LCP
Largest Contentful Paint
4.4s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize JavaScript Bundle Size
How to optimize technicalhotandcoldparts.com
Optimize JavaScript Bundle Size
High Impact+15 points estimated
Why It Matters
1.4 seconds of JavaScript execution time blocks user interactions and creates 410ms of Total Blocking Time.
How to Fix
Remove or defer the Brevo chat widget (402KB) if not essential for conversions. Audit BigCommerce product widgets for duplicated core-js modules totaling 36KB. Configure unused JavaScript removal in your BigCommerce theme settings to eliminate 362KB of dead code.
0Needs Improvement
What This Score Means
A score of 67 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
457ms
Needs Improvement
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.01
Good
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This BigCommerce website has poor performance with a score of 67/100, primarily caused by excessive JavaScript execution and blocking resources. The biggest problem is a redirect chain that's adding 780ms of delay to every page load, combined with heavy JavaScript from the Brevo chat widget and Google Analytics that's blocking the page from becoming interactive for nearly 12 seconds. The site could see significant improvements by fixing the redirect issue, optimizing JavaScript delivery, and implementing better caching policies for images and scripts, which together could save over 1 second in load time and dramatically improve user experience.
Other Optimization Recommendations
Fix URL Redirect Chain
High Impact+18 points estimatedWhy It Matters:
Redirect from non-www to www adds 780ms delay before any content can load, significantly impacting both FCP and LCP.
How to Fix:
Update your BigCommerce store settings to use www.technicalhotandcoldparts.com as the primary domain. Configure your DNS/CDN to serve the www version directly instead of redirecting. This will eliminate the redirect chain and improve Core Web Vitals by 800ms.
Add Image Dimensions and Optimize
Medium Impact+12 points estimatedWhy It Matters:
Missing width/height attributes cause layout shifts while oversized images waste 578KB of bandwidth and delay LCP by 550ms.
How to Fix:
Add explicit width and height attributes to all images, especially the Parts Counter and blog post images. Configure BigCommerce image optimization to serve WebP format and proper sizing for carousel images (currently 132KB each). Use responsive image srcsets for product thumbnails to match display dimensions.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Generic Speed Tests
Generic Performance Resources
Eliminate Forced Reflows
reCAPTCHA scripts are causing 93ms of forced reflows that degrade rendering performance.
Optimize Critical Resource Loading
The 213ms network dependency chain delays page rendering and could impact Core Web Vitals.
Eliminate Render Blocking CSS
The advertising-big-data.css file blocks initial render for 159ms, potentially delaying FCP and LCP.
Optimize Image Compression and Sizing
The Global Map image wastes 187 KiB and could improve perceived load time and LCP performance.