Shopify Performance Optimization — Case Study

05Ecommerce / Shopify

Buildaze optimized Shopify theme code, assets, and front-end delivery. A documented lab Lighthouse Performance score moved from 28 to 91 — not a field CWV or revenue claim.

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All work

28 → 91Lighthouse Performance (lab)

Timeline · Scoped performance engagement

shopify · performance auditLive

Lighthouse28 → 91

LCP

Optimized

INP

Reviewed

CLS

Reviewed

Theme JS

Reviewed

01Challenge

The storefront looked presentable but felt heavy: theme debt, scripts, apps, and media were competing with the shopping experience.

Performance had become a business problem — not only a lab score — because slow product and collection pages undermine shopping confidence on mobile.

02Approach

We audited theme architecture, JavaScript weight, app impact, image delivery, and critical rendering paths before recommending changes.

Optimization focused on maintainable theme cleanup and front-end delivery — keeping the brand experience intact rather than gutting design for synthetic scores.

Mobile shopping paths were reviewed alongside performance so speed gains would support conversion clarity, not just lab metrics.

03Results

Documented Lighthouse Performance score improved from 28 to 91 (lab score — not a Core Web Vitals field claim or revenue outcome). Exact tool version, device profile and test date remain recorded with the project evidence pack where available.

Storefront architecture became easier to maintain for ongoing Shopify development.

The engagement stayed scoped to performance and experience. Revenue outcomes are not inferred from the lab score alone.

04Project details

Deliverables