Case Study: — Core Web Vitals & Performance Optimization for Bullion Knot
Elevating Core Web Vitals without sacrificing design
A premium lifestyle brand, Bullion Knot, sought to enhance their Core Web Vitals performance to improve both user experience and search visibility. Their site performance scores were struggling, with 31 on desktop and 18 on mobile. The brand needed significant improvements without compromising design aesthetics or visual quality.
Our team implemented deep front-end optimization strategies, focusing on CSS, JavaScript, and HTML structure — without relying on image compression.
What was holding performance back
- • Low Core Web Vitals scores (31 desktop, 18 mobile)
- • Render‑blocking CSS and JS delaying critical content
- • Unoptimized HTML structure slowing Largest Contentful Paint (LCP)
- • Execution‑heavy JavaScript impacting Time to Interactive (TTI)
- • Required improvements without compressing product/lifestyle images to preserve brand quality
Code-first optimizations, designed to feel effortless
Three focused streams delivered the biggest wins for performance and Core Web Vitals.
CSS Optimization
- Minified main CSS to reduce transfer size.
- Inlined critical CSS; deferred non‑critical styles.
- Removed unused rules to speed up style calculation.
JavaScript Optimization
- Deferred non‑critical execution for faster first paint.
- Removed redundant/unused scripts.
- Loaded third‑party code asynchronously where possible.
HTML & Structural Optimization
- Refined HTML for efficient parsing and faster LCP.
- Stabilized DOM to minimize layout shifts (CLS).
- Prioritized above‑the‑fold and LCP elements to load early.
Measured performance wins that matter
- Mobile: 18 → 53
- Desktop: 31 → 55
- Faster LCP (Largest Contentful Paint) by prioritizing visible content.
- Reduced CLS (Cumulative Layout Shift) by stabilizing key layout elements.
- Improved FID/TTI (First Input Delay / Time to Interactive) by deferring JavaScript.
Performance that translates into outcomes
Speed improvements improved UX, SEO readiness, and conversion potential—especially on mobile.
Better user experience
Faster rendering of above-the-fold content makes the site feel instantly responsive.
Improved SEO readiness
Higher Core Web Vitals scores support stronger visibility in Google Search.
Stronger conversion potential
Reduced friction on product pages—particularly on mobile—helps more users complete actions.
What the client says
"Highly satisfied with Webrex Studio's work! They understood my brand vision perfectly and made my customer experience smooth. The team was super responsive, patient with revisions, and delivered everything on time. As a non-tech person, I really appreciated how they explained everything in simple terms. Would definitely recommend them to any business looking for Speed optimization, reliable web design and SEO work!"
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