Performance
· 24 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
651 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.29 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
352 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
913 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
3.80 s
Page Load Progression
FPage Weight BudgetAction7.2 MB transferred, 253 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DJS Execution CostAction3297ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://kieljamespatrick.com/ | 1946ms | 85ms | 19ms | 1st |
| https://cdn.shopify.com/extensions/01a16484-854f-7469-a724-e89397c930cd/judgeme-819/assets/loader.js | 430ms | 121ms | 0ms | 3rd |
| https://wrapin.prezenapps.com/public/js/load-wrapin-v5-app.js?shop=kiel-james-patrick.myshopify.com | 374ms | 372ms | 2ms | 3rd |
| Unattributable | 321ms | 12ms | 0ms | 1st |
| https://kieljamespatrick.com/cdn/wpm/b49d3b31aw169a7c20pfc9cb2c9m68241e55m.js | 172ms | 77ms | 7ms | 1st |
| https://kieljamespatrick.com/cdn/s/trekkie.storefront.6efba1340ec6769622eb0d10b5cb070d43fb8d55.min.js | 54ms | 48ms | 5ms | 1st |
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CJS BundlesAction151 scripts, 227 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.shopify.com/extensions/01a14563-06b1-7e82-8293-28a947dc5aa7/narvar-extensions-248/assets/shipping-protection-shopify.js | 96 KB | 60 KB (63%) | ✓ | 3rd |
| https://options.shopapps.site/js/options.js | 74 KB | 49 KB (66%) | ✓ | 3rd |
| https://cdn.shopify.com/extensions/019c3433-f248-7615-8d8a-d93f3b6a960f/product-options-11/assets/options.js | 68 KB | 47 KB (70%) | ✓ | 3rd |
| https://kieljamespatrick.com/cdn/wpm/b49d3b31aw169a7c20pfc9cb2c9m68241e55m.js | 83 KB | 44 KB (54%) | ✓ | 1st |
| https://kieljamespatrick.com/cdn/shop/t/167/assets/theme.js?v=180335519002586168071778778422 | 38 KB | 27 KB (71%) | ✓ | 1st |
| https://kieljamespatrick.com/cdn/shopifycloud/checkout-web/assets/c1/b8733b27.rTsaDTMX.js | 2 KB | — | ✓ | 1st |
| https://kieljamespatrick.com/cdn/shopifycloud/checkout-web/assets/c1/f67abd2c.ChmFf_ns.js | 2 KB | — | ✓ | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/loader.init-shop-cart-sync.en.esm.js | 1 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/storefront/standard-actions.js | 5 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/client.init-shop-cart-sync_Lin_5CGm.en.esm.js | 1 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
CPage Weight InventoryAction253 resources · 7.2 MB · 227 KB savings availableREVIEW
~226.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 253 resources | 7.2 MiB | ||||||
A+Third-Party Impact8% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization31 images, 0 KB saveablePASS
A+Font Loading5 fonts (165 KB)PASS
Web fonts
5
165 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
Fixing the unchecked items could save ~30 KB and ~60 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Document CompressionDocument response uses brotliPASS
A+Asset CompressionAll 2 asset hosts use brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability1 Server-Timing entries advertisedPASS
AServer Response Intelligence2 server-response signal(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall253 requests over 6246msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.shopify.com cdn.shopify.com | Other | 430ms | 3 KB | — | €2/mo | Costly |
wrapin.prezenapps.com wrapin.prezenapps.com | Other | 374ms | 9 KB | — | €2/mo | Costly |
These scripts may cost more than they're worth
- cdn.shopify.com adds 430ms and costs ~€2/month
- wrapin.prezenapps.com adds 374ms and costs ~€2/month
cdn.shopify.com takes 430ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
wrapin.prezenapps.com takes 374ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-09-23 — 2026-10-20)
LCP (p75)
1102 ms
96% good
INP (p75)
106 ms
90% good
CLS (p75)
0.000
99% good
FCP (p75)
833 ms
TTFB (p75)
424 ms
Image Optimization68 images, 124 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
68
Total Size
124 KB