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https://www.chatfieldbraces.co.uk/orthodontics/invisalign-london/

Performance

· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
4
REVIEW
3
PASS
13
INFO
3

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

Mobile Desktop
86
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
77
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

953 ms

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

1.91 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

10 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.109

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

1.27 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.

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 s
Checks
23
13 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
98.3 MB transferred, 97 requests
FIX
98.3 MB transferred, 97 requests
Critical::
Page weighs 101.9 MB (98.3 MB transferred)
Warning::
Images are 96.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 96.5 MB
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
Fonts are 360 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 360 KB
Info::
97 HTTP requests
Info::
Estimated 20.6 g CO2 per page load
98.3 MB / 2.4 MB budget
98.3 MB transferred
97 requests
20.6 g CO2 per page load
Images 96.5 MiB 98%
JavaScript 1.3 MiB 1%
Fonts 360.4 KiB 0%
CSS 118.3 KiB 0%
HTML 48.5 KiB 0%
Other 2.4 KiB 0%
Other 556 B 0%
Other 556 B 0%
Other 472 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

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

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

F
JS Bundles
Action
23 scripts, 751 KB unused
FIX
23 scripts, 751 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/NhfdZHz...: 185 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/NhfdZHz...: 185 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/NhfdZHz...: 185 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-5V49...: 77 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-K75...: 67 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 751 KB
751 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.js0 KB185 KB (53%)✓3rd
https://www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.js350 KB185 KB (53%)✓3rd
https://www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.js351 KB185 KB (53%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-5V49XZQLQF&cx=c&_slc=1191 KB77 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-K75ST3W133 KB67 KB (51%)✓3rd
https://connect.facebook.net/en_US/fbevents.js112 KB51 KB (45%)✓3rd
https://www.chatfieldbraces.co.uk/assets/js/jquery.fancybox.min.js21 KB—✓1st
https://www.chatfieldbraces.co.uk/assets/js/jquery.min.js31 KB—✓1st
https://www.chatfieldbraces.co.uk/assets/js/nav-tabs.js14 KB—✗1st
https://www.chatfieldbraces.co.uk/assets/popup/script.js0 KB—✓1st

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

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

D
Page Weight Inventory
Action
97 resources · 98.3 MB · 751 KB savings available
FIX
97 resources · 98.3 MB · 751 KB savings available
Warning::
Page weight 98.3 MB exceeds 1 MB target by 97.3 MB
Got: 98.3 MB Expected: ≤ 1 MB
Info::
~751 KB of savings available
Info::
32 third-party resources (2% of weight)
Info::
9 resources over 200KB
97 resources · 98.3 MiB · 32 third-party 97.3 MiB over 1MB target
Image 98% · 96.5 MiB
JavaScript 1% · 1.3 MiB
Font 0% · 360.4 KiB
CSS 0% · 118.3 KiB
Document 0% · 48.5 KiB
Other 0% · 1.5 KiB

~750.9 KiB of savings available

Remove unused JavaScript: 750.9 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store, no-cache, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, no-cache, must-revalidate

DirectiveValueMeaning
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
B
Image Optimization
39 images, 0 KB saveable
REVIEW
39 images, 0 KB saveable
Warning::
https://www.chatfieldbraces.co.uk/assets/images/w-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/pl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/img/overb... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/bo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/ca... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/to... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/ou... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/img/open-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/bo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/bo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/to... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/bk... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/in... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/popup/ima... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/in... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/img/cross... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/ge... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/we... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/to... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/ri... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/in... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/pl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/in... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/img/under... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/be... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/popup/ima... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/pl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/img/crowd... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/img/gappe... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/ou... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/popup/ima... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.chatfieldbraces.co.uk/assets/images/ch... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
39 images 96.5 MB
0 oversized -0 KB
2 legacy format
32 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

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

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

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

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

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

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

C
JS Execution Cost
Action
1417ms total JS execution
REVIEW
1417ms total JS execution
Warning::
Unattributable: 678ms CPU time
Info::
https://www.chatfieldbraces.co.uk/orthodontics/inv...: 221ms CPU time
Info::
https://www.gstatic.com/recaptcha/releases/NhfdZHz...: 217ms CPU time
Info::
https://www.chatfieldbraces.co.uk/assets/js/jquery...: 124ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-5V49...: 74ms CPU time
Info::
Third-party scripts: 394ms (28% of total)

Main Thread Breakdown

Other 46% Script Evaluation 34% Style & Layout 9% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
Unattributable678ms31ms0ms1st
https://www.chatfieldbraces.co.uk/orthodontics/invisalign-london/221ms4ms3ms1st
https://www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.js217ms187ms17ms3rd
https://www.chatfieldbraces.co.uk/assets/js/jquery.min.js124ms88ms3ms1st
https://www.googletagmanager.com/gtag/js?id=G-5V49XZQLQF&cx=c&_slc=174ms62ms11ms3rd
https://connect.facebook.net/en_US/fbevents.js52ms38ms12ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-K75ST3W51ms41ms10ms3rd
B
Server-Timing Observability
No Server-Timing header found
REVIEW
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.
A+
Third-Party Impact
2% third-party, 0 ms blocking
PASS
2% third-party, 0 ms blocking
Info::
Third-party code accounts for 2% of page weight (1.6 MiB of 98.3 MiB)
Info::
Third-party blocking time is low (0 ms)
98%
First-party Third-party
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+
Font Loading
10 fonts (360 KB)
PASS
10 fonts (360 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

360 KB total

Render-blocking

0

of 10

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 953 ms LCP 1.9 shttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/webfonts/fa-solid-900.woff2 — 155.2 KiB — 88 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/webfonts/fa-brands-400.woff2 — 116.6 KiB — 88 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiEyp8kv8JHgFVrJJfecnFHGPc.woff2pxiEyp8kv8JHgFVrJJfecnF... https://fonts.gstatic.com/s/poppins/v24/pxiEyp8kv8JHgFVrJJfecnFHGPc.woff2 — 7.7 KiB — 39 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2pxiByp8kv8JHgFVrLCz7Z1x... https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2 — 7.7 KiB — 47 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLEj6Z1xlFd2JQEk.woff2pxiByp8kv8JHgFVrLEj6Z1x... https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLEj6Z1xlFd2JQEk.woff2 — 7.8 KiB — 65 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLGT9Z1xlFd2JQEk.woff2pxiByp8kv8JHgFVrLGT9Z1x... https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLGT9Z1xlFd2JQEk.woff2 — 7.6 KiB — 64 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLDD4Z1xlFd2JQEk.woff2pxiByp8kv8JHgFVrLDD4Z1x... https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLDD4Z1xlFd2JQEk.woff2 — 7.7 KiB — 80 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLDz8Z1xlFd2JQEk.woff2pxiByp8kv8JHgFVrLDz8Z1x... https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLDz8Z1xlFd2JQEk.woff2 — 7.7 KiB — 75 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiGyp8kv8JHgFVrJJLucHtAOvWDSA.woff2pxiGyp8kv8JHgFVrJJLucHt... https://fonts.gstatic.com/s/poppins/v24/pxiGyp8kv8JHgFVrJJLucHtAOvWDSA.woff2 — 8.5 KiB — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 111 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 155 KB
Load time 88 ms
Start 582 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-brands-400.woff2 woff2 swap
Size 117 KB
Load time 88 ms
Start 583 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
pxiEyp8kv8JHgFVrJJfecnF... woff2 swap
Size 8 KB
Load time 39 ms
Start 584 ms
Risk FOUT — text flashes from fallback to web font
pxiByp8kv8JHgFVrLCz7Z1x... woff2 swap
Size 8 KB
Load time 47 ms
Start 584 ms
Risk FOUT — text flashes from fallback to web font
pxiByp8kv8JHgFVrLEj6Z1x... woff2 swap
Size 8 KB
Load time 65 ms
Start 584 ms
Risk FOUT — text flashes from fallback to web font
pxiByp8kv8JHgFVrLGT9Z1x... woff2 swap
Size 8 KB
Load time 64 ms
Start 585 ms
Risk FOUT — text flashes from fallback to web font
pxiByp8kv8JHgFVrLDD4Z1x... woff2 swap
Size 8 KB
Load time 80 ms
Start 585 ms
Risk FOUT — text flashes from fallback to web font
pxiByp8kv8JHgFVrLDz8Z1x... woff2 swap
Size 8 KB
Load time 75 ms
Start 585 ms
Risk FOUT — text flashes from fallback to web font
pxiGyp8kv8JHgFVrJJLucHt... woff2 swap
Size 8 KB
Load time 77 ms
Start 585 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 111 ms
Start 1.4 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)

Fixing the unchecked items could save ~136 KB and ~272 ms

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+
Document Compression
Document response uses brotli
PASS
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 Compression
All 1 asset host use brotli
PASS
All 1 asset host use brotli
Info::
cdnjs.cloudflare.com serves assets with brotli (assets: 3)
Got: cdnjs.cloudflare.com (text/css)
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+
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store, no-cache, must-revalidate
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

Network Waterfall
97 requests over 5168ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 953 ms LCP 1.9 shttps://www.chatfieldbraces.co.uk/orthodontics/invisalign-london//orthodontics/invisalign-london/ https://www.chatfieldbraces.co.uk/orthodontics/invisalign-london/ — 200 — 20.6 KiB — 270 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/css/all.min.css — 200 — 22.5 KiB — 77 ms — h3https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swapfonts.googleapis.com/css2?family=Po... https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap — 200 — 1.4 KiB — 154 ms — h2https://www.chatfieldbraces.co.uk/assets/css/bootstrap.min.css/assets/css/bootstrap.min.css https://www.chatfieldbraces.co.uk/assets/css/bootstrap.min.css — 200 — 27.8 KiB — 72 ms — h2https://www.chatfieldbraces.co.uk/assets/css/jquery.fancybox.min.css/assets/css/jquery.fancybox.min.css https://www.chatfieldbraces.co.uk/assets/css/jquery.fancybox.min.css — 200 — 2.9 KiB — 132 ms — h2https://www.chatfieldbraces.co.uk/assets/css/owl.carousel.min.css/assets/css/owl.carousel.min.css https://www.chatfieldbraces.co.uk/assets/css/owl.carousel.min.css — 200 — 970 B — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/owl.theme.default.css/assets/css/owl.theme.default.css https://www.chatfieldbraces.co.uk/assets/css/owl.theme.default.css — 200 — 519 B — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/nav-tabs.css/assets/css/nav-tabs.css https://www.chatfieldbraces.co.uk/assets/css/nav-tabs.css — 200 — 594 B — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/scrollbar.css/assets/css/scrollbar.css https://www.chatfieldbraces.co.uk/assets/css/scrollbar.css — 200 — 3.8 KiB — 132 ms — h2https://www.chatfieldbraces.co.uk/assets/css/twentytwenty.css/assets/css/twentytwenty.css https://www.chatfieldbraces.co.uk/assets/css/twentytwenty.css — 200 — 925 B — 131 ms — h2https://www.chatfieldbraces.co.uk/assets/css/mobile-menu.css/assets/css/mobile-menu.css https://www.chatfieldbraces.co.uk/assets/css/mobile-menu.css — 200 — 955 B — 131 ms — h2https://www.chatfieldbraces.co.uk/assets/css/submenu.css/assets/css/submenu.css https://www.chatfieldbraces.co.uk/assets/css/submenu.css — 200 — 3.6 KiB — 132 ms — h2https://www.chatfieldbraces.co.uk/assets/css/slideInUp-nav.css/assets/css/slideInUp-nav.css https://www.chatfieldbraces.co.uk/assets/css/slideInUp-nav.css — 200 — 701 B — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/navbar.css?v=1.0/assets/css/navbar.css?v=1.0 https://www.chatfieldbraces.co.uk/assets/css/navbar.css?v=1.0 — 200 — 2.1 KiB — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/popup/style.css?v=8.0/assets/popup/style.css?v=8.0 https://www.chatfieldbraces.co.uk/assets/popup/style.css?v=8.0 — 200 — 2.4 KiB — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/style.css?v=12.2/assets/css/style.css?v=12.2 https://www.chatfieldbraces.co.uk/assets/css/style.css?v=12.2 — 200 — 8.8 KiB — 134 ms — h2https://www.chatfieldbraces.co.uk/assets/css/responsive.css?v=8.3/assets/css/responsive.css?v=8.3 https://www.chatfieldbraces.co.uk/assets/css/responsive.css?v=8.3 — 200 — 3.2 KiB — 134 ms — h2https://www.chatfieldbraces.co.uk/assets/images/chatfield-dental-braces-logo.webp/assets/images/chatfield-dental-bra... https://www.chatfieldbraces.co.uk/assets/images/chatfield-dental-braces-logo.webp — 200 — 7.4 KiB — 135 ms — h2https://www.chatfieldbraces.co.uk/assets/images/w-btn-arrow.webp/assets/images/w-btn-arrow.webp https://www.chatfieldbraces.co.uk/assets/images/w-btn-arrow.webp — 200 — 1.2 KiB — 135 ms — h2https://www.chatfieldbraces.co.uk/assets/images/top-phone-icon.webp/assets/images/top-phone-icon.webp https://www.chatfieldbraces.co.uk/assets/images/top-phone-icon.webp — 200 — 1.7 KiB — 68 ms — h2http://fontawesome.io/assets/font-awesome/css/font-awesome.cssfontawesome.io/assets/font-awesome/... http://fontawesome.io/assets/font-awesome/css/font-awesome.css — -1 — 0 B — 0 ms — https://fonts.googleapis.com/css?family=Lato:400,700fonts.googleapis.com/css?family=Lat... https://fonts.googleapis.com/css?family=Lato:400,700 — 200 — 516 B — 55 ms — h2https://www.chatfieldbraces.co.uk/assets/images/top-email-icon.webp/assets/images/top-email-icon.webp https://www.chatfieldbraces.co.uk/assets/images/top-email-icon.webp — 200 — 1.3 KiB — 66 ms — h2https://www.chatfieldbraces.co.uk/assets/images/top-clock-icon.webp/assets/images/top-clock-icon.webp https://www.chatfieldbraces.co.uk/assets/images/top-clock-icon.webp — 200 — 1.4 KiB — 78 ms — h2https://www.chatfieldbraces.co.uk/assets/js/jquery.min.js/assets/js/jquery.min.js https://www.chatfieldbraces.co.uk/assets/js/jquery.min.js — 200 — 31.2 KiB — 80 ms — h2https://www.chatfieldbraces.co.uk/assets/js/popper.min.js/assets/js/popper.min.js https://www.chatfieldbraces.co.uk/assets/js/popper.min.js — 200 — 6.5 KiB — 79 ms — h2https://www.chatfieldbraces.co.uk/assets/js/bootstrap.min.js/assets/js/bootstrap.min.js https://www.chatfieldbraces.co.uk/assets/js/bootstrap.min.js — 200 — 12.3 KiB — 80 ms — h2https://www.chatfieldbraces.co.uk/assets/js/bootstrap.bundle.min.js/assets/js/bootstrap.bundle.min.js https://www.chatfieldbraces.co.uk/assets/js/bootstrap.bundle.min.js — 200 — 22.4 KiB — 81 ms — h2https://www.chatfieldbraces.co.uk/assets/js/owl.carousel.min.js/assets/js/owl.carousel.min.js https://www.chatfieldbraces.co.uk/assets/js/owl.carousel.min.js — 200 — 10.9 KiB — 82 ms — h2https://www.chatfieldbraces.co.uk/assets/js/jquery.fancybox.min.js/assets/js/jquery.fancybox.min.js https://www.chatfieldbraces.co.uk/assets/js/jquery.fancybox.min.js — 200 — 20.6 KiB — 138 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 953 ms LCP 1.9 shttps://www.chatfieldbraces.co.uk/orthodontics/invisalign-london//orthodontics/invisalign-london/ https://www.chatfieldbraces.co.uk/orthodontics/invisalign-london/ — 200 — 20.6 KiB — 270 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/css/all.min.css — 200 — 22.5 KiB — 77 ms — h3https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swapfonts.googleapis.com/css2?family=Po... https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap — 200 — 1.4 KiB — 154 ms — h2https://www.chatfieldbraces.co.uk/assets/css/bootstrap.min.css/assets/css/bootstrap.min.css https://www.chatfieldbraces.co.uk/assets/css/bootstrap.min.css — 200 — 27.8 KiB — 72 ms — h2https://www.chatfieldbraces.co.uk/assets/css/jquery.fancybox.min.css/assets/css/jquery.fancybox.min.css https://www.chatfieldbraces.co.uk/assets/css/jquery.fancybox.min.css — 200 — 2.9 KiB — 132 ms — h2https://www.chatfieldbraces.co.uk/assets/css/owl.carousel.min.css/assets/css/owl.carousel.min.css https://www.chatfieldbraces.co.uk/assets/css/owl.carousel.min.css — 200 — 970 B — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/owl.theme.default.css/assets/css/owl.theme.default.css https://www.chatfieldbraces.co.uk/assets/css/owl.theme.default.css — 200 — 519 B — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/nav-tabs.css/assets/css/nav-tabs.css https://www.chatfieldbraces.co.uk/assets/css/nav-tabs.css — 200 — 594 B — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/scrollbar.css/assets/css/scrollbar.css https://www.chatfieldbraces.co.uk/assets/css/scrollbar.css — 200 — 3.8 KiB — 132 ms — h2https://www.chatfieldbraces.co.uk/assets/css/twentytwenty.css/assets/css/twentytwenty.css https://www.chatfieldbraces.co.uk/assets/css/twentytwenty.css — 200 — 925 B — 131 ms — h2https://www.chatfieldbraces.co.uk/assets/css/mobile-menu.css/assets/css/mobile-menu.css https://www.chatfieldbraces.co.uk/assets/css/mobile-menu.css — 200 — 955 B — 131 ms — h2https://www.chatfieldbraces.co.uk/assets/css/submenu.css/assets/css/submenu.css https://www.chatfieldbraces.co.uk/assets/css/submenu.css — 200 — 3.6 KiB — 132 ms — h2https://www.chatfieldbraces.co.uk/assets/css/slideInUp-nav.css/assets/css/slideInUp-nav.css https://www.chatfieldbraces.co.uk/assets/css/slideInUp-nav.css — 200 — 701 B — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/navbar.css?v=1.0/assets/css/navbar.css?v=1.0 https://www.chatfieldbraces.co.uk/assets/css/navbar.css?v=1.0 — 200 — 2.1 KiB — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/popup/style.css?v=8.0/assets/popup/style.css?v=8.0 https://www.chatfieldbraces.co.uk/assets/popup/style.css?v=8.0 — 200 — 2.4 KiB — 133 ms — h2https://www.chatfieldbraces.co.uk/assets/css/style.css?v=12.2/assets/css/style.css?v=12.2 https://www.chatfieldbraces.co.uk/assets/css/style.css?v=12.2 — 200 — 8.8 KiB — 134 ms — h2https://www.chatfieldbraces.co.uk/assets/css/responsive.css?v=8.3/assets/css/responsive.css?v=8.3 https://www.chatfieldbraces.co.uk/assets/css/responsive.css?v=8.3 — 200 — 3.2 KiB — 134 ms — h2https://www.chatfieldbraces.co.uk/assets/images/chatfield-dental-braces-logo.webp/assets/images/chatfield-dental-bra... https://www.chatfieldbraces.co.uk/assets/images/chatfield-dental-braces-logo.webp — 200 — 7.4 KiB — 135 ms — h2https://www.chatfieldbraces.co.uk/assets/images/w-btn-arrow.webp/assets/images/w-btn-arrow.webp https://www.chatfieldbraces.co.uk/assets/images/w-btn-arrow.webp — 200 — 1.2 KiB — 135 ms — h2https://www.chatfieldbraces.co.uk/assets/images/top-phone-icon.webp/assets/images/top-phone-icon.webp https://www.chatfieldbraces.co.uk/assets/images/top-phone-icon.webp — 200 — 1.7 KiB — 68 ms — h2http://fontawesome.io/assets/font-awesome/css/font-awesome.cssfontawesome.io/assets/font-awesome/... http://fontawesome.io/assets/font-awesome/css/font-awesome.css — -1 — 0 B — 0 ms — https://fonts.googleapis.com/css?family=Lato:400,700fonts.googleapis.com/css?family=Lat... https://fonts.googleapis.com/css?family=Lato:400,700 — 200 — 516 B — 55 ms — h2https://www.chatfieldbraces.co.uk/assets/images/top-email-icon.webp/assets/images/top-email-icon.webp https://www.chatfieldbraces.co.uk/assets/images/top-email-icon.webp — 200 — 1.3 KiB — 66 ms — h2https://www.chatfieldbraces.co.uk/assets/images/top-clock-icon.webp/assets/images/top-clock-icon.webp https://www.chatfieldbraces.co.uk/assets/images/top-clock-icon.webp — 200 — 1.4 KiB — 78 ms — h2https://www.chatfieldbraces.co.uk/assets/js/jquery.min.js/assets/js/jquery.min.js https://www.chatfieldbraces.co.uk/assets/js/jquery.min.js — 200 — 31.2 KiB — 80 ms — h2https://www.chatfieldbraces.co.uk/assets/js/popper.min.js/assets/js/popper.min.js https://www.chatfieldbraces.co.uk/assets/js/popper.min.js — 200 — 6.5 KiB — 79 ms — h2https://www.chatfieldbraces.co.uk/assets/js/bootstrap.min.js/assets/js/bootstrap.min.js https://www.chatfieldbraces.co.uk/assets/js/bootstrap.min.js — 200 — 12.3 KiB — 80 ms — h2https://www.chatfieldbraces.co.uk/assets/js/bootstrap.bundle.min.js/assets/js/bootstrap.bundle.min.js https://www.chatfieldbraces.co.uk/assets/js/bootstrap.bundle.min.js — 200 — 22.4 KiB — 81 ms — h2https://www.chatfieldbraces.co.uk/assets/js/owl.carousel.min.js/assets/js/owl.carousel.min.js https://www.chatfieldbraces.co.uk/assets/js/owl.carousel.min.js — 200 — 10.9 KiB — 82 ms — h2https://www.chatfieldbraces.co.uk/assets/js/jquery.fancybox.min.js/assets/js/jquery.fancybox.min.js https://www.chatfieldbraces.co.uk/assets/js/jquery.fancybox.min.js — 200 — 20.6 KiB — 138 ms — h2https://www.chatfieldbraces.co.uk/assets/js/scrollbar.js/assets/js/scrollbar.js https://www.chatfieldbraces.co.uk/assets/js/scrollbar.js — 200 — 12.1 KiB — 139 ms — h2https://www.chatfieldbraces.co.uk/assets/js/mobileMenu.js/assets/js/mobileMenu.js https://www.chatfieldbraces.co.uk/assets/js/mobileMenu.js — 200 — 1.4 KiB — 139 ms — h2https://www.chatfieldbraces.co.uk/assets/js/nav-tabs.js/assets/js/nav-tabs.js https://www.chatfieldbraces.co.uk/assets/js/nav-tabs.js — 200 — 14.4 KiB — 150 ms — h2https://www.chatfieldbraces.co.uk/assets/popup/script.js/assets/popup/script.js https://www.chatfieldbraces.co.uk/assets/popup/script.js — 200 — 320 B — 141 ms — h2https://cdnjs.cloudflare.com/ajax/libs/jquery.event.move/2.0.0/jquery.event.move.min.jscdnjs.cloudflare.com/ajax/libs/jque... https://cdnjs.cloudflare.com/ajax/libs/jquery.event.move/2.0.0/jquery.event.move.min.js — 200 — 2.2 KiB — 42 ms — h3https://www.chatfieldbraces.co.uk/assets/js/jquery.twentytwenty.js/assets/js/jquery.twentytwenty.js https://www.chatfieldbraces.co.uk/assets/js/jquery.twentytwenty.js — 200 — 1.1 KiB — 144 ms — h2https://www.google.com/recaptcha/api.js?render=6Ldde9sbAAAAAJdvyxqVKjNsuWLVDDUy-AqnSftxwww.google.com/recaptcha/api.js?ren... https://www.google.com/recaptcha/api.js?render=6Ldde9sbAAAAAJdvyxqVKjNsuWLVDDUy-AqnSftx — 200 — 1.0 KiB — 63 ms — h3https://www.chatfieldbraces.co.uk/assets/js/script-2.js/assets/js/script-2.js https://www.chatfieldbraces.co.uk/assets/js/script-2.js — 200 — 944 B — 142 ms — h2https://www.chatfieldbraces.co.uk/assets/images/right-arrow-icon.webp/assets/images/right-arrow-icon.web... https://www.chatfieldbraces.co.uk/assets/images/right-arrow-icon.webp — 200 — 1.2 KiB — 142 ms — h2https://www.chatfieldbraces.co.uk/assets/images/orthodontics-invisalign-london-banner.webp/assets/images/orthodontics-invisal... https://www.chatfieldbraces.co.uk/assets/images/orthodontics-invisalign-london-banner.webp — 200 — 159.0 KiB — 216 ms — h2https://www.chatfieldbraces.co.uk/assets/images/platinum-elite-invisalign-provider.webp/assets/images/platinum-elite-invis... https://www.chatfieldbraces.co.uk/assets/images/platinum-elite-invisalign-provider.webp — 200 — 20.5 KiB — 213 ms — h2https://www.chatfieldbraces.co.uk/assets/images/invisalign-in-london-youtube-video.webp/assets/images/invisalign-in-london... https://www.chatfieldbraces.co.uk/assets/images/invisalign-in-london-youtube-video.webp — 200 — 56.0 KiB — 266 ms — h2https://www.chatfieldbraces.co.uk/assets/images/play-youtube-button.webp/assets/images/play-youtube-button.... https://www.chatfieldbraces.co.uk/assets/images/play-youtube-button.webp — 200 — 2.3 KiB — 142 ms — h2https://www.chatfieldbraces.co.uk/assets/images/invisalign-in-uk.webp/assets/images/invisalign-in-uk.web... https://www.chatfieldbraces.co.uk/assets/images/invisalign-in-uk.webp — 200 — 66.4 KiB — 273 ms — h2https://www.chatfieldbraces.co.uk/assets/images/bkan-thumb.webp/assets/images/bkan-thumb.webp https://www.chatfieldbraces.co.uk/assets/images/bkan-thumb.webp — 200 — 72.5 KiB — 273 ms — h2https://www.chatfieldbraces.co.uk/assets/img/case1-before.webp/assets/img/case1-before.webp https://www.chatfieldbraces.co.uk/assets/img/case1-before.webp — 200 — 61.3 KiB — 273 ms — h2https://www.chatfieldbraces.co.uk/assets/img/case1-after.webp/assets/img/case1-after.webp https://www.chatfieldbraces.co.uk/assets/img/case1-after.webp — 200 — 39.6 KiB — 261 ms — h2https://www.chatfieldbraces.co.uk/assets/images/invisalign-treatment-in-london.webp/assets/images/invisalign-treatment... https://www.chatfieldbraces.co.uk/assets/images/invisalign-treatment-in-london.webp — 200 — 57.5 KiB — 274 ms — h2https://www.chatfieldbraces.co.uk/assets/img/overbite-img.webp/assets/img/overbite-img.webp https://www.chatfieldbraces.co.uk/assets/img/overbite-img.webp — 200 — 15.9 MiB — 4.5 s 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h2https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&ngs=1&ibt=1&tid=G-5V49XZQLQF&cid=1916157302.1793526698&gtm=45je6as1v876004800za20gxf1&rcb=4&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=115616985~115938466~115938469~118897920~118897930~120213116~120385422~120469145~120469153~121246026~121246034~123691370~123692835~123814184~123814945&z=113289946www.google.es/ads/ga-audiences?v=1&... https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&ngs=1&ibt=1&tid=G-5V49XZQLQF&cid=1916157302.1793526698&gtm=45je6as1v876004800za20gxf1&rcb=4&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=115616985~115938466~115938469~118897920~118897930~120213116~120385422~120469145~120469153~121246026~121246034~123691370~123692835~123814184~123814945&z=113289946 — 200 — 408 B — 143 ms — h2https://www.gstatic.com/recaptcha/api2/logo_48.pngwww.gstatic.com/recaptcha/api2/logo... https://www.gstatic.com/recaptcha/api2/logo_48.png — 200 — 2.2 KiB — 19 ms — h3https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v48/KFO7... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 33.9 KiB — 111 ms — h3https://www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.js — 200 — 0 B — 13 ms — h3https://www.chatfieldbraces.co.uk/assets/images/favicon.webp/assets/images/favicon.webp https://www.chatfieldbraces.co.uk/assets/images/favicon.webp — 200 — 2.4 KiB — 64 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
28% of JavaScript execution is third-party
First-party Third-party 394ms · 436KB · £4/mo
www.gstatic.com
Other
Costly
Execution 217ms
Transfer 0 KB
Unused 53%
Monthly Cost £2/mo
Google Tag Manager
Tag Manager
Optional
Execution 74ms
Transfer 191 KB
Unused 40%
Monthly Cost £1/mo
Facebook Pixel
Advertising
Optional
Execution 52ms
Transfer 112 KB
Unused 45%
Monthly Cost £1/mo
Google Tag Manager
Tag Manager
Optional
Execution 51ms
Transfer 133 KB
Unused 51%
Monthly Cost £1/mo

These scripts may cost more than they're worth

  • www.gstatic.com adds 217ms and costs ~£2/month

www.gstatic.com takes 217ms 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

53% of www.gstatic.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

51% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

Image Optimization
48 images, 99318 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

48

Total Size

99318 KB

48 missing dimensions 39 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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