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https://foodnetwork.co.uk

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
50
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
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.

3.01 s

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

7.07 s

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

773 ms

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

0.019

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

4.56 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.

11.66 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
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
3.2 MB transferred, 78 requests
FIX
3.2 MB transferred, 78 requests
Warning::
Page weighs 9.2 MB (3.2 MB transferred)
Warning::
Images are 1.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.7 MB
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
78 HTTP requests
Info::
Estimated 0.67 g CO2 per page load
3.2 MB / 2.4 MB budget
3.2 MB transferred
78 requests
0.67 g CO2 per page load
Images 1.7 MiB 52%
JavaScript 1.2 MiB 37%
Other 226.4 KiB 7%
HTML 71.8 KiB 2%
CSS 46.7 KiB 1%
Fonts 14.8 KiB 0%
Other 4.9 KiB 0%
Other 0 B 0%
Other 0 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

D
Third-Party Impact
Action
80% third-party, 0 ms blocking
FIX
80% third-party, 0 ms blocking
Warning::
Third-party code accounts for 80% of page weight (2.6 MiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
20%
80%
First-party Third-party
F
JS Execution Cost
Action
4476ms total JS execution
FIX
4476ms total JS execution
Warning::
https://foodnetwork.co.uk/: 1466ms CPU time
Warning::
Unattributable: 1072ms CPU time
Warning::
https://foodnetwork.co.uk/build/assets/app-BJFf2AC...: 805ms CPU time
Warning::
https://s.ntv.io/serve/load.js: 364ms CPU time
Warning::
https://cdn.cookielaw.org/scripttemplates/202601.2...: 360ms CPU time
Info::
Third-party scripts: 2122ms (47% of total)

Main Thread Breakdown

Script Evaluation 41% Other 26% Style & Layout 16% Rendering 7% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://foodnetwork.co.uk/1466ms163ms8ms1st
Unattributable1072ms379ms0ms3rd
https://foodnetwork.co.uk/build/assets/app-BJFf2ACq.js805ms539ms4ms1st
https://s.ntv.io/serve/load.js364ms262ms88ms3rd
https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js360ms179ms39ms3rd
https://8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app/e7d4aac7-7c82-4bb4-a499-57dccccec460-web.js208ms138ms62ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHCQZ5T118ms80ms37ms3rd
https://foodnetwork.co.uk/static-js/prebid7.12.0.js83ms54ms22ms1st
F
JS Bundles
Action
15 scripts, 656 KB unused
FIX
15 scripts, 656 KB unused
Warning::
https://s.ntv.io/serve/load.js: 190 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://foodnetwork.co.uk/build/assets/app-BJFf2AC...: 158 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://foodnetwork.co.uk/static-js/prebid7.12.0.j...: 80 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WHC...: 71 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202601.2...: 62 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 656 KB
656 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://s.ntv.io/serve/load.js251 KB190 KB (76%)✓3rd
https://foodnetwork.co.uk/build/assets/app-BJFf2ACq.js310 KB158 KB (51%)✓1st
https://foodnetwork.co.uk/static-js/prebid7.12.0.js100 KB80 KB (80%)✓1st
https://www.googletagmanager.com/gtm.js?id=GTM-WHCQZ5T126 KB71 KB (56%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js128 KB62 KB (48%)✓3rd
https://cdn.whisk.com/sdk/shopping-list.js64 KB58 KB (91%)✓3rd
https://8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app/e7d4aac7-7c82-4bb4-a499-57dccccec460-web.js190 KB37 KB (19%)✓3rd
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js9 KB—✓3rd
https://foodnetwork.co.uk/build/assets/Home-BmOHrub0.js2 KB—✓1st
https://foodnetwork.co.uk/build/assets/Default-BJvL1A7B.js1 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

F
Page Weight Inventory
Action
78 resources · 3.2 MB · 656 KB savings available
FIX
78 resources · 3.2 MB · 656 KB savings available
Warning::
Page weight 2.2 MB over 1MB target
Got: 3.2 MB Expected: ≤ 1 MB
Info::
~656 KB of savings available
Warning::
47 third-party resources (80% of weight)
Info::
2 resources over 200KB
78 resources · 3.2 MiB · 47 third-party 2.2 MiB over 1MB target
Image 52% · 1.7 MiB
JavaScript 37% · 1.2 MiB
Other 7% · 226.0 KiB
Document 2% · 71.9 KiB
CSS 2% · 51.5 KiB
Font 0% · 14.8 KiB

~656.2 KiB of savings available

Remove unused JavaScript: 656.2 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
37 images, 0 KB saveable
REVIEW
37 images, 0 KB saveable
Info::
All images are well-optimized
37 images 1.7 MB
0 oversized -0 KB
18 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
7 fonts (15 KB)
PASS
7 fonts (15 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

15 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.0 s LCP 7.1 shttps://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2gilroy-ultralight-webfo... https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2 — 119 B — 44 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2gilroy-light-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2 — 119 B — 27 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2gilroy-regular-webfont.... https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2 — 119 B — 41 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2gilroy-medium-webfont.w... https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2 — 146 B — 41 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2gilroy-semibold-webfont... https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2 — 112 B — 41 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2gilroy-bold-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2 — 354 B — 14 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/FoodNetwork.woff2FoodNetwork.woff2 https://foodnetwork.co.uk/fonts/FoodNetwork.woff2 — 13.8 KiB — 3 ms — font-display: swap
gilroy-ultralight-webfo... woff2 swap
Size 0 KB
Load time 44 ms
Start 28 ms
Risk FOUT — text flashes from fallback to web font
gilroy-light-webfont.woff2 woff2 swap
Size 0 KB
Load time 27 ms
Start 29 ms
Risk FOUT — text flashes from fallback to web font
gilroy-regular-webfont.... woff2 swap
Size 0 KB
Load time 41 ms
Start 29 ms
Risk FOUT — text flashes from fallback to web font
gilroy-medium-webfont.w... woff2 swap
Size 0 KB
Load time 41 ms
Start 29 ms
Risk FOUT — text flashes from fallback to web font
gilroy-semibold-webfont... woff2 swap
Size 0 KB
Load time 41 ms
Start 29 ms
Risk FOUT — text flashes from fallback to web font
gilroy-bold-webfont.woff2 woff2 swap
Size 0 KB
Load time 14 ms
Start 29 ms
Risk FOUT — text flashes from fallback to web font
FoodNetwork.woff2 woff2 swap
Size 14 KB
Load time 3 ms
Start 114 ms
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 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
9 hints, 0 missing preconnects
PASS
9 hints, 0 missing preconnects
Info::
Page uses 9 resource hint(s)

Current Resource Hints

preconnect
—
preload
9
dns-prefetch
—
prefetch
—

9 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
78 requests over 2829ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.0 s LCP 7.1 shttps://foodnetwork.co.uk// https://foodnetwork.co.uk/ — 200 — 71.8 KiB — 9 ms — h2https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2/fonts/gilroy-ultralight-webfont.wo... https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2 — 404 — 119 B — 44 ms — h2https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2/fonts/gilroy-light-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2 — 404 — 119 B — 27 ms — h2https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2/fonts/gilroy-regular-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2 — 404 — 119 B — 41 ms — h2https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2/fonts/gilroy-medium-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2 — 404 — 146 B — 41 ms — h2https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2/fonts/gilroy-semibold-webfont.woff... https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2 — 404 — 112 B — 41 ms — h2https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2/fonts/gilroy-bold-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2 — 404 — 354 B — 14 ms — h2https://foodnetwork.co.uk/build/assets/app-CjuUoRWY.css/build/assets/app-CjuUoRWY.css https://foodnetwork.co.uk/build/assets/app-CjuUoRWY.css — 200 — 39.6 KiB — 36 ms — h2https://foodnetwork.co.uk/build/assets/app-CIP97hy0.css/build/assets/app-CIP97hy0.css https://foodnetwork.co.uk/build/assets/app-CIP97hy0.css — 200 — 6.8 KiB — 11 ms — h2https://foodnetwork.co.uk/build/assets/app-BJFf2ACq.js/build/assets/app-BJFf2ACq.js https://foodnetwork.co.uk/build/assets/app-BJFf2ACq.js — 200 — 309.8 KiB — 53 ms — h2https://foodnetwork.co.uk/images/play-icon.svg/images/play-icon.svg https://foodnetwork.co.uk/images/play-icon.svg — 200 — 450 B — 29 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/27547/responsive-images/Grilled-Lamb-Chops___default_850_638.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/27547/responsive-images/Grilled-Lamb-Chops___default_850_638.webp — 200 — 198.2 KiB — 136 ms — h2https://foodnetwork.co.uk/static-js/prebid7.12.0.js/static-js/prebid7.12.0.js https://foodnetwork.co.uk/static-js/prebid7.12.0.js — 200 — 99.6 KiB — 39 ms — h2https://cdn.tagdeliver.com/cipt/17137.jscdn.tagdeliver.com/cipt/17137.js https://cdn.tagdeliver.com/cipt/17137.js — 200 — 20.8 KiB — 188 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 119 ms — h2https://cdn.whisk.com/sdk/shopping-list.jscdn.whisk.com/sdk/shopping-list.js https://cdn.whisk.com/sdk/shopping-list.js — 200 — 64.3 KiB — 138 ms — h3https://s.ntv.io/serve/load.jss.ntv.io/serve/load.js https://s.ntv.io/serve/load.js — 200 — 251.0 KiB — 123 ms — http/1.1https://foodnetwork.co.uk/images/logo26.png/images/logo26.png https://foodnetwork.co.uk/images/logo26.png — 200 — 8.1 KiB — 25 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/27197/responsive-images/284462_AdamRichamnEatsItaly_S001_8___default_850_638.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/27197/responsive-images/284462_AdamRichamnEatsItaly_S001_8___default_850_638.webp — 200 — 81.9 KiB — 46 ms — h2https://foodnetwork.co.uk/images/disco+logo.png/images/disco+logo.png https://foodnetwork.co.uk/images/disco+logo.png — 200 — 1.9 KiB — 19 ms — h2https://foodnetwork.co.uk/images/fallback-landscape.webp/images/fallback-landscape.webp https://foodnetwork.co.uk/images/fallback-landscape.webp — 200 — 59.1 KiB — 62 ms — h2https://foodnetwork.co.uk/images/illustrations/top-orange.svg/images/illustrations/top-orange.sv... https://foodnetwork.co.uk/images/illustrations/top-orange.svg — 200 — 9.1 KiB — 49 ms — h2https://foodnetwork.co.uk/images/illustrations/leaf.svg/images/illustrations/leaf.svg https://foodnetwork.co.uk/images/illustrations/leaf.svg — 200 — 7.2 KiB — 27 ms — h2https://foodnetwork.co.uk/images/illustrations/orange-v2.svg/images/illustrations/orange-v2.svg https://foodnetwork.co.uk/images/illustrations/orange-v2.svg — 200 — 10.8 KiB — 27 ms — h2https://foodnetwork.co.uk/images/logo-white.png/images/logo-white.png https://foodnetwork.co.uk/images/logo-white.png — 200 — 3.6 KiB — 24 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-WHCQZ5Twww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-WHCQZ5T — 200 — 126.4 KiB — 146 ms — h2https://8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app/e7d4aac7-7c82-4bb4-a499-57dccccec460-web.js8512b548-2306-4976-a576-a880f2c35e4... https://8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app/e7d4aac7-7c82-4bb4-a499-57dccccec460-web.js — 200 — 189.6 KiB — 155 ms — h2https://foodnetwork.co.uk/fonts/FoodNetwork.woff2/fonts/FoodNetwork.woff2 https://foodnetwork.co.uk/fonts/FoodNetwork.woff2 — 200 — 13.8 KiB — 3 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/27633/responsive-images/Grilled-Tuna-Steaks___portrait_572_858.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/27633/responsive-images/Grilled-Tuna-Steaks___portrait_572_858.webp — 200 — 84.4 KiB — 72 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/27631/responsive-images/tuna-rolls___portrait_572_858.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/27631/responsive-images/tuna-rolls___portrait_572_858.webp — 200 — 44.9 KiB — 74 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.0 s LCP 7.1 shttps://foodnetwork.co.uk// https://foodnetwork.co.uk/ — 200 — 71.8 KiB — 9 ms — h2https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2/fonts/gilroy-ultralight-webfont.wo... https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2 — 404 — 119 B — 44 ms — h2https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2/fonts/gilroy-light-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2 — 404 — 119 B — 27 ms — h2https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2/fonts/gilroy-regular-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2 — 404 — 119 B — 41 ms — h2https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2/fonts/gilroy-medium-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2 — 404 — 146 B — 41 ms — h2https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2/fonts/gilroy-semibold-webfont.woff... https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2 — 404 — 112 B — 41 ms — h2https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2/fonts/gilroy-bold-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2 — 404 — 354 B — 14 ms — h2https://foodnetwork.co.uk/build/assets/app-CjuUoRWY.css/build/assets/app-CjuUoRWY.css https://foodnetwork.co.uk/build/assets/app-CjuUoRWY.css — 200 — 39.6 KiB — 36 ms — h2https://foodnetwork.co.uk/build/assets/app-CIP97hy0.css/build/assets/app-CIP97hy0.css https://foodnetwork.co.uk/build/assets/app-CIP97hy0.css — 200 — 6.8 KiB — 11 ms — h2https://foodnetwork.co.uk/build/assets/app-BJFf2ACq.js/build/assets/app-BJFf2ACq.js https://foodnetwork.co.uk/build/assets/app-BJFf2ACq.js — 200 — 309.8 KiB — 53 ms — h2https://foodnetwork.co.uk/images/play-icon.svg/images/play-icon.svg https://foodnetwork.co.uk/images/play-icon.svg — 200 — 450 B — 29 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/27547/responsive-images/Grilled-Lamb-Chops___default_850_638.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/27547/responsive-images/Grilled-Lamb-Chops___default_850_638.webp — 200 — 198.2 KiB — 136 ms — h2https://foodnetwork.co.uk/static-js/prebid7.12.0.js/static-js/prebid7.12.0.js https://foodnetwork.co.uk/static-js/prebid7.12.0.js — 200 — 99.6 KiB — 39 ms — h2https://cdn.tagdeliver.com/cipt/17137.jscdn.tagdeliver.com/cipt/17137.js https://cdn.tagdeliver.com/cipt/17137.js — 200 — 20.8 KiB — 188 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 119 ms — h2https://cdn.whisk.com/sdk/shopping-list.jscdn.whisk.com/sdk/shopping-list.js https://cdn.whisk.com/sdk/shopping-list.js — 200 — 64.3 KiB — 138 ms — h3https://s.ntv.io/serve/load.jss.ntv.io/serve/load.js https://s.ntv.io/serve/load.js — 200 — 251.0 KiB — 123 ms — http/1.1https://foodnetwork.co.uk/images/logo26.png/images/logo26.png https://foodnetwork.co.uk/images/logo26.png — 200 — 8.1 KiB — 25 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/27197/responsive-images/284462_AdamRichamnEatsItaly_S001_8___default_850_638.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/27197/responsive-images/284462_AdamRichamnEatsItaly_S001_8___default_850_638.webp — 200 — 81.9 KiB — 46 ms — h2https://foodnetwork.co.uk/images/disco+logo.png/images/disco+logo.png https://foodnetwork.co.uk/images/disco+logo.png — 200 — 1.9 KiB — 19 ms — h2https://foodnetwork.co.uk/images/fallback-landscape.webp/images/fallback-landscape.webp https://foodnetwork.co.uk/images/fallback-landscape.webp — 200 — 59.1 KiB — 62 ms — h2https://foodnetwork.co.uk/images/illustrations/top-orange.svg/images/illustrations/top-orange.sv... 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
47% of JavaScript execution is third-party
First-party Third-party 2122ms · 695KB · £31/mo
Unattributable
Other
Costly
Execution 1072ms
Transfer 0 KB
Monthly Cost £16/mo
s.ntv.io
Other
Costly
Execution 364ms
Transfer 251 KB
Unused 76%
Monthly Cost £5/mo
OneTrust
Consent
Essential
Execution 360ms
Transfer 128 KB
Unused 48%
Monthly Cost £5/mo
8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app
Other
Costly
Execution 208ms
Transfer 190 KB
Unused 19%
Monthly Cost £3/mo
Google Tag Manager
Tag Manager
Optional
Execution 118ms
Transfer 126 KB
Unused 56%
Monthly Cost £2/mo

These scripts may cost more than they're worth

  • Unattributable adds 1072ms and costs ~£16/month
  • s.ntv.io adds 364ms and costs ~£5/month
  • 8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app adds 208ms and costs ~£3/month

47% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 1072ms 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

s.ntv.io takes 364ms 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

76% of s.ntv.io'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

8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app takes 208ms 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

56% 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

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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