https://www.duckydecor.co.uk
Performance
· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
86
GRADE
B
FIX
2
REVIEW
6
PASS
15
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
67
90
100
85
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.09 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
14.26 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 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.
4.71 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.
15.23 s
Page Load Progression
Checks
2615 PASS 6 REVIEW 2 FIX
FPage Weight BudgetAction4.6 MB transferred, 38 requestsFIX
Page Weight Budget
Action4.6 MB transferred, 38 requests
4.6 MB transferred, 38 requests
Critical::
Page weighs 5.0 MB (4.6 MB transferred)
Warning::
Images are 4.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.0 MB
Info::
CSS is 266 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 266 KB
Info::
Fonts are 224 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 224 KB
Info::
38 HTTP requests
Info::
Estimated 0.96 g CO2 per page load
4.6 MB transferred
38 requests
0.96 g CO2 per page load
Images 4.0 MiB 87%
CSS 266.5 KiB 6%
Fonts 223.9 KiB 5%
JavaScript 44.9 KiB 1%
HTML 42.3 KiB 1%
Other 15.0 KiB 0%
Other 2.3 KiB 0%
0 2.4 MB 4.9 MB
Over budget
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Why this matters
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Why this matters
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
Subset fonts to include only used characters, or switch to system font stacks.
Why this matters
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
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.
CImage OptimizationAction16 images, 0 KB saveableREVIEW
Image Optimization
Action16 images, 0 KB saveable
16 images, 0 KB saveable
Warning::
https://www.duckydecor.co.uk/wp-content/uploads/go... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.duckydecor.co.uk/wp-content/uploads/go... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.duckydecor.co.uk/wp-content/uploads/go... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.duckydecor.co.uk/wp-content/uploads/go... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.duckydecor.co.uk/wp-content/uploads/go... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
16 images 4.0 MB
0 oversized -0 KB
16 legacy format
5 missing dimensions CLS risk
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BJS Execution Cost637ms total JS executionREVIEW
JS Execution Cost
637ms total JS execution
637ms total JS execution
Warning::
https://www.duckydecor.co.uk/: 332ms CPU time
Warning::
Unattributable: 305ms CPU time
Main Thread Breakdown
Other 44% Style & Layout 23% Script Evaluation 14% Parse HTML & CSS 9% Rendering 5% Script Parsing & Compilation 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.duckydecor.co.uk/ | 332ms | 26ms | 11ms | 1st |
| Unattributable | 305ms | 7ms | 0ms | 1st |
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
HTTP/3 (QUIC)
HTTP/3 not advertised
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
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.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
CPage Weight InventoryAction38 resources · 4.6 MB · 0 KB savings availableREVIEW
Page Weight Inventory
Action38 resources · 4.6 MB · 0 KB savings available
38 resources · 4.6 MB · 0 KB savings available
Warning::
Page weight 4.6 MB exceeds 1 MB target by 3.6 MB
Got: 4.6 MB Expected: ≤ 1 MB
Info::
1 third-party resources (-0% of weight)
Info::
7 resources over 200KB
38 resources · 4.6 MiB · 1 third-party 3.6 MiB over 1MB target
Image 88% · 4.0 MiB
CSS 6% · 266.5 KiB
Font 5% · 223.9 KiB
JavaScript 1% · 44.9 KiB
Document 1% · 44.6 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 38 resources | 4.6 MiB | ||||||
A+Third-Party Impact-0% third-party, 0 ms blockingPASS
Third-Party Impact
-0% third-party, 0 ms blocking
-0% third-party, 0 ms blocking
Info::
Third-party code accounts for -0% of page weight (-1 B of 4.6 MiB)
Info::
Third-party blocking time is low (0 ms)
No third-party resources detected — all resources are first-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+Font Loading6 fonts (224 KB)PASS
Font Loading
6 fonts (224 KB)
6 fonts (224 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
224 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
PlayfairDisplay-latin_l... woff swap
Size 37 KB
Load time 44 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
PlayfairDisplay-latin_l... woff swap
Size 40 KB
Load time 888 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
Raleway-latin_latin-ext... woff swap
Size 41 KB
Load time 1.1 s
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
PlayfairDisplay-latin_l... woff swap
Size 39 KB
Load time 1.3 s
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
Raleway-latin_latin-ext... woff swap
Size 42 KB
Load time 81 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
OpenSans-latin_latin-ex... woff swap
Size 24 KB
Load time 115 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
- 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 ~67 KB and ~134 ms
A+JS Bundles10 scripts, 0 KB unusedPASS
JS Bundles
10 scripts, 0 KB unused
10 scripts, 0 KB unused
0 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.duckydecor.co.uk/wp-content/plugins/gutenberg/build/scripts/hooks/index.min.js?ver=7496969728ca0f95732d | 5 KB | — | ✓ | 1st |
| https://www.duckydecor.co.uk/wp-content/plugins/gutenberg/build/scripts/i18n/index.min.js?ver=125448662852c5e18937 | 6 KB | — | ✓ | 1st |
| https://www.duckydecor.co.uk/wp-content/plugins/go-x-post-editor/build/index-fe.js?ver=a97418810f010c7a2786 | 3 KB | — | ✓ | 1st |
| https://www.duckydecor.co.uk/wp-content/plugins/go-x-blocks/js/accessNavigationList/accessNavigationList.js?ver=1.0.6%2B4789269497 | 1 KB | — | ✓ | 1st |
| https://www.duckydecor.co.uk/wp-content/plugins/go-x-blocks/js/consent/consent.js?ver=1.0.6%2B4789269497 | 4 KB | — | ✓ | 1st |
| https://www.duckydecor.co.uk/wp-content/plugins/go-x-blocks/js/downloadWarning/downloadWarning.js?ver=1.0.6%2B4789269497 | 1 KB | — | ✓ | 1st |
| https://www.duckydecor.co.uk/wp-content/plugins/go-x-blocks/js/customLightbox/customLightbox.js?ver=1.0.6%2B4789269497 | 17 KB | — | ✓ | 1st |
| https://www.duckydecor.co.uk/wp-content/plugins/go-x-blocks/js/forms/forms.js?ver=1.0.6%2B4789269497 | 4 KB | — | ✓ | 1st |
| blob:https://www.duckydecor.co.uk/875581f4-fbbb-4fa0-9d58-3065e06af38d | -0 KB | — | ✓ | 3rd |
| https://www.duckydecor.co.uk/wp-includes/js/wp-emoji-release.min.js?ver=7.1.3 | 4 KB | — | ✓ | 1st |
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+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+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 Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: accept-encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
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::
78 `@font-face` rule(s) without `font-display` -- causes FOIT
An `@font-face` rule without `font-display` causes Flash of Invisible Text (FOIT): the browser hides the styled text for up to 3 seconds while the custom font downloads, then either swaps to fallback (Chrome / Firefox) or stays invisible (older Safari). Add `font-display: swap` (shows fallback immediately, swaps in the custom font when ready) or `font-display: optional` (uses fallback if the font isn't ready in 100ms; never causes visible swap). Either eliminates FOIT outright.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: IONOS SE
Asset CompressionNo text asset hosts to measureINFO
Asset Compression
No text asset hosts to measure
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall38 requests over 3158msINFO
Network Waterfall
38 requests over 3158ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization13 images, 827 KB total, 0 KB wastedINFO
Image Optimization
13 images, 827 KB total, 0 KB wasted
Image Optimization Audit
Total Images
13
Total Size
827 KB
12 missing alt text 13 missing dimensions 12 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.