https://dilussoclothing.com
Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
90
GRADE
A
FIX
2
REVIEW
5
PASS
17
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
49
96
100
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.89 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
9.39 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
518 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.
6.03 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.
9.98 s
Page Load Progression
375 ms 750 ms 1.1 s 1.5 s 1.9 s 2.2 s
2.6 s
3.0 sChecks
2717 PASS 5 REVIEW 2 FIX
DJS Execution CostAction2824ms total JS executionFIX
JS Execution Cost
Action2824ms total JS execution
2824ms total JS execution
Warning::
Unattributable: 823ms CPU time
Warning::
https://dilussoclothing.com/cdn/wpm/b9f5e2762wb720...: 639ms CPU time
Warning::
https://dilussoclothing.com/: 508ms CPU time
Warning::
https://connect.facebook.net/en_US/fbevents.js: 261ms CPU time
Info::
https://dilussoclothing.com/cdn/shopifycloud/perf-...: 153ms CPU time
Info::
Third-party scripts: 511ms (18% of total)
Main Thread Breakdown
Script Evaluation 50% Other 33% Style & Layout 8% Script Parsing & Compilation 6%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 823ms | 60ms | 0ms | 1st |
| https://dilussoclothing.com/cdn/wpm/b9f5e2762wb720532ap19708c42m93b2bec3m.js | 639ms | 519ms | 28ms | 1st |
| https://dilussoclothing.com/ | 508ms | 115ms | 19ms | 1st |
| https://connect.facebook.net/en_US/fbevents.js | 261ms | 210ms | 41ms | 3rd |
| https://dilussoclothing.com/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.11.0.min.js | 153ms | 113ms | 7ms | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_cLcgCW8c.esm.js | 135ms | 129ms | 0ms | 3rd |
| https://dilussoclothing.com/cdn/s/trekkie.storefront.32ff6085714fe9c4d5859e332c5de5f8759a859e.min.js | 134ms | 102ms | 30ms | 1st |
| https://connect.facebook.net/signals/config/1303334274408561?v=2.9.419&r=stable&domain=dilussoclothing.com&im=1&hme=7459fa3e38c2784dbaf309537bed5fa7e8560fab51fb61e53e5ffafeb46a02a9&ex_m=118%2C241%2C171%2C27%2C82%2C83%2C162%2C78%2C77%2C11%2C181%2C102%2C20%2C153%2C141%2C46%2C85%2C90%2C149%2C176%2C183%2C8%2C4%2C5%2C7%2C6%2C3%2C103%2C115%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C163%2C87%2C126%2C22%2C24%2C51%2C47%2C49%2C48%2C95%2C104%2C108%2C124%2C160%2C164%2C53%2C125%2C29%2C26%2C133%2C79%2C43%2C166%2C165%2C167%2C157%2C155%2C30%2C42%2C66%2C123%2C178%2C80%2C21%2C128%2C93%2C76%2C23%2C97%2C98%2C130%2C96%2C151%2C150%2C154%2C109%2C177%2C180%2C41%2C56%2C127%2C54%2C161%2C72%2C185%2C110%2C184%2C210%2C255%2C84%2C274%2C273%2C272%2C14%2C25%2C28%2C40%2C62%2C117%2C68%2C10%2C73%2C111%2C112%2C113%2C119%2C144%2C38%2C36%2C146%2C147%2C148%2C143%2C142%2C172%2C86%2C175%2C173%2C174%2C57%2C69%2C67%2C137%2C19%2C179%2C52%2C324%2C325%2C326%2C323%2C339%2C361%2C248%2C237%2C70%2C238%2C236%2C364%2C355%2C59%2C249%2C121%2C145%2C92%2C135%2C61%2C134%2C140%2C139%2C65%2C74%2C168%2C88%2C89%2C129%2C44%2C39%2C60%2C63%2C114%2C182%2C1%2C138%2C16%2C136%2C12%2C2%2C64%2C105%2C15%2C75%2C71%2C132%2C101%2C100%2C187%2C188%2C106%2C107%2C9%2C116%2C186%2C58%2C158%2C99%2C91%2C81%2C131%2C120%2C169%2C50%2C159%2C0%2C94%2C152%2C156%2C170%2C45%2C122%2C13%2C189 | 114ms | 79ms | 35ms | 3rd |
| https://dilussoclothing.com/cdn/shopifycloud/storefront/assets/shopify_pay/storefront-f0e26bdf.js?v=20250812 | 56ms | 49ms | 7ms | 1st |
FHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.6 MB transferred, 215 requestsREVIEW
Page Weight Budget
Action1.6 MB transferred, 215 requests
1.6 MB transferred, 215 requests
Info::
Page weighs 2.5 MB (1.6 MB transferred)
Warning::
JavaScript is 561 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 561 KB
Warning::
215 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.34 g CO2 per page load
1.6 MB transferred
215 requests
0.34 g CO2 per page load
Other 710.1 KiB 43%
JavaScript 560.5 KiB 34%
Fonts 175.8 KiB 11%
Images 100.4 KiB 6%
HTML 63.4 KiB 4%
CSS 35.1 KiB 2%
Other 15.8 KiB 1%
Other 6.6 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
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.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
BJS Bundles150 scripts, 109 KB unusedREVIEW
JS Bundles
150 scripts, 109 KB unused
150 scripts, 109 KB unused
Warning::
https://dilussoclothing.com/cdn/wpm/b9f5e2762wb720...: 39 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://connect.facebook.net/en_US/fbevents.js: 38 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://connect.facebook.net/signals/config/130333...: 32 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 109 KB
109 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://dilussoclothing.com/cdn/wpm/b9f5e2762wb720532ap19708c42m93b2bec3m.js | 83 KB | 39 KB (47%) | ✓ | 1st |
| https://connect.facebook.net/en_US/fbevents.js | 111 KB | 38 KB (34%) | ✓ | 3rd |
| https://connect.facebook.net/signals/config/1303334274408561?v=2.9.419&r=stable&domain=dilussoclothing.com&im=1&hme=7459fa3e38c2784dbaf309537bed5fa7e8560fab51fb61e53e5ffafeb46a02a9&ex_m=118%2C241%2C171%2C27%2C82%2C83%2C162%2C78%2C77%2C11%2C181%2C102%2C20%2C153%2C141%2C46%2C85%2C90%2C149%2C176%2C183%2C8%2C4%2C5%2C7%2C6%2C3%2C103%2C115%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C163%2C87%2C126%2C22%2C24%2C51%2C47%2C49%2C48%2C95%2C104%2C108%2C124%2C160%2C164%2C53%2C125%2C29%2C26%2C133%2C79%2C43%2C166%2C165%2C167%2C157%2C155%2C30%2C42%2C66%2C123%2C178%2C80%2C21%2C128%2C93%2C76%2C23%2C97%2C98%2C130%2C96%2C151%2C150%2C154%2C109%2C177%2C180%2C41%2C56%2C127%2C54%2C161%2C72%2C185%2C110%2C184%2C210%2C255%2C84%2C274%2C273%2C272%2C14%2C25%2C28%2C40%2C62%2C117%2C68%2C10%2C73%2C111%2C112%2C113%2C119%2C144%2C38%2C36%2C146%2C147%2C148%2C143%2C142%2C172%2C86%2C175%2C173%2C174%2C57%2C69%2C67%2C137%2C19%2C179%2C52%2C324%2C325%2C326%2C323%2C339%2C361%2C248%2C237%2C70%2C238%2C236%2C364%2C355%2C59%2C249%2C121%2C145%2C92%2C135%2C61%2C134%2C140%2C139%2C65%2C74%2C168%2C88%2C89%2C129%2C44%2C39%2C60%2C63%2C114%2C182%2C1%2C138%2C16%2C136%2C12%2C2%2C64%2C105%2C15%2C75%2C71%2C132%2C101%2C100%2C187%2C188%2C106%2C107%2C9%2C116%2C186%2C58%2C158%2C99%2C91%2C81%2C131%2C120%2C169%2C50%2C159%2C0%2C94%2C152%2C156%2C170%2C45%2C122%2C13%2C189 | 93 KB | 32 KB (35%) | ✓ | 3rd |
| https://dilussoclothing.com/cdn/shop/t/7/assets/constants.js?v=132983761750457495441785091532 | 1 KB | — | ✓ | 1st |
| https://cdn.shopify.com/storefront/standard-events.js | 3 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/loader.init-shop-cart-sync.en.esm.js | 1 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/loader.shop-follow-button.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_Ck8hl9Mr.en.esm.js | 2 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.document_DMcRsBXN.esm.js | 1 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
Why this matters
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.
Why this matters
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.
Why this matters
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
Main HTML Cache-Control
No Cache-Control header on main HTML response
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
CPage Weight InventoryAction215 resources · 1.6 MB · 109 KB savings availableREVIEW
Page Weight Inventory
Action215 resources · 1.6 MB · 109 KB savings available
215 resources · 1.6 MB · 109 KB savings available
Warning::
Page weight 1.6 MB exceeds 1 MB target by 644 KB
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~109 KB of savings available
Info::
75 third-party resources (27% of weight)
215 resources · 1.6 MiB · 75 third-party 643.7 KiB over 1MB target
JavaScript 76% · 1.2 MiB
Font 11% · 175.8 KiB
Image 6% · 103.0 KiB
Document 4% · 68.6 KiB
CSS 2% · 35.1 KiB
Other 1% · 22.4 KiB
~109.4 KiB of savings available
Remove unused JavaScript: 109.4 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 215 resources | 1.6 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
AThird-Party Impact27% third-party, 0 ms blockingPASS
Third-Party Impact
27% third-party, 0 ms blocking
27% third-party, 0 ms blocking
Info::
Third-party code accounts for 27% of page weight (451.5 KiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
73%
27%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Image Optimization3 images, 0 KB saveablePASS
Image Optimization
3 images, 0 KB saveable
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 100 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+Font Loading5 fonts (176 KB)PASS
Font Loading
5 fonts (176 KB)
5 fonts (176 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
176 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
assistant_n4.9120912a46... woff2 swap
Size 13 KB
Load time 32 ms
Start 194 ms
Risk FOUT — text flashes from fallback to web font
playfairdisplay_n4.9980... woff2 swap
Size 23 KB
Load time 39 ms
Start 195 ms
Risk FOUT — text flashes from fallback to web font
assistant_n7.bf44452348... woff2 swap
Size 13 KB
Load time 30 ms
Start 604 ms
Risk FOUT — text flashes from fallback to web font
GTStandard-MSemibold.woff2 woff2 swap
Size 64 KB
Load time 52 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
GTStandard-MRegular.woff2 woff2 swap
Size 63 KB
Load time 55 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
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+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource Hints162 hints, 0 missing preconnectsPASS
Resource Hints
162 hints, 0 missing preconnects
162 hints, 0 missing preconnects
Info::
Page uses 162 resource hint(s)
Current Resource Hints
preconnect 2
preload 2
dns-prefetch 1
prefetch
+147
157162 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+Asset CompressionAll 1 asset host use brotliPASS
Asset Compression
All 1 asset host use brotli
All 1 asset host use brotli
Info::
cdn.shopify.com serves assets with brotli (assets: 4)
Got: cdn.shopify.com (text/javascript)
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server-Timing Observability1 Server-Timing entries advertisedPASS
Server-Timing Observability
1 Server-Timing entries advertised
1 Server-Timing entries advertised
Info::
Server-Timing header advertises 1 timing entries
AServer Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: br` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
A+JavaScript BlockingNo render-blocking JS or document.write usage detectedPASS
JavaScript Blocking
No render-blocking JS or document.write usage detected
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
CSS Performance Depth
1 CSS depth issue(s) detected
1 CSS depth issue(s) detected
Warning::
16 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall215 requests over 4806msINFO
Network Waterfall
215 requests over 4806ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
18% of JavaScript execution is third-party
First-party Third-party 511ms · 219KB · $3/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Facebook Pixel connect.facebook.net | Advertising | 261ms | 111 KB | 34% | $2/mo | Costly |
cdn.shopify.com cdn.shopify.com | Other | 135ms | 14 KB | — | $1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 114ms | 93 KB | 35% | $1/mo | Optional |
Facebook Pixel
Advertising
Execution 261ms
Transfer 111 KB
Unused 34%
Monthly Cost $2/mo
cdn.shopify.com
Other
Execution 135ms
Transfer 14 KB
Monthly Cost $1/mo
Facebook Pixel
Advertising
Execution 114ms
Transfer 93 KB
Unused 35%
Monthly Cost $1/mo
These scripts may cost more than they're worth
- Facebook Pixel adds 261ms and costs ~$2/month
Facebook Pixel takes 261ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Image Optimization3 images, 128 KB total, 0 KB wastedINFO
Image Optimization
3 images, 128 KB total, 0 KB wasted
Image Optimization Audit
Total Images
3
Total Size
128 KB
1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.