--- title: "Vibeszn: Mobile LCP 4.3s to 2.0s & Passing Core Web Vitals | Case Study" description: "Vibeszn is a Shopify store that needed Core Web Vitals optimization to improve search rankings and deliver a faster shopping experience for their customers" lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Article", "headline": "Theme & App Script Optimization for Shopify Core Web Vitals", "description": "Vibeszn is a Shopify store that needed Core Web Vitals optimization to improve search rankings and deliver a faster shopping experience for their customers.", "publisher": { "@type": "Organization", "name": "PageSpeed Matters" } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.pagespeedmatters.com/" }, { "@type": "ListItem", "position": 2, "name": "Proof", "item": "https://www.pagespeedmatters.com/proof" }, { "@type": "ListItem", "position": 3, "name": "Case Studies", "item": "https://www.pagespeedmatters.com/proof/case-studies" }, { "@type": "ListItem", "position": 4, "name": "Vibeszn" } ] } ] --- [![PageSpeed Matters](/assets/logo-DtyG_mQE.png)](/) - [Benefits](/why-speed-matters) - [Services](/services) - [ROI Calculator](/roi) - [Pricing](/pricing) - [Proof](/proof) - [Resources](/resources) - [About](/about) [Speed Audit](/contact) [Let's Talk](/contact) [![PageSpeed Matters](/assets/logo-DtyG_mQE.png)](/) [Benefits](/why-speed-matters)[Services](/services)[ROI Calculator](/roi)[Pricing](/pricing)[Proof](/proof)[Resources](/resources)[About](/about) Popular Services [ Core Web Vitals Optimization ](/services/core-web-vitals-optimization)[ ![WordPress Speed Optimization](data:image/svg+xml,%3csvg%20role='img'%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3e%3ctitle%3eWordPress%3c/title%3e%3cpath%20d='M21.469%206.825c.84%201.537%201.318%203.3%201.318%205.175%200%203.979-2.156%207.456-5.363%209.325l3.295-9.527c.615-1.54.82-2.771.82-3.864%200-.405-.026-.78-.07-1.11m-7.981.105c.647-.03%201.232-.105%201.232-.105.582-.075.514-.93-.067-.899%200%200-1.755.135-2.88.135-1.064%200-2.85-.15-2.85-.15-.585-.03-.661.855-.075.885%200%200%20.54.061%201.125.09l1.68%204.605-2.37%207.08L5.354%206.9c.649-.03%201.234-.1%201.234-.1.585-.075.516-.93-.065-.896%200%200-1.746.138-2.874.138-.2%200-.438-.008-.69-.015C4.911%203.15%208.235%201.215%2012%201.215c2.809%200%205.365%201.072%207.286%202.833-.046-.003-.091-.009-.141-.009-1.06%200-1.812.923-1.812%201.914%200%20.89.513%201.643%201.06%202.531.411.72.89%201.643.89%202.977%200%20.915-.354%201.994-.821%203.479l-1.075%203.585-3.9-11.61.001.014zM12%2022.784c-1.059%200-2.081-.153-3.048-.437l3.237-9.406%203.315%209.087c.024.053.05.101.078.149-1.12.393-2.325.609-3.582.609M1.211%2012c0-1.564.336-3.05.935-4.39L7.29%2021.709C3.694%2019.96%201.212%2016.271%201.211%2012M12%200C5.385%200%200%205.385%200%2012s5.385%2012%2012%2012%2012-5.385%2012-12S18.615%200%2012%200'/%3e%3c/svg%3e) WordPress Speed Optimization ](/services/wordpress-speed-optimization)[ ![WooCommerce Speed 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WooCommerce Speed Optimization ](/services/woocommerce-speed-optimization)[ ![Shopify Speed Optimization](data:image/svg+xml,%3csvg%20role='img'%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3e%3ctitle%3eShopify%3c/title%3e%3cpath%20d='M15.337%2023.979l7.216-1.561s-2.604-17.613-2.625-17.73c-.018-.116-.114-.192-.211-.192s-1.929-.136-1.929-.136-1.275-1.274-1.439-1.411c-.045-.037-.075-.057-.121-.074l-.914%2021.104h.023zM11.71%2011.305s-.81-.424-1.774-.424c-1.447%200-1.504.906-1.504%201.141%200%201.232%203.24%201.715%203.24%204.629%200%202.295-1.44%203.76-3.406%203.76-2.354%200-3.54-1.465-3.54-1.465l.646-2.086s1.245%201.066%202.28%201.066c.675%200%20.975-.545.975-.932%200-1.619-2.654-1.694-2.654-4.359-.034-2.237%201.571-4.416%204.827-4.416%201.257%200%201.875.361%201.875.361l-.945%202.715-.02.01zM11.17.83c.136%200%20.271.038.405.135-.984.465-2.064%201.639-2.508%203.992-.656.213-1.293.405-1.889.578C7.697%203.75%208.951.84%2011.17.84V.83zm1.235%202.949v.135c-.754.232-1.583.484-2.394.736.466-1.777%201.333-2.645%202.085-2.971.193.501.309%201.176.309%202.1zm.539-2.234c.694.074%201.141.867%201.429%201.755-.349.114-.735.231-1.158.366v-.252c0-.752-.096-1.371-.271-1.871v.002zm2.992%201.289c-.02%200-.06.021-.078.021s-.289.075-.714.21c-.423-1.233-1.176-2.37-2.508-2.37h-.115C12.135.209%2011.669%200%2011.265%200%208.159%200%206.675%203.877%206.21%205.846c-1.194.365-2.063.636-2.16.674-.675.213-.694.232-.772.87-.075.462-1.83%2014.063-1.83%2014.063L15.009%2024l.927-21.166z'/%3e%3c/svg%3e) Shopify Speed Optimization ](/services/shopify-speed-optimization)[ ![Wix Speed 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Wix Speed Optimization ](/services/wix-speed-optimization)[ ![BigCommerce Speed Optimization](data:image/svg+xml,%3csvg%20role='img'%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3e%3ctitle%3eBigCommerce%3c/title%3e%3cpath%20d='M12.645%2013.663h3.027c.861%200%201.406-.474%201.406-1.235%200-.717-.545-1.234-1.406-1.234h-3.027c-.1%200-.187.086-.187.172v2.125c.015.1.086.172.187.172zm0%204.896h3.128c.961%200%201.535-.488%201.535-1.35%200-.746-.545-1.35-1.535-1.35h-3.128c-.1%200-.187.087-.187.173v2.34c.015.115.086.187.187.187zM23.72.053l-8.953%208.93h1.464c2.281%200%203.63%201.435%203.63%203%200%201.235-.832%202.14-1.722%202.541-.143.058-.143.259.014.316%201.033.402%201.765%201.48%201.765%202.742%200%201.78-1.19%203.202-3.5%203.202h-6.342c-.1%200-.187-.086-.187-.172V13.85L.062%2023.64c-.13.13-.043.359.143.359h23.631a.16.16%200%200%200%20.158-.158V.182c.043-.158-.158-.244-.273-.13z'/%3e%3c/svg%3e) BigCommerce Speed Optimization ](/services/bigcommerce-speed-optimization)[ ![Webflow Speed Optimization](data:image/svg+xml,%3csvg%20role='img'%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3e%3ctitle%3eWebflow%3c/title%3e%3cpath%20d='m24%204.515-7.658%2014.97H9.149l3.205-6.204h-.144C9.566%2016.713%205.621%2018.973%200%2019.485v-6.118s3.596-.213%205.71-2.435H0V4.515h6.417v5.278l.144-.001%202.622-5.277h4.854v5.244h.144l2.72-5.244H24Z'/%3e%3c/svg%3e) Webflow Speed Optimization ](/services/webflow-speed-optimization)[ ![Squarespace Speed Optimization](data:image/svg+xml,%3csvg%20role='img'%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3e%3ctitle%3eSquarespace%3c/title%3e%3cpath%20d='M22.655%208.719c-1.802-1.801-4.726-1.801-6.564%200l-7.351%207.35c-.45.45-.45%201.2%200%201.65.45.449%201.2.449%201.65%200l7.351-7.351c.899-.899%202.362-.899%203.264%200%20.9.9.9%202.364%200%203.264l-7.239%207.239c.9.899%202.362.899%203.263%200l5.589-5.589c1.836-1.838%201.836-4.763.037-6.563zm-2.475%202.437c-.451-.45-1.201-.45-1.65%200l-7.354%207.389c-.9.899-2.361.899-3.262%200-.45-.45-1.2-.45-1.65%200s-.45%201.2%200%201.649c1.801%201.801%204.726%201.801%206.564%200l7.351-7.35c.449-.487.449-1.239.001-1.688zm-2.439-7.35c-1.801-1.801-4.726-1.801-6.564%200l-7.351%207.351c-.45.449-.45%201.199%200%201.649s1.2.45%201.65%200l7.395-7.351c.9-.899%202.371-.899%203.27%200%20.451.45%201.201.45%201.65%200%20.421-.487.421-1.199-.029-1.649h-.021zm-2.475%202.437c-.45-.45-1.2-.45-1.65%200l-7.351%207.389c-.899.9-2.363.9-3.265%200-.9-.899-.9-2.363%200-3.264l7.239-7.239c-.9-.9-2.362-.9-3.263%200L1.35%208.719c-1.8%201.8-1.8%204.725%200%206.563%201.801%201.801%204.725%201.801%206.564%200l7.35-7.351c.451-.488.451-1.238%200-1.688h.002z'/%3e%3c/svg%3e) Squarespace Speed Optimization ](/services/squarespace-speed-optimization) [Book a Call](/contact) ![](/assets/vibeszn-CgzK4Wvb.png) [Back to Case Studies](/proof/case-studies) Core Web Vitals # Theme & App Script Optimization for Shopify Core Web Vitals Lifestyle & Apparel · < 10 Employees · Shopify 100% Mobile TBT Eliminated 53% Mobile LCP Reduction 100% Desktop TBT Eliminated ## Project Overview Vibeszn is a Shopify store that needed Core Web Vitals optimization to improve search rankings and deliver a faster shopping experience for their customers. The store's theme and third-party apps were creating performance bottlenecks, particularly around LCP and INP. These issues were impacting both organic rankings and the shopping experience on mobile devices. ## Goals & Objectives The primary goal of this project was to improve Google's Core Web Vitals, site speed, and overall user experience and usability. Our primary goals were to: - Eliminate Total Blocking Time on both devices - Reduce mobile LCP below 2.5s - Reduce mobile CLS below 0.1 Company Name Vibeszn Company Size < 10 Employees Industry Lifestyle & Apparel Platform Shopify ## Outcomes: Core metrics that improved over the duration of the project. 100% Mobile TBT Eliminated Mobile TBT reduced from 890ms to 0ms. 53% Mobile LCP Reduction Mobile LCP dropped from 4.3s to 2.0s. 100% Desktop TBT Eliminated Desktop TBT reduced from 1,490ms to 0ms. ## Before vs After Before Metric Score Desktop FCP 0.5s Desktop LCP 1.0s Desktop TBT 1,490ms Desktop CLS 0.011 Desktop SI 1.8s Mobile FCP 2.3s Mobile LCP 4.3s Mobile TBT 890ms Mobile CLS 0.123 Mobile SI 8.7s After Metric Score Desktop FCP 0.3s Desktop LCP 0.6s Desktop TBT 0ms Desktop CLS 0 Desktop SI 0.7s Mobile FCP 1.2s Mobile LCP 2.0s Mobile TBT 0ms Mobile CLS 0.014 Mobile SI 1.9s ## Our Approach A systematic, step-by-step process tailored to Vibeszn's needs. 1 ### Performance Audit Identified key bottlenecks in theme code and app scripts. 2 ### Theme Optimization Streamlined Liquid templates and reduced render-blocking resources. 3 ### App Script Management Deferred and optimized third-party app loading. 4 ### Image Optimization Implemented proper sizing, formats, and lazy loading. 5 ### CWV Validation Validated improvements against real user data. ## Key Takeaways Shopify app scripts are often the biggest performance bottleneck. Theme-level Liquid optimization delivers consistent improvements across all pages. Mobile-first optimization is critical for e-commerce stores. ## Latest Case Studies [![NSAR](/assets/nsar-CA3Du5tg.jpg) Core Web Vitals WooCommerce NSAR E-Commerce WooCommerce Service Animal Support | < 10 Employees ### How We Helped National Service Animal Registry Improve Site Speed and Pass Core Web Vitals Read Case Study](/proof/case-studies/nsarco) [![Try Something More](/assets/try-something-more-D54ZNz-1.png) Core Web Vitals WordPress Try Something More Content WordPress Lifestyle & Content | < 10 Employees ### Plugin Reduction & Template-Level CWV Optimization for Content-Heavy WordPress Site Read Case Study](/proof/case-studies/try-something-more) [![Her Fantasy Box](/assets/her-fantasy-box-CNC8Ngq7.webp) Core Web Vitals Shopify Plus Her Fantasy Box E-Commerce Shopify Plus Health & Wellness | < 50 Employees ### How We Helped Her Fantasy Box Improve Site Speed by 300% and Pass Core Web Vitals Read Case Study](/proof/case-studies/her-fantasy-box) [![Sana Benefits](/assets/sana-benefits-BJOIqgen.png) Core Web Vitals WordPress Sana Benefits B2B WordPress Insurance | 200-500 Employees ### How We Helped Sana Benefits Improve Site Speed by 250% and Pass Core Web Vitals Read Case Study](/proof/case-studies/sana-benefits) [![Whistleblower Partners](/assets/whistleblower-partners-7MU0S4cS.webp) Core Web Vitals Migrated from Squarespace to WordPress Whistleblower Partners Legal Migration Legal Services | 11 to 50 Employees ### How We Helped Whistleblower Partners Improve Site Speed and Migrate 200+ Pages to WordPress Read Case Study](/proof/case-studies/whistleblower-partners) [![Pure Parima](/assets/pure-parima-DnL2KsUd.webp) Core Web Vitals Shopify Pure Parima E-Commerce Shopify Home Furnishings | < 10 Employees ### How We Helped Pure Parima Improve Site Speed and Pass Core Web Vitals Read Case Study](/proof/case-studies/pure-parima) [![Therapevo](/assets/therapevo-BaKBbgzb.webp) Core Web Vitals WordPress Therapevo Healthcare WordPress Therapy and Counseling | < 10 Employees ### How We Helped Therapevo Improve Site Speed and Pass Core Web Vitals Read Case Study](/proof/case-studies/therapevo) [![Premium Ghostwriting Academy](/assets/premium-ghostwriting-XV0rQel8.png) Core Web Vitals Webflow Premium Ghostwriting Academy Education Webflow Education & Coaching | < 10 Employees ### Animation Optimization & CWV Fix for Webflow Membership Site Read Case Study](/proof/case-studies/premium-ghostwriting-academy) ## Want Results Like These? 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