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$295.00
From E to B Grade: 90% Faster Load Time for Osteposten.dk with Zero Visual Changes
Osteposten is a Danish online cheese shop offering a curated selection of artisan cheeses, delivered fresh to customers across Denmark. The store runs on Shopify with a custom Booster theme and serves a growing customer base through a rich, content-heavy homepage.
Danish consumers passionate about quality cheese and artisan food products, shopping online for home delivery.
The Challenge
Improve GTmetrix performance score from E grade to B grade or better, reduce page load time, and improve Core Web Vitals — with absolutely zero visual changes to the storefront.
The store was loading in 12.3 seconds with 337 requests and a 6.07MB page size. The GTmetrix grade was E with a 43% performance score. Critical issues included a lazy-loaded LCP hero image, multiple render-blocking scripts in the head, a duplicate OrderLogic script firing twice on every page load, and Trustpilot spawning 10+ child requests immediately on page load.
Baseline metrics (before)
GTmetrix Grade: E
Performance Score: 43%
Structure Score: 77%
LCP: 2.0s
TBT: 335ms
Fully Loaded: 12.3s
Page Size: 6.07MB
Requests: 337
Solution
A full performance audit was conducted using GTmetrix and PageSpeed Insights waterfall analysis. Every script, stylesheet, and third-party resource was evaluated before any changes were made. All optimizations were applied surgically — no visual changes, no layout alterations, no functionality removed.
Fixed the hero image to load as a priority resource above the fold on both desktop and mobile
Built a flexible toggle in the theme so the LCP priority setting can be controlled per section without future code changes
Deferred and lazy-loaded all non-critical third-party scripts to eliminate render blocking on initial page load
Removed a duplicate app script that was silently executing twice on every page load
Optimised icon font loading to be fully non-blocking
Fixed logo and image dimension handling that was causing layout shifts
Reduced Trustpilot widget impact by loading it only when the user interacts with the page
Full theme file audit and restructure to ensure clean, conflict-free script and style loading order
Used Shopify apps and theme
Result
Results summary The store went from an E grade to a B grade on GTmetrix, exceeding the client's target. Every Core Web Vital metric improved dramatically with no visual changes to the storefront.
Outcome metrics (after)
GTmetrix Grade: B ✅
Performance Score: 77% (+34%)
Structure Score: 92% (+15%)
LCP: 632ms (↓68%)
TBT: 35ms (↓90%)
Fully Loaded: 975ms (↓92%)
Page Size: 678KB (↓89%)
Requests: 37 (↓89%)