Performance
· 25 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.
1.45 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.45 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
34 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.
2.33 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.69 s
Page Load Progression
FPage Weight BudgetAction22.2 MB transferred, 103 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
DThird-Party ImpactAction76% third-party, 0 ms blockingFIX
DJS Execution CostAction3060ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://sensitivestones.com/ | 1593ms | 104ms | 2ms | 1st |
| Unattributable | 1466ms | 11ms | 0ms | 3rd |
DPage Weight InventoryAction103 resources · 22.2 MB · 0 KB savings availableFIX
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 103 resources | 22.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization32 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BResource Hints33 hints, 0 missing preconnectsREVIEW
Current Resource Hints
33 resource hints configured
Fonts are always fetched as crossorigin=anonymous; a preload without the attribute creates a different cache key, so the browser refetches when the actual font request happens. Sample: //sensitivestones.com/cdn/fonts/jost/jost_n5.7c8497861ffd15f4e1284cd221f14658b0e95d61.woff2, //sensitivestones.com/cdn/fonts/jost/jost_n7.921dc18c13fa0b0c94c5e2517ffe06139c3615a3.woff2. Add `crossorigin` (or `crossorigin="anonymous"`) to each preload.
Performance issues directly impact user engagement and conversion rates.
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://sensitivestones.com, https://cdn.shopify.com. Remove the redundant dns-prefetch entries.
Performance issues directly impact user engagement and conversion rates.
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://loadspark.myshopify.com/cdn/shop/t/1/assets/network-1.0.0.js (preload+preload+preload), https://cdn.shopify.com (dns-prefetch+preconnect), https://sensitivestones.com/ (dns-prefetch+preconnect).
Performance issues directly impact user engagement and conversion rates.
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BJavaScript Blocking1 JS blocking issue(s) detectedREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (40 KB)PASS
Web fonts
3
40 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
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)
A+JS Bundles37 scripts, 0 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://sensitivestones.com/cdn/shop/t/49/assets/app.min.js?v=74502586755104031401771660434 | 38 KB | — | ✓ | 1st |
| https://sensitivestones.com/cdn/shop/t/49/assets/foxkit-app.min.js?v=48166617155657649261771660476 | 15 KB | — | ✓ | 1st |
| https://sensitivestones.com/cdn/shop/t/49/assets/lazy-image.min.js?v=164341435460352801361771660492 | 1 KB | — | ✓ | 1st |
| https://githubfix.myshopify.com/cdn/shop/t/1/assets/asyncLoadG.js | 2 KB | — | ✓ | 3rd |
| https://loadspark.myshopify.com/cdn/shop/t/1/assets/network-1.0.0.js | 4 KB | — | ✓ | 3rd |
| https://quickstart-41d588e3.myshopify.com/cdn/shop/t/3/assets/viewsB.js | 2 KB | — | ✓ | 3rd |
| https://sensitivestones.com/cdn/shopifycloud/portable-wallets/latest/portable-wallets.en.js | 75 KB | — | ✓ | 1st |
| https://sensitivestones.com/cdn/shopifycloud/shop-js/modules/v2/loader.init-shop-cart-sync.en.esm.js | 1 KB | — | ✓ | 1st |
| https://sensitivestones.com/cdn/shop/t/49/assets/theme-global.aio.min.js?v=183163406347237672661771660560 | 3 KB | — | ✓ | 1st |
| https://sensitivestones.com/cdn/shop/t/49/assets/product-form.min.js?v=68270388290648218341771660517 | 1 KB | — | ✓ | 1st |
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability18 Server-Timing entries advertisedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall103 requests over 1397msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1466ms | 0 KB | — | €8/mo | Costly |
These scripts may cost more than they're worth
- Unattributable adds 1466ms and costs ~€8/month
48% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
Unattributable takes 1466ms 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 (2026-04-10 — 2026-05-07)
LCP (p75)
1460 ms
95% good
INP (p75)
267 ms
66% good
CLS (p75)
0.100
74% good
FCP (p75)
1467 ms
TTFB (p75)
887 ms
Image Optimization72 images, 9803 KB total, 3924 KB wastedINFO
Image Optimization Audit
Total Images
72
Total Size
9803 KB
Oversized
21
Wasted
3924 KB