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https://pictures.loowis.co.uk

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
4
REVIEW
3
PASS
12
INFO
3

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
75
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

526 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

11.45 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.

0.004

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

526 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.

11.45 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 s
Checks
22
12 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
24.5 MB transferred, 28 requests
FIX
24.5 MB transferred, 28 requests
Critical::
Page weighs 24.8 MB (24.5 MB transferred)
Warning::
Images are 24.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 24.2 MB
Info::
28 HTTP requests
Info::
Estimated 5.1 g CO2 per page load
24.5 MB / 2.4 MB budget
24.5 MB transferred
28 requests
5.1 g CO2 per page load
Images 24.2 MiB 99%
JavaScript 142.2 KiB 1%
Fonts 91.4 KiB 0%
CSS 12.9 KiB 0%
HTML 4.8 KiB 0%
Other 1.1 KiB 0%
Other 480 B 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

D
Third-Party Impact
Action
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (24.2 MiB of 24.5 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
D
Page Weight Inventory
Action
28 resources · 24.5 MB · 48 KB savings available
FIX
28 resources · 24.5 MB · 48 KB savings available
Warning::
Page weight 24.5 MB exceeds 1 MB target by 23.5 MB
Got: 24.5 MB Expected: ≤ 1 MB
Warning::
12 third-party resources (99% of weight)
Info::
11 resources over 200KB
28 resources · 24.5 MiB · 12 third-party 23.5 MiB over 1MB target
Image 99% · 24.2 MiB
JavaScript 1% · 142.2 KiB
Font 0% · 91.4 KiB
CSS 0% · 12.9 KiB
Document 0% · 4.8 KiB
Other 0% · 480 B

~48.1 KiB of savings available

Remove unused JavaScript: 48.1 KiB
F
HTTP Caching
Action
No cache headers
FIX
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.

B
Image Optimization
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Info::
All images are well-optimized
11 images 24.2 MB
0 oversized -0 KB
11 legacy format
0 missing dimensions CLS risk
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
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.
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
322ms total JS execution
PASS
322ms total JS execution
Info::
Unattributable: 128ms CPU time
Info::
https://pictures.loowis.co.uk/: 125ms CPU time
Info::
https://pictures.loowis.co.uk/assets/main-OiV9TYi3...: 70ms CPU time
Info::
Third-party scripts: 128ms (40% of total)

Main Thread Breakdown

Other 69% Script Evaluation 17% Style & Layout 10%
ScriptTotalScriptingParse/CompileParty
Unattributable128ms4ms0ms3rd
https://pictures.loowis.co.uk/125ms1ms1ms1st
https://pictures.loowis.co.uk/assets/main-OiV9TYi3.js70ms43ms0ms1st
A+
Font Loading
3 fonts (91 KB)
PASS
3 fonts (91 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

91 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 526 ms LCP 11.4 shttps://pictures.loowis.co.uk/assets/JosefinSans-Regular-RCRYFJDO-B30Hk5dU.ttfJosefinSans-Regular-RCR... https://pictures.loowis.co.uk/assets/JosefinSans-Regular-RCRYFJDO-B30Hk5dU.ttf — 30.6 KiB — 46 ms — font-display: swaphttps://pictures.loowis.co.uk/fonts/josefin/JosefinSans-Bold.ttfJosefinSans-Bold.ttf https://pictures.loowis.co.uk/fonts/josefin/JosefinSans-Bold.ttf — 29.5 KiB — 40 ms — font-display: swaphttps://pictures.loowis.co.uk/assets/JosefinSans-BoldItalic-34LMGPR4-DWQIWmZs.ttfJosefinSans-BoldItalic-... https://pictures.loowis.co.uk/assets/JosefinSans-BoldItalic-34LMGPR4-DWQIWmZs.ttf — 31.3 KiB — 46 ms — font-display: swap
JosefinSans-Regular-RCR... ttf swap
Size 31 KB
Load time 46 ms
Start 280 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
JosefinSans-Bold.ttf ttf swap
Size 30 KB
Load time 40 ms
Start 280 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
JosefinSans-BoldItalic-... ttf swap
Size 31 KB
Load time 46 ms
Start 280 ms
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 ~27 KB and ~54 ms

A+
JS Bundles
5 scripts, 48 KB unused
PASS
5 scripts, 48 KB unused
Warning::
https://pictures.loowis.co.uk/assets/main-OiV9TYi3...: 48 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 48 KB
48 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pictures.loowis.co.uk/assets/main-OiV9TYi3.js108 KB48 KB (45%)✓1st
https://pictures.loowis.co.uk/assets/index-BNEWwMGt.js1 KB—✓1st
https://pictures.loowis.co.uk/assets/Layout-lIz149sC.js20 KB—✓1st
https://pictures.loowis.co.uk/assets/ImageModal-Bgdk64Ob.js2 KB—✓1st
https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312451611 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

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
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+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
28 requests over 1067ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 526 ms LCP 11.4 shttps://pictures.loowis.co.uk// https://pictures.loowis.co.uk/ — 200 — 4.8 KiB — 178 ms — h3https://images.loowis.co.uk/6bbba91a-5a19-4a45-8e75-70b2a40d64e2images.loowis.co.uk/6bbba91a-5a19-4... https://images.loowis.co.uk/6bbba91a-5a19-4a45-8e75-70b2a40d64e2 — 200 — 4.8 MiB — 839 ms — h2https://images.loowis.co.uk/481ad75b-7f7e-46a9-8f68-32383b02f37bimages.loowis.co.uk/481ad75b-7f7e-4... https://images.loowis.co.uk/481ad75b-7f7e-46a9-8f68-32383b02f37b — 200 — 2.3 MiB — 604 ms — h2https://pictures.loowis.co.uk/assets/main-OiV9TYi3.js/assets/main-OiV9TYi3.js https://pictures.loowis.co.uk/assets/main-OiV9TYi3.js — 200 — 108.5 KiB — 126 ms — h3https://pictures.loowis.co.uk/assets/index-BNEWwMGt.js/assets/index-BNEWwMGt.js https://pictures.loowis.co.uk/assets/index-BNEWwMGt.js — 200 — 1.0 KiB — 66 ms — h3https://pictures.loowis.co.uk/assets/Layout-lIz149sC.js/assets/Layout-lIz149sC.js https://pictures.loowis.co.uk/assets/Layout-lIz149sC.js — 200 — 20.2 KiB — 100 ms — h3https://pictures.loowis.co.uk/assets/ImageModal-Bgdk64Ob.js/assets/ImageModal-Bgdk64Ob.js https://pictures.loowis.co.uk/assets/ImageModal-Bgdk64Ob.js — 200 — 1.8 KiB — 80 ms — h3https://pictures.loowis.co.uk/assets/globals-CF7pGsgk.css/assets/globals-CF7pGsgk.css https://pictures.loowis.co.uk/assets/globals-CF7pGsgk.css — 200 — 1.1 KiB — 35 ms — h3https://pictures.loowis.co.uk/assets/index-DThzd8SH.css/assets/index-DThzd8SH.css https://pictures.loowis.co.uk/assets/index-DThzd8SH.css — 200 — 1.7 KiB — 43 ms — h3https://pictures.loowis.co.uk/assets/leaflet-CIGW-MKW.css/assets/leaflet-CIGW-MKW.css https://pictures.loowis.co.uk/assets/leaflet-CIGW-MKW.css — 200 — 6.9 KiB — 60 ms — h3https://pictures.loowis.co.uk/assets/main-CbBAMDfs.css/assets/main-CbBAMDfs.css https://pictures.loowis.co.uk/assets/main-CbBAMDfs.css — 200 — 860 B — 64 ms — h3https://pictures.loowis.co.uk/assets/index-_IEdDtTo.css/assets/index-_IEdDtTo.css https://pictures.loowis.co.uk/assets/index-_IEdDtTo.css — 200 — 1004 B — 69 ms — h3https://pictures.loowis.co.uk/assets/ImageModal-Bjg7brg-.css/assets/ImageModal-Bjg7brg-.css https://pictures.loowis.co.uk/assets/ImageModal-Bjg7brg-.css — 200 — 1.3 KiB — 71 ms — h3https://images.loowis.co.uk/38f8fc5a-9cd6-4fd6-841a-48a7b0be971bimages.loowis.co.uk/38f8fc5a-9cd6-4... https://images.loowis.co.uk/38f8fc5a-9cd6-4fd6-841a-48a7b0be971b — 200 — 1.3 MiB — 473 ms — h2https://images.loowis.co.uk/cfc1d58e-c42e-437a-9035-1d6ab1ebf271images.loowis.co.uk/cfc1d58e-c42e-4... https://images.loowis.co.uk/cfc1d58e-c42e-437a-9035-1d6ab1ebf271 — 200 — 5.3 MiB — 555 ms — h2https://images.loowis.co.uk/7fbb3e73-b88d-4eab-99c4-fb415a14521cimages.loowis.co.uk/7fbb3e73-b88d-4... https://images.loowis.co.uk/7fbb3e73-b88d-4eab-99c4-fb415a14521c — 200 — 5.3 MiB — 739 ms — h2https://images.loowis.co.uk/2d6f96db-6923-4e2f-9d00-3b5ab9fca450images.loowis.co.uk/2d6f96db-6923-4... https://images.loowis.co.uk/2d6f96db-6923-4e2f-9d00-3b5ab9fca450 — 200 — 1.1 MiB — 685 ms — h2https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516 — 200 — 10.7 KiB — 63 ms — h2https://images.loowis.co.uk/01293f70-d6a7-4cc9-a504-5ccb3c6dd5f4images.loowis.co.uk/01293f70-d6a7-4... https://images.loowis.co.uk/01293f70-d6a7-4cc9-a504-5ccb3c6dd5f4 — 200 — 812.5 KiB — 321 ms — h2https://images.loowis.co.uk/6835d423-d0fa-4b88-87ef-6cf68cab7490images.loowis.co.uk/6835d423-d0fa-4... https://images.loowis.co.uk/6835d423-d0fa-4b88-87ef-6cf68cab7490 — 200 — 755.1 KiB — 308 ms — h2https://images.loowis.co.uk/a827d3e5-ab97-4c4a-939a-592ae993e625images.loowis.co.uk/a827d3e5-ab97-4... https://images.loowis.co.uk/a827d3e5-ab97-4c4a-939a-592ae993e625 — 200 — 665.3 KiB — 326 ms — h2https://images.loowis.co.uk/dcdad097-d42a-4487-b794-0d00efa46d82images.loowis.co.uk/dcdad097-d42a-4... https://images.loowis.co.uk/dcdad097-d42a-4487-b794-0d00efa46d82 — 200 — 580.2 KiB — 274 ms — h2https://images.loowis.co.uk/ddca0ca9-3aa7-4bf2-8361-2b13c9748602images.loowis.co.uk/ddca0ca9-3aa7-4... https://images.loowis.co.uk/ddca0ca9-3aa7-4bf2-8361-2b13c9748602 — 200 — 1.4 MiB — 365 ms — h2https://pictures.loowis.co.uk/assets/JosefinSans-Regular-RCRYFJDO-B30Hk5dU.ttf/assets/JosefinSans-Regular-RCRYFJD... https://pictures.loowis.co.uk/assets/JosefinSans-Regular-RCRYFJDO-B30Hk5dU.ttf — 200 — 30.6 KiB — 46 ms — h3https://pictures.loowis.co.uk/fonts/josefin/JosefinSans-Bold.ttf/fonts/josefin/JosefinSans-Bold.ttf https://pictures.loowis.co.uk/fonts/josefin/JosefinSans-Bold.ttf — 200 — 29.5 KiB — 40 ms — h3https://pictures.loowis.co.uk/assets/JosefinSans-BoldItalic-34LMGPR4-DWQIWmZs.ttf/assets/JosefinSans-BoldItalic-34LM... https://pictures.loowis.co.uk/assets/JosefinSans-BoldItalic-34LMGPR4-DWQIWmZs.ttf — 200 — 31.3 KiB — 46 ms — h3https://pictures.loowis.co.uk/cdn-cgi/rum?/cdn-cgi/rum? https://pictures.loowis.co.uk/cdn-cgi/rum? — 204 — 480 B — 36 ms — h3https://pictures.loowis.co.uk/favicon/favicon.png/favicon/favicon.png https://pictures.loowis.co.uk/favicon/favicon.png — 200 — 1.1 KiB — 30 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
40% of JavaScript execution is third-party
First-party Third-party 128ms · 0KB · £1/mo
Unattributable
Other
Optional
Execution 128ms
Transfer 0 KB
Monthly Cost £1/mo

How third-party costs are calculated

Image Optimization
22 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

22

Total Size

0 KB

Oversized

10

22 missing alt text 21 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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