Shopify Engineering
REF: AUD-85-75332 • LONDON EDGE DIAGNOSTIC
Optimization Opportunities Detected

Shopify Technical Performance Analysis

Store: gymshark.com • Platform: Shopify • Audit Date: 24 Oct 2026
Mobile Storefront Latency Rating 90/100 • Fast
0.0s (Sub-300ms Edge) < 1.5s (Sprint Benchmark) 3.0s+ (Friction Threshold)
Mobile Conversion Friction
-3.3%
Estimated checkout completion drag
Revenue Impact Calculator
-$1,650/mo
Based on
Server Response (TTFB)
343ms
Edge origin response (0.34s)
Active Script Tags
36
Target budget: < 30 tags

Mobile Checkout Loading Simulation

Visual execution race calibrated under mobile 4G network latency (150ms round-trip).

Current Storefront 0.0s
Waiting for server response...
✖ Delayed Main-Thread Interaction
Est. Latency: 0.34s TTFB • Drag: -3.3%
EightyFive Duplicate Staging 0.0s
Edge DNS & sub-350ms response...
✔ Verified Sub-1.5s Guarantee Target
Target Latency: <0.35s TTFB • Vitals: 95+ Score
Executive Impact Assessment

Why Speed Directs Top-Line E-Commerce Revenue

Google and Cloudflare consumer research confirms that every 100ms of mobile storefront delay creates an approximate 1% drop in checkout conversion rates. For a storefront generating $30,000+ per month, reducing the initial server latency and deferring render-blocking review widgets safely recovers an estimated $2,500 to $5,000 in previously lost transactions each month.

Detailed Technical Diagnostics

Full audit of storefront execution, script blocking, and visual stability.

Diagnostic Parameter Observed Metric Industry Standard Action Status
Initial Server Latency (TTFB) 343ms (0.34s) Sub-350ms response Optimal
Total JavaScript Payloads 36 scripts Fewer than 30 tags Defer
Render-Blocking Script Assets 1 assets 0 to 2 critical assets Optimal
Images Missing Lazy Loading 1 images Zero unoptimized images Fix
Cumulative Layout Shift (CLS) Risk LOW Stable visual rendering Stable

Detected Third-Party Integrations & Widgets:

• Bazaarvoice Reviews• Klarna On-Site Messaging

Tracking & Attribution Integrity

Server-side tagging and pixel verification to ensure complete ROAS attribution across Meta, TikTok, and Google Ads.

✓ Active: Google Analytics 4 (GA4)✓ Active: Server-Side CAPI / Conversions API ✗ Missing: Google Tag Manager (GTM)✗ Missing: Meta Pixel (Facebook)✗ Missing: TikTok Pixel✗ Missing: Pinterest Tag✗ Missing: Klaviyo

Storefront Revenue Recovery Calculator

Drag your estimated monthly store revenue to calculate monthly lost checkout sales from mobile latency and your payback period from a sub-1.5s optimization sprint.

Estimated Monthly Store Revenue: $75,000 / mo
$10,000 $100,000 $250,000 $500,000+
Monthly Revenue Leaked (Current)
$0
Estimated 3.3% mobile checkout drag
Monthly Revenue Recovered
+$0 / mo
Targeting sub-1.5s staging benchmark
Estimated Sprint Payback
0 Days
100% Breakeven ROI on $950 Sprint

Diagnostic Testing Protocol & Methodology

🔬 Calibrated Synthetic Edge Lab

This performance diagnostic for gymshark.com was conducted under EightyFive's calibrated synthetic Edge lab protocol. We emulate mobile network conditions (simulated 4G, 1.6 Mbps download, 150ms round-trip latency) to measure true customer friction rather than unthrottled desktop fiber.

⚡
Server Response & TTFB

Measures initial document response from the hosting edge before DOM parsing begins. Target benchmark is under 400ms.

🛠
Third-Party Thread Contention

Profiles JavaScript execution time spent by external marketing, chat, and review apps blocking the main thread.

🛡
Staging Sandbox Verification

All remediation work is developed on a duplicate staging theme, ensuring zero live store downtime and rigorous benchmark verification.

Fixed Scope Deliverables

Engineering Sprints & Packages

We specialize in Shopify storefront performance engineering. All work is conducted on a duplicate staging sandbox with zero live store downtime, verified against our sub-1.5s speed benchmark before production release.

✓
Sub-1.5s Speed Benchmark

Verified on staging prior to live deployment.

✓
Zero Live Downtime

All work done on duplicate staging environment.

✓
Script Deferral Overhaul

Safely defer review widgets and analytics bloat.

✓
3 to 5 Day Delivery

Rapid deployment by specialist UK engineers.

Most Popular
Speed & Vitals Sprint
$950 one-off
Complete mobile storefront optimization and render-blocking script deferral.
  • ✓ Guaranteed Sub-1.5s Mobile Speed
  • ✓ Third-Party Script Deferral
  • ✓ Duplicate Staging Sandbox Build
  • ✓ 3 to 5 Business Days Delivery
  • ✓ 14 Days Post-Launch Warranty
Secure Speed Sprint ($950) →
Speed & CAPI Tracking Architecture
$1,650 one-off
Full Speed Sprint plus Server-Side Meta Conversions API (CAPI) & GA4 setup.
  • ✓ Everything in Speed & Vitals Sprint
  • ✓ Server-Side Meta Conversions API
  • ✓ Google Analytics 4 Server-Side Setup
  • ✓ TikTok Events API Deduplication
  • ✓ iOS 14.5 Ad Attribution Recovery
Secure Full Overhaul ($1,650) →
Performance & Tracking Retainer
$490 / month
Continuous 24/7 Core Web Vitals monitoring and monthly script hygiene.
  • ✓ 24/7 Core Web Vitals Monitoring
  • ✓ Monthly Orphaned Script Purge
  • ✓ New App Speed Impact Audits
  • ✓ Priority Developer Slack/Email Support
  • ✓ Cancel Anytime
Enquire About Retainer →
Secured by Stripe Payment Methods
✓ Guaranteed Sub-1.5s Speed Benchmark • Backed by EightyFive Performance Warranty • Zero Live Store Downtime