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https://foodnetwork.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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.
60
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

1.38 s

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

2.03 s

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

58 ms

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

0.011

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

1.38 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.

2.71 s

Page Load Progression

420 ms
840 ms
1.3 s
1.7 s
2.1 s
2.5 s
2.9 s
3.4 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
2.6 MB transferred, 70 requests
FIX
2.6 MB transferred, 70 requests
Warning::
Page weighs 6.6 MB (2.6 MB transferred)
Warning::
Images are 1.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.4 MB
Warning::
JavaScript is 1.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.0 MB
Info::
70 HTTP requests
Info::
Estimated 0.55 g CO2 per page load
2.6 MB / 2.4 MB budget
2.6 MB transferred
70 requests
0.55 g CO2 per page load
Images 1.4 MiB 55%
JavaScript 1.0 MiB 40%
HTML 71.6 KiB 3%
CSS 46.8 KiB 2%
Fonts 14.9 KiB 1%
Other 2.0 KiB 0%
Other 2.0 KiB 0%
Other 1.6 KiB 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
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.6 MiB of 2.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
13 scripts, 595 KB unused
FIX
13 scripts, 595 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-DgXofkk...: 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...: 79 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WHC...: 72 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.whisk.com/sdk/shopping-list.js: 58 KB unused (91%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 595 KB
595 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-DgXofkk-.js309 KB158 KB (51%)✓3rd
https://foodnetwork.co.uk/static-js/prebid7.12.0.js100 KB79 KB (80%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHCQZ5T126 KB72 KB (57%)✓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 (20%)✓3rd
https://cdn.tagdeliver.com/cipt/17137.js21 KB—✓3rd
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js0 KB—✓3rd
https://foodnetwork.co.uk/build/assets/Home-DR-r42l6.js2 KB—✓3rd
https://foodnetwork.co.uk/build/assets/Default-CklsOTs7.js1 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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
70 resources · 2.6 MB · 595 KB savings available
FIX
70 resources · 2.6 MB · 595 KB savings available
Warning::
Page weight 1.6 MB over 1MB target
Got: 2.6 MB Expected: ≤ 1 MB
Info::
~595 KB of savings available
Warning::
69 third-party resources (100% of weight)
Info::
4 resources over 200KB
70 resources · 2.6 MiB · 69 third-party 1.6 MiB over 1MB target
Image 55% · 1.4 MiB
JavaScript 40% · 1.0 MiB
Document 3% · 72.5 KiB
CSS 2% · 46.8 KiB
Font 1% · 14.9 KiB
Other 0% · 4.6 KiB

~594.9 KiB of savings available

Remove unused JavaScript: 594.9 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
35 images, 0 KB saveable
REVIEW
35 images, 0 KB saveable
Info::
All images are well-optimized
35 images 1.4 MB
0 oversized -0 KB
14 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1022ms total JS execution
REVIEW
1022ms total JS execution
Warning::
https://foodnetwork.co.uk/?utm_source=foodnetwork....: 453ms CPU time
Info::
https://foodnetwork.co.uk/build/assets/app-DgXofkk...: 235ms CPU time
Info::
Unattributable: 171ms CPU time
Info::
https://s.ntv.io/serve/load.js: 93ms CPU time
Info::
https://8512b548-2306-4976-a576-a880f2c35e4e.edge....: 69ms CPU time
Warning::
Third-party scripts: 1022ms (100% of total)

Main Thread Breakdown

Script Evaluation 35% Other 25% Style & Layout 24% Rendering 8% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domestic453ms57ms2ms3rd
https://foodnetwork.co.uk/build/assets/app-DgXofkk-.js235ms149ms1ms3rd
Unattributable171ms3ms0ms3rd
https://s.ntv.io/serve/load.js93ms71ms20ms3rd
https://8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app/e7d4aac7-7c82-4bb4-a499-57dccccec460-web.js69ms42ms24ms3rd
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 500 ms 1.0 s 1.5 s 2.0 s FCP 1.4 s LCP 2.0 shttps://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2gilroy-ultralight-webfo... https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2 — 147 B — 8 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2gilroy-light-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2 — 153 B — 23 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2gilroy-regular-webfont.... https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2 — 271 B — 22 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2gilroy-medium-webfont.w... https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2 — 119 B — 9 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2gilroy-semibold-webfont... https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2 — 119 B — 9 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2gilroy-bold-webfont.woff2 https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2 — 146 B — 22 ms — font-display: swaphttps://foodnetwork.co.uk/fonts/FoodNetwork.woff2FoodNetwork.woff2 https://foodnetwork.co.uk/fonts/FoodNetwork.woff2 — 14.0 KiB — 13 ms — font-display: swap
gilroy-ultralight-webfo... woff2 swap
Size 0 KB
Load time 8 ms
Start 99 ms
Risk FOUT — text flashes from fallback to web font
gilroy-light-webfont.woff2 woff2 swap
Size 0 KB
Load time 23 ms
Start 99 ms
Risk FOUT — text flashes from fallback to web font
gilroy-regular-webfont.... woff2 swap
Size 0 KB
Load time 22 ms
Start 100 ms
Risk FOUT — text flashes from fallback to web font
gilroy-medium-webfont.w... woff2 swap
Size 0 KB
Load time 9 ms
Start 100 ms
Risk FOUT — text flashes from fallback to web font
gilroy-semibold-webfont... woff2 swap
Size 0 KB
Load time 9 ms
Start 100 ms
Risk FOUT — text flashes from fallback to web font
gilroy-bold-webfont.woff2 woff2 swap
Size 0 KB
Load time 22 ms
Start 100 ms
Risk FOUT — text flashes from fallback to web font
FoodNetwork.woff2 woff2 swap
Size 14 KB
Load time 13 ms
Start 291 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
70 requests over 2992ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.4 s LCP 2.0 shttps://foodnetwork.com// https://foodnetwork.com/ — 301 — 413 B — 10 ms — http/1.1https://www.foodnetwork.com/www.foodnetwork.com/ https://www.foodnetwork.com/ — 301 — 825 B — 58 ms — h2http://www.foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domesticwww.foodnetwork.co.uk/?utm_source=f... http://www.foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domestic — 307 — 0 B — 2 ms — http/1.1https://www.foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domesticwww.foodnetwork.co.uk/?utm_source=f... https://www.foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domestic — 301 — 383 B — 7 ms — h2https://foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domesticfoodnetwork.co.uk/?utm_source=foodn... https://foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domestic — 200 — 71.6 KiB — 6 ms — h2https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2foodnetwork.co.uk/fonts/gilroy-ultr... https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2 — 404 — 147 B — 8 ms — h2https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2foodnetwork.co.uk/fonts/gilroy-ligh... https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2 — 404 — 153 B — 23 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 192 ms — https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2foodnetwork.co.uk/fonts/gilroy-regu... https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2 — 404 — 271 B — 22 ms — h2https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2foodnetwork.co.uk/fonts/gilroy-medi... https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2 — 404 — 119 B — 9 ms — h2https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2foodnetwork.co.uk/fonts/gilroy-semi... https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2 — 404 — 119 B — 9 ms — h2https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2foodnetwork.co.uk/fonts/gilroy-bold... https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2 — 404 — 146 B — 22 ms — h2https://foodnetwork.co.uk/build/assets/app-CjuUoRWY.cssfoodnetwork.co.uk/build/assets/app-... https://foodnetwork.co.uk/build/assets/app-CjuUoRWY.css — 200 — 39.5 KiB — 34 ms — h2https://foodnetwork.co.uk/build/assets/app-CIP97hy0.cssfoodnetwork.co.uk/build/assets/app-... https://foodnetwork.co.uk/build/assets/app-CIP97hy0.css — 200 — 6.9 KiB — 14 ms — h2https://foodnetwork.co.uk/build/assets/app-DgXofkk-.jsfoodnetwork.co.uk/build/assets/app-... https://foodnetwork.co.uk/build/assets/app-DgXofkk-.js — 200 — 308.7 KiB — 67 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/24405/responsive-images/everything-bagel-creamed-spinach___default_1452_1089.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/24405/responsive-images/everything-bagel-creamed-spinach___default_1452_1089.webp — 200 — 247.6 KiB — 59 ms — h2https://foodnetwork.co.uk/images/play-icon.svgfoodnetwork.co.uk/images/play-icon.... https://foodnetwork.co.uk/images/play-icon.svg — 200 — 610 B — 16 ms — h2https://foodnetwork.co.uk/static-js/prebid7.12.0.jsfoodnetwork.co.uk/static-js/prebid7... https://foodnetwork.co.uk/static-js/prebid7.12.0.js — 200 — 99.7 KiB — 42 ms — h2https://cdn.tagdeliver.com/cipt/17137.jscdn.tagdeliver.com/cipt/17137.js https://cdn.tagdeliver.com/cipt/17137.js — 200 — 20.8 KiB — 146 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 — 132 ms — h3https://s.ntv.io/serve/load.jss.ntv.io/serve/load.js https://s.ntv.io/serve/load.js — 200 — 251.1 KiB — 108 ms — http/1.1https://foodnetwork.co.uk/images/logo26.pngfoodnetwork.co.uk/images/logo26.png https://foodnetwork.co.uk/images/logo26.png — 200 — 8.3 KiB — 17 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/27197/responsive-images/284462_AdamRichamnEatsItaly_S001_8___default_1452_1089.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/27197/responsive-images/284462_AdamRichamnEatsItaly_S001_8___default_1452_1089.webp — 200 — 158.2 KiB — 47 ms — h2https://foodnetwork.co.uk/images/disco+logo.pngfoodnetwork.co.uk/images/disco+logo... https://foodnetwork.co.uk/images/disco+logo.png — 200 — 1.6 KiB — 14 ms — h2https://foodnetwork.co.uk/images/fallback-landscape.webpfoodnetwork.co.uk/images/fallback-l... https://foodnetwork.co.uk/images/fallback-landscape.webp — 200 — 59.1 KiB — 23 ms — h2https://foodnetwork.co.uk/images/illustrations/top-orange.svgfoodnetwork.co.uk/images/illustrati... https://foodnetwork.co.uk/images/illustrations/top-orange.svg — 200 — 9.3 KiB — 11 ms — h2https://foodnetwork.co.uk/images/illustrations/leaf.svgfoodnetwork.co.uk/images/illustrati... https://foodnetwork.co.uk/images/illustrations/leaf.svg — 200 — 7.2 KiB — 17 ms — h2https://foodnetwork.co.uk/images/illustrations/orange-v2.svgfoodnetwork.co.uk/images/illustrati... https://foodnetwork.co.uk/images/illustrations/orange-v2.svg — 200 — 10.6 KiB — 10 ms — h2https://foodnetwork.co.uk/images/logo-white.pngfoodnetwork.co.uk/images/logo-white... https://foodnetwork.co.uk/images/logo-white.png — 200 — 3.6 KiB — 14 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 — 126.2 KiB — 148 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 1.4 s LCP 2.0 shttps://foodnetwork.com// https://foodnetwork.com/ — 301 — 413 B — 10 ms — http/1.1https://www.foodnetwork.com/www.foodnetwork.com/ https://www.foodnetwork.com/ — 301 — 825 B — 58 ms — h2http://www.foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domesticwww.foodnetwork.co.uk/?utm_source=f... http://www.foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domestic — 307 — 0 B — 2 ms — http/1.1https://www.foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domesticwww.foodnetwork.co.uk/?utm_source=f... https://www.foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domestic — 301 — 383 B — 7 ms — h2https://foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domesticfoodnetwork.co.uk/?utm_source=foodn... https://foodnetwork.co.uk/?utm_source=foodnetwork.com&utm_medium=domestic — 200 — 71.6 KiB — 6 ms — h2https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2foodnetwork.co.uk/fonts/gilroy-ultr... https://foodnetwork.co.uk/fonts/gilroy-ultralight-webfont.woff2 — 404 — 147 B — 8 ms — h2https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2foodnetwork.co.uk/fonts/gilroy-ligh... https://foodnetwork.co.uk/fonts/gilroy-light-webfont.woff2 — 404 — 153 B — 23 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 192 ms — https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2foodnetwork.co.uk/fonts/gilroy-regu... https://foodnetwork.co.uk/fonts/gilroy-regular-webfont.woff2 — 404 — 271 B — 22 ms — h2https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2foodnetwork.co.uk/fonts/gilroy-medi... https://foodnetwork.co.uk/fonts/gilroy-medium-webfont.woff2 — 404 — 119 B — 9 ms — h2https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2foodnetwork.co.uk/fonts/gilroy-semi... https://foodnetwork.co.uk/fonts/gilroy-semibold-webfont.woff2 — 404 — 119 B — 9 ms — h2https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2foodnetwork.co.uk/fonts/gilroy-bold... https://foodnetwork.co.uk/fonts/gilroy-bold-webfont.woff2 — 404 — 146 B — 22 ms — h2https://foodnetwork.co.uk/build/assets/app-CjuUoRWY.cssfoodnetwork.co.uk/build/assets/app-... https://foodnetwork.co.uk/build/assets/app-CjuUoRWY.css — 200 — 39.5 KiB — 34 ms — h2https://foodnetwork.co.uk/build/assets/app-CIP97hy0.cssfoodnetwork.co.uk/build/assets/app-... https://foodnetwork.co.uk/build/assets/app-CIP97hy0.css — 200 — 6.9 KiB — 14 ms — h2https://foodnetwork.co.uk/build/assets/app-DgXofkk-.jsfoodnetwork.co.uk/build/assets/app-... https://foodnetwork.co.uk/build/assets/app-DgXofkk-.js — 200 — 308.7 KiB — 67 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/24405/responsive-images/everything-bagel-creamed-spinach___default_1452_1089.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/24405/responsive-images/everything-bagel-creamed-spinach___default_1452_1089.webp — 200 — 247.6 KiB — 59 ms — h2https://foodnetwork.co.uk/images/play-icon.svgfoodnetwork.co.uk/images/play-icon.... https://foodnetwork.co.uk/images/play-icon.svg — 200 — 610 B — 16 ms — h2https://foodnetwork.co.uk/static-js/prebid7.12.0.jsfoodnetwork.co.uk/static-js/prebid7... https://foodnetwork.co.uk/static-js/prebid7.12.0.js — 200 — 99.7 KiB — 42 ms — h2https://cdn.tagdeliver.com/cipt/17137.jscdn.tagdeliver.com/cipt/17137.js https://cdn.tagdeliver.com/cipt/17137.js — 200 — 20.8 KiB — 146 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 — 132 ms — h3https://s.ntv.io/serve/load.jss.ntv.io/serve/load.js https://s.ntv.io/serve/load.js — 200 — 251.1 KiB — 108 ms — http/1.1https://foodnetwork.co.uk/images/logo26.pngfoodnetwork.co.uk/images/logo26.png https://foodnetwork.co.uk/images/logo26.png — 200 — 8.3 KiB — 17 ms — h2https://d2vsf1hynzxim7.cloudfront.net/production/media/27197/responsive-images/284462_AdamRichamnEatsItaly_S001_8___default_1452_1089.webpd2vsf1hynzxim7.cloudfront.net/produ... https://d2vsf1hynzxim7.cloudfront.net/production/media/27197/responsive-images/284462_AdamRichamnEatsItaly_S001_8___default_1452_1089.webp — 200 — 158.2 KiB — 47 ms — h2https://foodnetwork.co.uk/images/disco+logo.pngfoodnetwork.co.uk/images/disco+logo... https://foodnetwork.co.uk/images/disco+logo.png — 200 — 1.6 KiB — 14 ms — h2https://foodnetwork.co.uk/images/fallback-landscape.webpfoodnetwork.co.uk/images/fallback-l... https://foodnetwork.co.uk/images/fallback-landscape.webp — 200 — 59.1 KiB — 23 ms — h2https://foodnetwork.co.uk/images/illustrations/top-orange.svgfoodnetwork.co.uk/images/illustrati... https://foodnetwork.co.uk/images/illustrations/top-orange.svg — 200 — 9.3 KiB — 11 ms — 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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
100% of JavaScript execution is third-party
First-party Third-party 1022ms · 821KB · €16/mo
foodnetwork.co.uk
Other
Costly
Execution 453ms
Transfer 72 KB
Monthly Cost €7/mo
foodnetwork.co.uk
Other
Costly
Execution 235ms
Transfer 309 KB
Unused 51%
Monthly Cost €4/mo
Unattributable
Other
Optional
Execution 171ms
Transfer 0 KB
Monthly Cost €3/mo
s.ntv.io
Other
Optional
Execution 93ms
Transfer 251 KB
Unused 76%
Monthly Cost €1/mo
8512b548-2306-4976-a576-a880f2c35e4e.edge.permutive.app
Other
Optional
Execution 69ms
Transfer 190 KB
Unused 20%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • foodnetwork.co.uk adds 453ms and costs ~€7/month
  • foodnetwork.co.uk adds 235ms and costs ~€4/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

foodnetwork.co.uk takes 453ms 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

foodnetwork.co.uk takes 235ms 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

51% of foodnetwork.co.uk'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

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

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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