--- title: "BigCommerce Speed Optimization Service | PageSpeed Matters" description: "BigCommerce speed optimization service. Stencil, app, and image tuning to make your store load fast and convert more." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Service", "name": "BigCommerce Speed Optimization Service", "serviceType": "BigCommerce Speed Optimization", "description": "BigCommerce speed optimization service for growing stores. Stencil theme, app script, and image delivery tuning to make your BigCommerce store load fast and convert.", "provider": { "@type": "Organization", "name": "PageSpeed Matters", "url": "https://www.pagespeedmatters.com" }, "areaServed": "Worldwide" }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.pagespeedmatters.com/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "https://www.pagespeedmatters.com/services" }, { "@type": "ListItem", "position": 3, "name": "BigCommerce Speed Optimization Service" } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What is BigCommerce speed optimization?", "acceptedAnswer": { "@type": "Answer", "text": "BigCommerce speed optimization is the process of reducing a BigCommerce store's load time by auditing app scripts, trimming render-blocking Stencil theme code, compressing and resizing images, and deferring third-party tags. Done well, it lifts Core Web Vitals, search rankings, and conversion rate without changing how the store looks." } }, { "@type": "Question", "name": "Is BigCommerce optimization different from Shopify optimization?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. BigCommerce uses its own Stencil theme engine with Handlebars templates and front-matter data fetching, which creates unique optimization opportunities. We specialize in BigCommerce-specific bottlenecks that generic speed tools can't address." } }, { "@type": "Question", "name": "Will optimization affect my store's functionality?", "acceptedAnswer": { "@type": "Answer", "text": "Your store will work exactly the same, just faster. We optimize script loading, template rendering, and asset delivery without changing any store functionality." } }, { "@type": "Question", "name": "Do you work with headless BigCommerce?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. We optimize both Stencil-based stores and headless implementations (Next.js, Gatsby, custom React). Headless builds need API optimization, efficient data fetching, and client-side rendering performance." } }, { "@type": "Question", "name": "Do you work with BigCommerce Enterprise?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. We optimize all BigCommerce plans including Standard, Plus, Pro, and Enterprise, as well as custom B2B implementations with shared catalogs and tiered pricing." } }, { "@type": "Question", "name": "Will my product images be affected?", "acceptedAnswer": { "@type": "Answer", "text": "Your images will look identical but load much faster. We implement responsive srcsets, modern formats (WebP/AVIF), proper lazy loading, and correct sizing, all without changing the visual quality of your product photography." } }, { "@type": "Question", "name": "How long does BigCommerce optimization take?", "acceptedAnswer": { "@type": "Answer", "text": "Most BigCommerce stores see significant improvements within 1 to 2 weeks. Complex stores with headless frontends, multi-storefronts, or extensive B2B features may take 2 to 3 weeks. You'll see measurable progress within the first few days." } }, { "@type": "Question", "name": "Can you fix slow BigCommerce admin/control panel?", "acceptedAnswer": { "@type": "Answer", "text": "BigCommerce's admin panel is hosted by BigCommerce and has limited optimization potential. However, we can optimize storefront API calls and webhook configurations that sometimes contribute to perceived admin slowness." } } ] } ] --- [![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 Optimization](data:image/svg+xml,%3csvg%20role='img'%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3e%3ctitle%3eWoo%3c/title%3e%3cpath%20d='M2.227%204.857A2.228%202.228%200%20000%207.094v7.457c0%201.236%201.001%202.237%202.237%202.237h5.36l2.39%202.076-.462-2.076h4.238a2.228%202.228%200%20002.237-2.237V7.094a2.228%202.228%200%2000-2.237-2.237H2.227zm4.636%201.885h.053c.115.002.22.04.316.117a.46.46%200%2001.183.336c.014.098-.003.177-.058.283-.23.422-.418%201.131-.57%202.12-.147.957-.202%201.706-.166%202.24a.694.694%200%2001-.07.387.377.377%200%2001-.31.213c-.153.01-.314-.06-.466-.22-.548-.558-.982-1.393-1.3-2.504-.382.752-.664%201.316-.846%201.692-.347.665-.643%201.005-.888%201.022-.16.012-.295-.122-.412-.403-.302-.771-.624-2.258-.97-4.464a.526.526%200%2001.096-.393c.083-.113.205-.168.37-.18.3-.024.47.114.511.42.183%201.23.384%202.272.596%203.124l1.286-2.453c.117-.224.265-.34.443-.352.258-.018.42.147.483.495.147.78.333%201.445.558%202.01.152-1.493.412-2.57.779-3.234a.452.452%200%2001.386-.26zm2.288.637c.099%200%20.205.01.318.035.411.088.728.313.938.683.19.318.286.699.286%201.156%200%20.607-.154%201.157-.46%201.663-.355.587-.813.884-1.383.884a1.557%201.557%200%2001-.318-.039.763.763%200%2001-.141-.05%201.351%201.351%200%2001-.799-.63%202.277%202.277%200%2001-.28-1.166c0-.605.151-1.158.457-1.658.358-.59.818-.88%201.382-.878zm3.687%200c.099%200%20.205.01.318.035.418.088.728.313.938.683.19.318.283.699.283%201.156%200%20.607-.153%201.157-.459%201.663-.354.587-.812.884-1.382.884a1.557%201.557%200%2001-.318-.039%201.352%201.352%200%2001-.94-.68%202.277%202.277%200%2001-.283-1.166c0-.605.154-1.158.46-1.658.358-.59.818-.88%201.383-.878zm-3.504.636a.636.636%200%2000-.534.373%201.908%201.908%200%2000-.354%201.13c0%20.17.035.354.106.536.087.23.207.35.347.38.147.029.306-.034.478-.187.218-.195.363-.483.446-.87.028-.137.041-.283.041-.436%200-.171-.035-.354-.106-.535-.088-.23-.206-.35-.347-.38a.436.436%200%2000-.077-.011zm3.688%200a.636.636%200%2000-.535.373%201.908%201.908%200%2000-.354%201.13c0%20.17.036.354.107.536.086.23.206.35.347.38.147.029.306-.034.478-.187.217-.195.362-.483.445-.87.024-.137.041-.283.041-.436%200-.171-.035-.354-.106-.535-.088-.23-.206-.35-.347-.38a.436.436%200%2000-.076-.011z'/%3e%3c/svg%3e) 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 Optimization](data:image/svg+xml,%3csvg%20role='img'%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3e%3ctitle%3eWix%3c/title%3e%3cpath%20d='m0%207.354%202.113%209.292h.801a1.54%201.54%200%200%200%201.506-1.218l1.351-6.34a.171.171%200%200%201%20.167-.137c.08%200%20.15.058.167.137l1.352%206.34a1.54%201.54%200%200%200%201.506%201.218h.805l2.113-9.292h-.565c-.62%200-1.159.43-1.296%201.035l-1.26%205.545-1.106-5.176a1.76%201.76%200%200%200-2.19-1.324c-.639.176-1.113.716-1.251%201.365l-1.094%205.127-1.26-5.537A1.33%201.33%200%200%200%20.563%207.354H0zm13.992%200a.951.951%200%200%200-.951.95v8.342h.635a.952.952%200%200%200%20.951-.95V7.353h-.635zm1.778%200%203.158%204.66-3.14%204.632h1.325c.368%200%20.712-.181.918-.486l1.756-2.59a.12.12%200%200%201%20.197%200l1.754%202.59c.206.305.55.486.918.486h1.326l-3.14-4.632L24%207.354h-1.326c-.368%200-.712.181-.918.486l-1.772%202.617a.12.12%200%200%201-.197%200L18.014%207.84a1.108%201.108%200%200%200-.918-.486H15.77z'/%3e%3c/svg%3e) 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) [Home](/)[Services](/services)BigCommerce Speed Optimization Service BigCommerce Speed Optimization Agency for Growing Stores # Expert BigCommerce Speed Optimization Services Stencil theme, app, and image delivery optimization, engineered to speed up your BigCommerce store and lift conversions. BigCommerce hosts your store, so the server is out of your hands, but most of the speed is still on the table. App scripts stacking up, render-blocking Stencil theme code, oversized images, and third-party pixels all drag down your store. Our BigCommerce speed optimization service audits every app and theme asset, removes the dead weight, and tunes image and script delivery so your store loads fast and converts more visitors. [Speed Up My BigCommerce Store](/contact) Pass Core Web Vitals Free BigCommerce Speed Audit Step 1 of 2 ### How can we help? (select all that apply) My website feels slowSlow speed is hurting our rankings or conversionsWe want to pass Core Web Vitals Website URL Next Trusted by leading brands Platterful Pure Parima Her Fantasy Box Sana Benefits Yakka Finance Therapevo NSAR Whistleblower Partners Platterful Pure Parima Her Fantasy Box Sana Benefits Yakka Finance Therapevo NSAR Whistleblower Partners Our Expertise ## Work With a BigCommerce Speed Optimization Expert Most speed apps promise a one-click fix and add another script to your store. We don't. Every engagement is run by a BigCommerce speed optimization expert who profiles your store at the code level: every installed app and its scripts, Stencil theme render cost, and image and pixel weight. Then we cut what is not earning its place and tune the rest. Growing stores come to us as their BigCommerce speed optimization agency because we show our work. You get a ranked app-impact report, before and after Core Web Vitals data, and documentation of every change, not a black box. 1,500+ Optimization projects 100% Core Web Vitals pass rate 90+ PageSpeed scores ![Matt Suffoletto, Founder & CEO of PageSpeed Matters and BigCommerce speed optimization expert](/assets/matt-CEkmAuBN.jpg) Matt Suffoletto Founder & CEO BigCommerce Speed Optimization Expert Who This Is For ## Is This Right for You? ### Product Stores Product-based stores need fast collection pages, image-heavy product pages, and instant filtering. Physical goods Fashion & apparel Electronics Home & garden ### B2B & Wholesale B2B stores with customer-specific pricing and complex catalogs need fast search and account pages. Custom pricing Purchase orders Quote management Company accounts ### Multi-Storefront Multi-storefront setups need each storefront independently optimized for its target audience. Multiple brands Regional stores Multi-currency B2B + B2C ### Headless Commerce Headless BigCommerce builds need optimized API calls, efficient data fetching, and fast client-side rendering. Next.js frontend Gatsby Custom PWA React storefront Common Problems ## What's Slowing You Down? ### Stencil Theme Bloat BigCommerce's Stencil themes accumulate customizations over time. Unused Handlebars partials, excessive front-matter data fetching, and render-blocking CSS/JS compound into slow page loads. ### App Script Overload Every installed BigCommerce app adds JavaScript, CSS, and API calls to your store. Reviews, upsells, chat widgets, and analytics tools compound into 2–4 seconds of extra load time. ### Slow Product & Category Pages Large product catalogs with high-res images, variant selectors, and faceted search create heavy pages. Unoptimized product images alone can account for 60%+ of page weight. ### Checkout & Cart Abandonment Payment gateway scripts, shipping calculators, and third-party checkout integrations make the most revenue-critical pages the slowest, driving up cart abandonment rates. Our Solutions ## How We Speed Up Your BigCommerce Store We work on a copy of your theme, so your live store is never at risk. We audit and trim apps, refactor Stencil templates, optimize image and script delivery, and fix Core Web Vitals on your product and category pages. Here is what that covers: 01 ### Stencil Theme Profiling We audit every Handlebars template for rendering efficiency, front-matter data over-fetching, unused partials, and CSS/JS bloat. You receive a ranked impact report with specific optimization recommendations and before/after render times. 02 ### App Impact Analysis & Cleanup We profile every installed app individually for JavaScript weight, API call overhead, and render-blocking behavior. You get a ranked report showing exactly which apps cost the most speed, with vetted faster alternatives and migration steps. 03 ### Image & Asset Optimization We implement responsive srcsets, modern formats (WebP/AVIF), proper lazy loading, and Akamai CDN optimization for all product images, hero banners, and category thumbnails, without sacrificing visual quality. 04 ### Checkout Performance Engineering We defer non-critical payment gateway scripts, optimize shipping rate calculations, reduce DOM complexity on checkout, and ensure the most revenue-critical pages load in under 2 seconds. 05 ### Core Web Vitals Engineering We target LCP, INP, and CLS individually, fixing layout shifts from product galleries, optimizing interaction handlers on collection pages, and monitoring real-user CrUX data until all metrics pass Google's 28-day rolling window. 06 ### Performance Safeguarding After deployment, we provide 30 days of monitoring to catch regressions from app updates, theme changes, or BigCommerce platform updates. You receive a Speed Budget Document with max JS size, image targets, and app limits. The Data ## What Happens When You Improve BigCommerce Site Speed On an ecommerce store, speed is conversion rate. When you improve BigCommerce site speed, faster product and category pages keep shoppers moving toward checkout, lift organic traffic from passing Core Web Vitals, and lower your cost per click through a better Quality Score. 53% of mobile visitors leave if a page takes longer than 3 seconds to load [Source: Google](https://www.thinkwithgoogle.com/marketing-strategies/app-and-mobile/mobile-page-speed-new-industry-benchmarks/) ~7% conversion loss from a 1-second delay [Source: Portent](https://www.portent.com/blog/analytics/research-site-speed-hurting-everyones-revenue.htm) 70% more organic traffic for sites passing Core Web Vitals [Source: Google](https://web.dev/articles/vitals/) ~1% more conversions per 100ms faster load time [Source: Deloitte/Google](https://www2.deloitte.com/ie/en/pages/consulting/articles/milliseconds-make-millions.html) Proof ## Our Results Real stores, real speed improvements, real revenue impact. [![Liz Mathe](/assets/liz-mathe-BS3yUOes.png) BigCommerce ### Liz Mathe Stencil theme optimization with improved PageSpeed and Core Web Vitals across all product pages. View Case Study](/proof/case-studies/liz-mathe) [![Platterful](/assets/platterful-CbVyuYDq.jpg) Recent Case Study ### Platterful 80% speed improvement, 20% conversion lift. Mobile score from 50s to 90+. View Case Study](/proof/case-studies/platterful) [![Pure Parima](/assets/pure-parima-DnL2KsUd.webp) Recent Case Study ### Pure Parima 38% LCP improvement, 100% CLS fix. Passed all Core Web Vitals. View Case Study](/proof/case-studies/pure-parima) [See All Case Studies](/proof/case-studies) ROI Calculator ## How Much Revenue Is Your Slow Site Costing You? Enter your URL, in 30 seconds, you'll see exactly how much revenue slow speed is costing you. 1 Analyze Site 2 Refine Estimate 3 Your Results Enter your website URL https:// Analyze My Site 10,000+ sites analyzed · No login required · See your losses in 30 seconds Our Process ## How It Works 01 ### Staging & Full Audit We run a comprehensive performance audit, PageSpeed, Core Web Vitals, Stencil template profiling, app script analysis, and real-device testing. Your live store is never touched during this phase. 02 ### App & Template Impact Ranking Every installed app and Stencil template is profiled individually for rendering time, JavaScript footprint, and API overhead. You receive a ranked report showing exactly which components cost the most speed. 03 ### Optimization Sprint 1 to 2 Weeks Over 1–2 weeks, we implement all fixes: Stencil template optimization, app script deferral, Critical CSS generation, image optimization, and checkout tuning. Zero downtime to your live store. 04 ### Core Web Vitals Fine-Tuning 2 to 4 Weeks We monitor real-user field data (CrUX) over 2–4 weeks, making iterative adjustments until LCP, INP, and CLS consistently pass in Google's 28-day rolling window, lab scores. 05 ### Deployment & Documentation Once validated, all changes go live. You receive complete documentation of every change made, a speed budget for future development, and a before/after performance report. Deliverables ## What You'll Receive Every engagement includes comprehensive documentation and reporting. ### Before/After Speed Report PageSpeed and Core Web Vitals scores before and after optimization, with waterfall comparisons. ### App Impact Report Every installed app ranked by JavaScript weight, API calls, and render-blocking behavior with specific load-time cost. ### App Replacement Playbook For every slow app identified, a vetted faster alternative with step-by-step migration instructions. ### Stencil Theme Audit Detailed analysis of Handlebars templates, front-matter configuration, and CSS/JS delivery with optimization results. ### Competitor Speed Benchmark How your store stacks up against 3–5 direct competitors on LCP, TTFB, and Speed Index. ### Core Web Vitals Forecast Projecting exactly which metrics (LCP, CLS, INP) will move into the 'Green' zone, with expected timelines. ### Image Optimization Report Analysis of product image delivery, format optimization, and CDN configuration with before/after file sizes. ### Revenue Impact Projection Custom report mapping your speed improvements to projected revenue gains using your actual traffic and conversion data. ### Google Ads / CPC Savings Report Analysis of how improved page speed lowers your Quality Score penalty and reduces cost-per-click for paid campaigns. ### 30-Day Post-Launch Monitoring 30 days of monitoring after deployment to ensure gains hold after app updates, theme changes, or platform updates. ### SEO Impact Forecast Projected ranking improvements based on Core Web Vitals fixes, with estimated organic traffic gains from your Search Console data. ### Speed Budget Document A living document setting performance budgets for future development, max JS size, image targets, app limits. ### Executive Summary (1-Pager) A non-technical summary for stakeholders showing what was done, what improved, and what it means in dollars. ### Checkout Performance Audit Page-by-page analysis of cart, checkout, and account pages with specific optimization recommendations. ### Third-Party Script Analysis Every external script identified and categorized with defer, async, or remove recommendations. Pricing ## Transparent Speed Optimization Pricing Get an instant estimate based on your site profile. No hidden fees, no lock-in contracts, just measurable speed improvements and revenue gains. Step 1 of 8 Takes ~2 minutes GoalPlatformTrafficCustom Code3rd-PartySizeYour InfoYour Price ### What's your main goal? Pick the outcome that matters most to you. Improve Load Times I want my website to load faster Improve Load Times & Pass CWV Faster site + pass Google's Core Web Vitals Not Sure I just want a faster website ← BackNext What We Optimize ## Optimize BigCommerce Site Speed at Every Layer On BigCommerce the server is managed, so the biggest wins come from the theme, the apps, and how assets are delivered. We optimize BigCommerce site speed across all three. ### Stencil Theme Optimization Refactor Stencil templates, Handlebars partials, and front-matter to cut render time and reduce TTFB on product and category pages. Stencil Handlebars Front Matter ### Script & Asset Delivery Audit every third-party script and pixel, defer non-critical JavaScript, inline critical CSS, and remove render-blocking assets so the page paints sooner. Script Defer Critical CSS Asset Pipeline ### App Impact Profiling Profile each installed BigCommerce app for JavaScript weight, API overhead, and main-thread cost. Replace or remove the heaviest offenders without losing functionality. App Audit API Tuning Replacement Playbook ### Akamai CDN & Caching Tune BigCommerce's built-in Akamai CDN and cache headers so static assets and pages are delivered from the edge with the right TTLs. Akamai CDN Edge Caching Cache Headers ### Headless & GraphQL Performance Optimize GraphQL and REST calls for headless BigCommerce builds on Catalyst, Next.js, or custom React, with efficient data fetching and edge rendering. GraphQL Catalyst Headless ### BigCommerce Mobile Speed Fix BigCommerce mobile speed at the page level: responsive image delivery, lighter mobile bundles, and BigCommerce LCP improvements on product templates. Mobile LCP Mobile JS Responsive Images Deep Dives ## BigCommerce Speed Guides Explore our wider library of speed and Core Web Vitals guides below. [ ### The Complete Guide to Core Web Vitals ](/resources/guides/complete-core-web-vitals-guide) FAQ ## Frequently Asked Questions ### ### What is BigCommerce speed optimization? BigCommerce speed optimization is the process of reducing a BigCommerce store's load time by auditing app scripts, trimming render-blocking Stencil theme code, compressing and resizing images, and deferring third-party tags. Done well, it lifts Core Web Vitals, search rankings, and conversion rate without changing how the store looks. ### ### Is BigCommerce optimization different from Shopify optimization? Yes. BigCommerce uses its own Stencil theme engine with Handlebars templates and front-matter data fetching, which creates unique optimization opportunities. We specialize in BigCommerce-specific bottlenecks that generic speed tools can't address. ### ### Will optimization affect my store's functionality? Your store will work exactly the same, just faster. We optimize script loading, template rendering, and asset delivery without changing any store functionality. ### ### Do you work with headless BigCommerce? Yes. We optimize both Stencil-based stores and headless implementations (Next.js, Gatsby, custom React). Headless builds need API optimization, efficient data fetching, and client-side rendering performance. ### ### Do you work with BigCommerce Enterprise? Yes. We optimize all BigCommerce plans including Standard, Plus, Pro, and Enterprise, as well as custom B2B implementations with shared catalogs and tiered pricing. ### ### Will my product images be affected? Your images will look identical but load much faster. We implement responsive srcsets, modern formats (WebP/AVIF), proper lazy loading, and correct sizing, all without changing the visual quality of your product photography. ### ### How long does BigCommerce optimization take? Most BigCommerce stores see significant improvements within 1 to 2 weeks. Complex stores with headless frontends, multi-storefronts, or extensive B2B features may take 2 to 3 weeks. You'll see measurable progress within the first few days. ### ### Can you fix slow BigCommerce admin/control panel? BigCommerce's admin panel is hosted by BigCommerce and has limited optimization potential. However, we can optimize storefront API calls and webhook configurations that sometimes contribute to perceived admin slowness. Testimonials ## What BigCommerce Clients Say "Platterful saw major improvements in site speed after working with Matt and the PageSpeed Matters team. They took our mobile score from the 50s to over 90 while keeping SEO intact. They were responsive, helpful, and continued to support us even after the project ended. Highly recommend." Mobile score: 50s → 90+ • Conversions: +20% L Lowell Co-Founder, Platterful "Outstanding results! Matt and his team delivered measurable outcomes for our company, something larger firms promised but never followed through on. Truly impressive work!" Passed Core Web Vitals on key pages CS Cody Stehlik NSAR "Matt was thoughtful, professional and competent. His communication skills are excellent and he is a pleasure to work with. The project was a success and we highly recommend Matt and the PageSpeed Matters team." Mobile LCP 8.0s → 3.0s • Mobile Score 59 → 94 MM Monthly Moxie Subscription Box Store ## Ready to Get Started? Request an audit and see exactly how we can improve your BigCommerce store's performance. [Request An Audit](/contact) ![Speed performance gauge showing optimized score](/assets/speedometer-cta-6n4CDsP4.png) Sources [Google Mobile Speed Benchmarks ↗](https://www.thinkwithgoogle.com/marketing-strategies/app-and-mobile/mobile-page-speed-new-industry-benchmarks/)[Google Search Central ↗](https://developers.google.com/search/docs/appearance/core-web-vitals)[Portent Site Speed Study ↗](https://www.portent.com/blog/analytics/research-site-speed-hurting-everyones-revenue.htm) [![PageSpeed Matters](/assets/logo-DtyG_mQE.png)](/) We optimize website load times to rank higher, decrease advertising costs, and convert more often. 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