https://dilussoclothing.com
Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
90
GRADE
A
FIX
1
REVIEW
6
PASS
13
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
98
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.
576 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.02 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
22 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.010
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
964 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.
2.48 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
2313 PASS 6 REVIEW 1 FIX
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 BudgetAction1.9 MB transferred, 261 requestsREVIEW
Page Weight Budget
Action1.9 MB transferred, 261 requests
1.9 MB transferred, 261 requests
Info::
Page weighs 2.6 MB (1.9 MB transferred)
Warning::
JavaScript is 563 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 563 KB
Warning::
261 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.40 g CO2 per page load
1.9 MB transferred
261 requests
0.40 g CO2 per page load
Other 892.6 KiB 46%
JavaScript 562.6 KiB 29%
Images 190.1 KiB 10%
Fonts 175.8 KiB 9%
HTML 63.4 KiB 3%
CSS 35.2 KiB 2%
Other 12.4 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 Execution Cost820ms total JS executionREVIEW
JS Execution Cost
820ms total JS execution
820ms total JS execution
Warning::
Unattributable: 287ms CPU time
Info::
https://dilussoclothing.com/: 216ms CPU time
Info::
https://dilussoclothing.com/cdn/wpm/b9f5e2762wb720...: 128ms CPU time
Info::
https://connect.facebook.net/en_US/fbevents.js: 67ms CPU time
Info::
https://connect.facebook.net/signals/config/130333...: 62ms CPU time
Info::
Third-party scripts: 128ms (16% of total)
Main Thread Breakdown
Script Evaluation 48% Other 35% Style & Layout 7% Script Parsing & Compilation 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 287ms | 23ms | 0ms | 1st |
| https://dilussoclothing.com/ | 216ms | 41ms | 7ms | 1st |
| https://dilussoclothing.com/cdn/wpm/b9f5e2762wb720532ap19708c42m93b2bec3m.js | 128ms | 96ms | 5ms | 1st |
| https://connect.facebook.net/en_US/fbevents.js | 67ms | 51ms | 11ms | 3rd |
| https://connect.facebook.net/signals/config/1303334274408561?v=2.9.419&r=stable&domain=dilussoclothing.com&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 | 62ms | 54ms | 8ms | 3rd |
| https://dilussoclothing.com/cdn/s/trekkie.storefront.32ff6085714fe9c4d5859e332c5de5f8759a859e.min.js | 61ms | 55ms | 3ms | 1st |
BJS Bundles197 scripts, 110 KB unusedREVIEW
JS Bundles
197 scripts, 110 KB unused
197 scripts, 110 KB unused
Warning::
https://connect.facebook.net/en_US/fbevents.js: 39 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
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/signals/config/130333...: 32 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 110 KB
110 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://connect.facebook.net/en_US/fbevents.js | 111 KB | 39 KB (35%) | ✓ | 3rd |
| https://dilussoclothing.com/cdn/wpm/b9f5e2762wb720532ap19708c42m93b2bec3m.js | 83 KB | 39 KB (47%) | ✓ | 1st |
| https://connect.facebook.net/signals/config/1303334274408561?v=2.9.419&r=stable&domain=dilussoclothing.com&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 InventoryAction261 resources · 1.9 MB · 110 KB savings availableREVIEW
Page Weight Inventory
Action261 resources · 1.9 MB · 110 KB savings available
261 resources · 1.9 MB · 110 KB savings available
Warning::
Page weight 1.9 MB exceeds 1 MB target by 915 KB
Got: 1.9 MB Expected: ≤ 1 MB
Info::
~110 KB of savings available
Info::
78 third-party resources (23% of weight)
261 resources · 1.9 MiB · 78 third-party 914.9 KiB over 1MB target
JavaScript 75% · 1.4 MiB
Image 10% · 192.6 KiB
Font 9% · 175.8 KiB
Document 4% · 68.6 KiB
CSS 2% · 35.2 KiB
Other 1% · 19.1 KiB
~110.3 KiB of savings available
Remove unused JavaScript: 110.3 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 261 resources | 1.9 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 Impact23% third-party, 0 ms blockingPASS
Third-Party Impact
23% third-party, 0 ms blocking
23% third-party, 0 ms blocking
Info::
Third-party code accounts for 23% of page weight (453.5 KiB of 1.9 MiB)
Info::
Third-party blocking time is low (0 ms)
77%
23%
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 190 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 65 ms
Start 213 ms
Risk FOUT — text flashes from fallback to web font
playfairdisplay_n4.9980... woff2 swap
Size 23 KB
Load time 50 ms
Start 213 ms
Risk FOUT — text flashes from fallback to web font
assistant_n7.bf44452348... woff2 swap
Size 13 KB
Load time 44 ms
Start 424 ms
Risk FOUT — text flashes from fallback to web font
GTStandard-MSemibold.woff2 woff2 swap
Size 64 KB
Load time 47 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
GTStandard-MRegular.woff2 woff2 swap
Size 63 KB
Load time 47 ms
Start 1.0 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 HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
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.
Network Waterfall261 requests over 5243msINFO
Network Waterfall
261 requests over 5243ms
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
16% of JavaScript execution is third-party
First-party Third-party 128ms · 204KB · $1/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Facebook Pixel connect.facebook.net | Advertising | 67ms | 111 KB | 35% | $0/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 62ms | 93 KB | 35% | $0/mo | Optional |
Facebook Pixel
Advertising
Execution 67ms
Transfer 111 KB
Unused 35%
Monthly Cost $0/mo
Facebook Pixel
Advertising
Execution 62ms
Transfer 93 KB
Unused 35%
Monthly Cost $0/mo
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.