiteScore: 51/100Analyzed March 2026Re-analyze this site

Reduce JavaScript Main Thread Blocking

High Impact+20 points estimated

Why It Matters

4.5 seconds of main thread work with 560ms TBT prevents user interactions and delays page responsiveness.

How to Fix

Defer HubSpot forms JavaScript (518KB unused) until user interaction using WP Rocket's JavaScript optimization. Remove legacy polyfills from third-party scripts (48KB savings). Minify your custom script.js file to save 5KB.

0Needs Improvement

What This Score Means

A score of 51 falls in the "Needs Improvement" range (50-89). While it is better than poor (0-49), you should aim for 90+ to provide an optimal user experience and maximize SEO benefits.

This site is slower than approximately 35% of similar sites. The main issues affecting performance are image optimization, JavaScript execution time, and layout stability.

Addressing these issues could improve your conversion rate by 15-20% and boost your search engine rankings.

Core Web Vitals Analysis

LCP

Largest Contentful Paint

6.6s
Poor

Good: < 2.5s

Measures how long it takes for the main content to appear on screen

INP

Interaction to Next Paint

294ms
Needs Improvement

Good: < 200ms

Measures how quickly the page responds to user interactions

CLS

Cumulative Layout Shift

0.06
Good

Good: < 0.1

Measures visual stability - how much content shifts during page load

AI Performance Analysis

This WordPress site has poor performance with a score of 51/100. The biggest problem is excessive JavaScript processing that's blocking the main thread for 4.5 seconds, causing an extremely slow Time to Interactive of 16.6 seconds and a poor Largest Contentful Paint of 6.6 seconds. The site is also loading oversized images (saving 786 KiB possible) and render-blocking CSS that delays initial page rendering by over 2 seconds. Reducing JavaScript payloads, optimizing images to appropriate sizes, and deferring non-critical scripts could improve the score by 30+ points and dramatically enhance user experience.

Other Optimization Recommendations

Optimize Background Images Delivery

High Impact+25 points estimated

Why It Matters:

Oversized hero image (285KB waste) delays LCP by 2.45 seconds and significantly impacts loading performance.

How to Fix:

Resize the decorative background image from 2880x4643 to actual display dimensions (766x1235). Use WordPress responsive images or install Smush plugin for automatic sizing. Add explicit width='766' height='1235' attributes to prevent layout shifts.

Eliminate Render Blocking CSS

High Impact+15 points estimated

Why It Matters:

Critical CSS blocks first paint by 2.25 seconds, significantly delaying when users see content.

How to Fix:

Use Autoptimize or WP Rocket to inline critical above-the-fold CSS. Remove 87% unused CSS rules from your minified stylesheet. Defer non-critical CSS loading using media='print' onload technique in your WordPress theme.

Keep Your Site Fast After Optimization

Once your site is optimized, maintain that speed. Use DeployHQ for zero-downtime, automated deployments—so performance fixes and updates go live safely every time, without breaking your site.

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