LCP
Largest Contentful Paint
2.9s
Needs Improvement
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize Blog Images Format
How to optimize koku.scripts.com
Optimize Blog Images Format
Medium Impact+8 points estimated
Why It Matters
Blog images are using outdated PNG format, wasting 992 KiB in file size and slowing page load performance.
How to Fix
Convert all blog images from PNG to WebP format using an image optimization tool or server-side conversion. Implement responsive image sizes to serve appropriately sized images (current images are 700x400 but display at 668x382). Add explicit width and height attributes to prevent layout shifts during image loading.
0Needs Improvement
What This Score Means
A score of 74 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
INP
Interaction to Next Paint
200ms
Good
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.15
Needs Improvement
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This website has moderate performance issues with a score of 74/100. The biggest problem is layout instability caused by web fonts loading late, creating a poor user experience as content shifts around while the page loads. Additionally, the site is serving oversized PNG images that could be reduced by nearly 1MB by converting to modern formats like WebP and properly sizing them for display. Fixing these font loading issues and optimizing images could improve the performance score by 15-20 points and significantly reduce the jarring visual shifts users experience.
Other Optimization Recommendations
Eliminate Render Blocking Resources
High Impact+18 points estimatedWhy It Matters:
Render blocking CSS and JavaScript are delaying First Contentful Paint by 1.8 seconds and preventing the page from loading efficiently.
How to Fix:
Defer non-critical CSS by adding media='print' and switching to 'all' onload. Move jQuery and Bootstrap JavaScript to load asynchronously or at the end of the body. Inline critical CSS for above-the-fold content directly in the HTML head.
Fix Font Loading Layout Shifts
High Impact+12 points estimatedWhy It Matters:
Web fonts are causing a CLS score of 0.154 as they load and change text rendering, creating visual instability.
How to Fix:
Add font-display: swap to Google Fonts URL parameters or CSS @font-face declarations. Preload critical fonts using <link rel='preload' as='font'> in the HTML head. Use font metric overrides to match fallback font dimensions and reduce layout shifts.
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Related Performance Analyses
More Generic Speed Tests
Generic Performance Resources
Implement Proper Resource Caching Strategy
No cache headers on 1.4MB of images forces redownloads on every visit, wasting bandwidth and slowing LCP by 4 seconds.
Optimize JavaScript Execution and Minification
JavaScript execution blocks the main thread for 4.4 seconds and unminified files waste 20KB, severely impacting TBT and LCP.
Remove Unused CSS and JavaScript
Unused resources waste 1.3MB bandwidth and delay LCP by 4 seconds, blocking critical rendering.
Fix Font Loading Layout Shifts
Web fonts are causing a CLS score of 0.154 as they load and change text rendering, creating visual instability.