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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
53
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
94
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

2.90 s

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

7.02 s

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

760 ms

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

0.050

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

2.90 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.

16.32 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
8 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
2.9 MB transferred, 86 requests
FIX
2.9 MB transferred, 86 requests
Warning::
Page weighs 10.9 MB (2.9 MB transferred)
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Info::
86 HTTP requests
Info::
Estimated 0.60 g CO2 per page load
2.9 MB / 2.4 MB budget
2.9 MB transferred
86 requests
0.60 g CO2 per page load
JavaScript 1.4 MiB 48%
Images 1019.8 KiB 35%
HTML 159.8 KiB 5%
Fonts 157.3 KiB 5%
CSS 139.0 KiB 5%
Other 32.7 KiB 1%
Other 5.3 KiB 0%
Other 1.1 KiB 0%
Other 561 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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 (2.9 MiB of 2.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3475ms total JS execution
FIX
3475ms total JS execution
Warning::
https://www.nobelprize.org/: 1213ms CPU time
Warning::
Unattributable: 493ms CPU time
Warning::
https://cdn.cookielaw.org/scripttemplates/202408.1...: 431ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MY66...: 362ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WDH...: 361ms CPU time
Warning::
Third-party scripts: 3475ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Other 18% Style & Layout 16% Script Parsing & Compilation 9% Rendering 5% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.nobelprize.org/1213ms191ms36ms3rd
Unattributable493ms70ms0ms3rd
https://cdn.cookielaw.org/scripttemplates/202408.1.0/otBannerSdk.js431ms276ms72ms3rd
https://www.googletagmanager.com/gtag/js?id=G-MY66JBWQGX&cx=c&gtm=4e64h1362ms296ms60ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WDHZ8W5361ms278ms78ms3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js214ms179ms30ms3rd
https://js-agent.newrelic.com/nr-spa-1.313.1.min.js193ms159ms15ms3rd
https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/lazysizes/lazysizes.min.js?ver=177555444799ms53ms1ms3rd
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js58ms42ms4ms3rd
https://www.nobelprize.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.152ms39ms11ms3rd
D
Page Weight Inventory
Action
86 resources · 2.9 MB · 242 KB savings available
FIX
86 resources · 2.9 MB · 242 KB savings available
Warning::
Page weight 1.9 MB over 1MB target
Got: 2.9 MB Expected: ≤ 1 MB
Info::
~242 KB of savings available
Warning::
85 third-party resources (100% of weight)
Info::
2 resources over 200KB
86 resources · 2.9 MiB · 85 third-party 1.9 MiB over 1MB target
JavaScript 48% · 1.4 MiB
Image 35% · 1022.3 KiB
Document 5% · 159.9 KiB
Font 5% · 157.3 KiB
CSS 5% · 143.3 KiB
Other 1% · 32.8 KiB

~242.2 KiB of savings available

Remove unused JavaScript: 242.2 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
12 images, 0 KB saveable
REVIEW
12 images, 0 KB saveable
Warning::
data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEA... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
12 images 1020 KB
0 oversized -0 KB
7 legacy format
1 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

C
JS Bundles
Action
32 scripts, 242 KB unused
REVIEW
32 scripts, 242 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MY66...: 62 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WDH...: 62 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202408.1...: 60 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://script.hotjar.com/modules.6a0f3932cb1341a3...: 38 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.nobelprize.org/wp-includes/js/jquery/j...: 21 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 242 KB
242 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-MY66JBWQGX&cx=c&gtm=4e64h1156 KB62 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WDHZ8W5136 KB62 KB (45%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202408.1.0/otBannerSdk.js111 KB60 KB (54%)✓3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js57 KB38 KB (67%)✓3rd
https://www.nobelprize.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.130 KB21 KB (69%)✓3rd
https://cdn.cookielaw.org/consent/d75760b8-7732-445e-9a87-2de3e237d0fe/OtAutoBlock.js3 KB—✓3rd
https://js-agent.newrelic.com/nr-spa-1.313.1.min.js30 KB—✓3rd
https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/objectfit/ls.object-fit.min.js?ver=17755544471 KB—✓3rd
https://www.nobelprize.org/wp-content/plugins/nobelprize/assets/js/admin/lib/flickity/flickity.pkgd.js?ver=177555444727 KB—✗3rd
https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/clamp/clamp.min.js?ver=17755544471 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

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
6 fonts (157 KB)
PASS
6 fonts (157 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

157 KB total

Render-blocking

0

of 6

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 2.9 s LCP 7.0 shttps://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSerifText-Regular.woff2AlfredSerifText-Regular... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSerifText-Regular.woff2 — 36.6 KiB — 13 ms — font-display: swaphttps://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSans-Regular.woff2AlfredSans-Regular.woff2 https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSans-Regular.woff2 — 24.1 KiB — 27 ms — font-display: swaphttps://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSans-Italic.woff2AlfredSans-Italic.woff2 https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSans-Italic.woff2 — 24.5 KiB — 29 ms — font-display: swaphttps://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSerifText-Bold.woff2AlfredSerifText-Bold.woff2 https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSerifText-Bold.woff2 — 38.3 KiB — 12 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 71 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 71 ms — font-display: swap
AlfredSerifText-Regular... woff2 swap
Size 37 KB
Load time 13 ms
Start 235 ms
Risk FOUT — text flashes from fallback to web font
AlfredSans-Regular.woff2 woff2 swap
Size 24 KB
Load time 27 ms
Start 236 ms
Risk FOUT — text flashes from fallback to web font
AlfredSans-Italic.woff2 woff2 swap
Size 25 KB
Load time 29 ms
Start 236 ms
Risk FOUT — text flashes from fallback to web font
AlfredSerifText-Bold.woff2 woff2 swap
Size 38 KB
Load time 12 ms
Start 549 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 71 ms
Start 616 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 71 ms
Start 619 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
—
preload
—
dns-prefetch
2
prefetch
—

2 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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
86 requests over 4460ms
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 2.9 s LCP 7.0 shttps://nobelprize.org// https://nobelprize.org/ — 301 — 176 B — 19 ms — h3https://www.nobelprize.org/www.nobelprize.org/ https://www.nobelprize.org/ — 200 — 48.9 KiB — 31 ms — h3https://www.nobelprize.org/wp-content/plugins/nobelprize-block-library/dist/css/frontend-style.css?ver=479338bdb1657cc05d08www.nobelprize.org/wp-content/plugi... https://www.nobelprize.org/wp-content/plugins/nobelprize-block-library/dist/css/frontend-style.css?ver=479338bdb1657cc05d08 — 200 — 696 B — 16 ms — h3https://www.nobelprize.org/wp-content/themes/nobelprize/dist/css/frontend.css?ver=1775560393www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/dist/css/frontend.css?ver=1775560393 — 200 — 35.0 KiB — 21 ms — h3https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/loadjs.js?ver=1775554447www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/loadjs.js?ver=1775554447 — 200 — 488 B — 13 ms — h3https://cdn.cookielaw.org/consent/d75760b8-7732-445e-9a87-2de3e237d0fe/OtAutoBlock.jscdn.cookielaw.org/consent/d75760b8-... https://cdn.cookielaw.org/consent/d75760b8-7732-445e-9a87-2de3e237d0fe/OtAutoBlock.js — 200 — 3.0 KiB — 32 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 25 ms — h2https://www.nobelprize.org/wp-content/themes/nobelprize/assets/images/spinner.gifwww.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/images/spinner.gif — 200 — 31.7 KiB — 19 ms — h3https://www.nobelprize.org/wp-content/plugins/nobelprize-block-library/dist/js/frontend.js?ver=31920f0e291e7d415663www.nobelprize.org/wp-content/plugi... https://www.nobelprize.org/wp-content/plugins/nobelprize-block-library/dist/js/frontend.js?ver=31920f0e291e7d415663 — 200 — 1.4 KiB — 18 ms — h3https://www.nobelprize.org/wp-content/themes/nobelprize/dist/js/frontend.js?ver=1775560393www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/dist/js/frontend.js?ver=1775560393 — 200 — 10.0 KiB — 10 ms — h3https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/bgset/ls.bgset.min.js?ver=1775554447www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/bgset/ls.bgset.min.js?ver=1775554447 — 200 — 1.4 KiB — 12 ms — h3https://cdn.cookielaw.org/consent/d75760b8-7732-445e-9a87-2de3e237d0fe/d75760b8-7732-445e-9a87-2de3e237d0fe.jsoncdn.cookielaw.org/consent/d75760b8-... https://cdn.cookielaw.org/consent/d75760b8-7732-445e-9a87-2de3e237d0fe/d75760b8-7732-445e-9a87-2de3e237d0fe.json — 200 — 2.3 KiB — 30 ms — h2https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/lazysizes/lazysizes.min.js?ver=1775554447www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/lazysizes/lazysizes.min.js?ver=1775554447 — 200 — 3.4 KiB — 31 ms — h3https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/objectfit/ls.object-fit.min.js?ver=1775554447www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/objectfit/ls.object-fit.min.js?ver=1775554447 — 200 — 1.3 KiB — 29 ms — h3https://www.nobelprize.org/wp-content/plugins/nobelprize/assets/js/admin/lib/flickity/flickity.pkgd.js?ver=1775554447www.nobelprize.org/wp-content/plugi... https://www.nobelprize.org/wp-content/plugins/nobelprize/assets/js/admin/lib/flickity/flickity.pkgd.js?ver=1775554447 — 200 — 27.1 KiB — 36 ms — h3https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/clamp/clamp.min.js?ver=1775554447www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/js/frontend/lib/clamp/clamp.min.js?ver=1775554447 — 200 — 1.5 KiB — 29 ms — h3https://www.nobelprize.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1www.nobelprize.org/wp-includes/js/j... https://www.nobelprize.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 — 200 — 30.2 KiB — 38 ms — h3https://www.nobelprize.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1www.nobelprize.org/wp-includes/js/j... https://www.nobelprize.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1 — 200 — 5.1 KiB — 14 ms — h3https://stats.wp.com/e-202617.jsstats.wp.com/e-202617.js https://stats.wp.com/e-202617.js — 200 — 1.7 KiB — 9 ms — h2data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==data:image/gif;base64,R0lGODlhAQABA... data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw== — 200 — 0 B — 0 ms — datahttps://www.youtube.com/embed/pUIp0zNG7Ro?feature=oembedwww.youtube.com/embed/pUIp0zNG7Ro?f... https://www.youtube.com/embed/pUIp0zNG7Ro?feature=oembed — 200 — 54.3 KiB — 371 ms — h2https://www.youtube.com/embed/Ihq2nIne9-Q?feature=oembedwww.youtube.com/embed/Ihq2nIne9-Q?f... https://www.youtube.com/embed/Ihq2nIne9-Q?feature=oembed — 200 — 56.6 KiB — 347 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' f…www.w3.org/2000/svg' width='24' hei... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' f… — 200 — 0 B — 0 ms — datahttps://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSerifText-Regular.woff2www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSerifText-Regular.woff2 — 200 — 36.6 KiB — 13 ms — h3https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSans-Regular.woff2www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSans-Regular.woff2 — 200 — 24.1 KiB — 27 ms — h3https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSans-Italic.woff2www.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/assets/fonts/alfred/AlfredSans-Italic.woff2 — 200 — 24.5 KiB — 29 ms — h3https://geolocation.onetrust.com/cookieconsentpub/v1/geo/locationgeolocation.onetrust.com/cookiecons... https://geolocation.onetrust.com/cookieconsentpub/v1/geo/location — 200 — 307 B — 61 ms — h2https://www.nobelprize.org/wp-content/themes/nobelprize/dist/js/736.902b2b0b76c2b6a74896.chunk.jswww.nobelprize.org/wp-content/theme... https://www.nobelprize.org/wp-content/themes/nobelprize/dist/js/736.902b2b0b76c2b6a74896.chunk.js — 200 — 554 B — 26 ms — 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https://googleads.g.doubleclick.net/pagead/id — 302 — 23 B — 185 ms — h3https://static.doubleclick.net/instream/ad_status.jsstatic.doubleclick.net/instream/ad_... https://static.doubleclick.net/instream/ad_status.js — 200 — 495 B — 70 ms — h2https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywGc21Bc99sDrhbnjOkQlq7nTfp_WQ/m=r78Drbwww.youtube.com/s/_/ytembeds/_/js/k... https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywGc21Bc99sDrhbnjOkQlq7nTfp_WQ/m=r78Drb — 200 — 146.3 KiB — 18 ms — h3https://googleads.g.doubleclick.net/pagead/idgoogleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id — 302 — 23 B — 167 ms — h3https://static.doubleclick.net/instream/ad_status.jsstatic.doubleclick.net/instream/ad_... https://static.doubleclick.net/instream/ad_status.js — 200 — 0 B — 52 ms — h2https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywGc21Bc99sDrhbnjOkQlq7nTfp_WQ/m=r78Drbwww.youtube.com/s/_/ytembeds/_/js/k... https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywGc21Bc99sDrhbnjOkQlq7nTfp_WQ/m=r78Drb — 200 — 0 B — 7 ms — h3https://googleads.g.doubleclick.net/pagead/id?slf_rd=1googleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id?slf_rd=1 — 200 — 146 B — 58 ms — h3https://googleads.g.doubleclick.net/pagead/id?slf_rd=1googleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id?slf_rd=1 — 200 — 146 B — 108 ms — h3https://i.ytimg.com/vi_webp/Ihq2nIne9-Q/sddefault.webpi.ytimg.com/vi_webp/Ihq2nIne9-Q/sdd... https://i.ytimg.com/vi_webp/Ihq2nIne9-Q/sddefault.webp — 200 — 21.1 KiB — 126 ms — h2https://i.ytimg.com/vi/pUIp0zNG7Ro/sddefault.jpgi.ytimg.com/vi/pUIp0zNG7Ro/sddefaul... https://i.ytimg.com/vi/pUIp0zNG7Ro/sddefault.jpg — 200 — 66.7 KiB — 71 ms — h2https://js-agent.newrelic.com/nr-spa-1.313.1.min.jsjs-agent.newrelic.com/nr-spa-1.313.... https://js-agent.newrelic.com/nr-spa-1.313.1.min.js — 200 — 30.3 KiB — 108 ms — h2https://www.nobelprize.org/uploads/2018/08/Nobel-favicon-50x50.pngwww.nobelprize.org/uploads/2018/08/... https://www.nobelprize.org/uploads/2018/08/Nobel-favicon-50x50.png — 200 — 927 B — 13 ms — h3https://www.google.com/js/th/rOmrN60AN-U9GRTHX8orPjMEIJ8wTXyJ5HZew_AwfbI.jswww.google.com/js/th/rOmrN60AN-U9GR... https://www.google.com/js/th/rOmrN60AN-U9GRTHX8orPjMEIJ8wTXyJ5HZew_AwfbI.js — 200 — 23.1 KiB — 65 ms — h3https://www.google.com/js/th/rOmrN60AN-U9GRTHX8orPjMEIJ8wTXyJ5HZew_AwfbI.jswww.google.com/js/th/rOmrN60AN-U9GR... https://www.google.com/js/th/rOmrN60AN-U9GRTHX8orPjMEIJ8wTXyJ5HZew_AwfbI.js — 200 — 0 B — 43 ms — h3https://bam.eu01.nr-data.net/1/NRJS-0940f7eaf4cb46e1cfe?a=211664124&v=1.313.1&to=MhBSZQoZXUZZB0UMCwtacVIMEVxbFxdYCwMJEB1BGR9W&rst=1915&ck=0&s=bb186c0d90fb1a8d&ref=https://www.nobelprize.org/&ptid=61e23a3cf0ef4ea2&af=err,spa,xhr,stn,ins&ap=326&be=48&fe=1731&dc=318&at=HldRE0IDTkg%3D&fsh=1&perf=%7B%22timing%22:%7B%22of%22:1776800143879,%22n%22:0,%22f%22:21,%22dn%22:21,%22dne%22:21,%22c%22:21,%22s%22:21,%22ce%22:21,%22rq%22:29,%22rp%22:49,%22rpe%22:53,%22di%22:356,%22ds%22:359,%22de%22:366,%22dc%22:1776,%22l%22:1776,%22le%22:1779%7D,%22navigation%22:%7B%7D%7D&fp=252&fcp=252bam.eu01.nr-data.net/1/NRJS-0940f7e... https://bam.eu01.nr-data.net/1/NRJS-0940f7eaf4cb46e1cfe?a=211664124&v=1.313.1&to=MhBSZQoZXUZZB0UMCwtacVIMEVxbFxdYCwMJEB1BGR9W&rst=1915&ck=0&s=bb186c0d90fb1a8d&ref=https://www.nobelprize.org/&ptid=61e23a3cf0ef4ea2&af=err,spa,xhr,stn,ins&ap=326&be=48&fe=1731&dc=318&at=HldRE0IDTkg%3D&fsh=1&perf=%7B%22timing%22:%7B%22of%22:1776800143879,%22n%22:0,%22f%22:21,%22dn%22:21,%22dne%22:21,%22c%22:21,%22s%22:21,%22ce%22:21,%22rq%22:29,%22rp%22:49,%22rpe%22:53,%22di%22:356,%22ds%22:359,%22de%22:366,%22dc%22:1776,%22l%22:1776,%22le%22:1779%7D,%22navigation%22:%7B%7D%7D&fp=252&fcp=252 — 200 — 733 B — 1.1 s — http/1.1https://www.youtube.com/generate_204?yxsxlAwww.youtube.com/generate_204?yxsxlA https://www.youtube.com/generate_204?yxsxlA — 204 — 10 B — 4 ms — h3https://www.youtube.com/generate_204?ONmufQwww.youtube.com/generate_204?ONmufQ https://www.youtube.com/generate_204?ONmufQ — 204 — 10 B — 4 ms — h3https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 0 B — 115 ms — h2https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 0 B — 89 ms — h2https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 312 B — 60 ms — h2https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 189 B — 62 ms — h2https://bam.eu01.nr-data.net/events/1/NRJS-0940f7eaf4cb46e1cfe?a=211664124&v=1.313.1&to=MhBSZQoZXUZZB0UMCwtacVIMEVxbFxdYCwMJEB1BGR9W&rst=3009&ck=0&s=bb186c0d90fb1a8d&ref=https://www.nobelprize.org/&ptid=61e23a3cf0ef4ea2bam.eu01.nr-data.net/events/1/NRJS-... https://bam.eu01.nr-data.net/events/1/NRJS-0940f7eaf4cb46e1cfe?a=211664124&v=1.313.1&to=MhBSZQoZXUZZB0UMCwtacVIMEVxbFxdYCwMJEB1BGR9W&rst=3009&ck=0&s=bb186c0d90fb1a8d&ref=https://www.nobelprize.org/&ptid=61e23a3cf0ef4ea2 — 200 — 366 B — 237 ms — http/1.1https://bam.eu01.nr-data.net/jserrors/1/NRJS-0940f7eaf4cb46e1cfe?a=211664124&v=1.313.1&to=MhBSZQoZXUZZB0UMCwtacVIMEVxbFxdYCwMJEB1BGR9W&rst=3011&ck=0&s=bb186c0d90fb1a8d&ref=https://www.nobelprize.org/&ptid=61e23a3cf0ef4ea2bam.eu01.nr-data.net/jserrors/1/NRJ... https://bam.eu01.nr-data.net/jserrors/1/NRJS-0940f7eaf4cb46e1cfe?a=211664124&v=1.313.1&to=MhBSZQoZXUZZB0UMCwtacVIMEVxbFxdYCwMJEB1BGR9W&rst=3011&ck=0&s=bb186c0d90fb1a8d&ref=https://www.nobelprize.org/&ptid=61e23a3cf0ef4ea2 — 200 — 366 B — 326 ms — http/1.1https://bam.eu01.nr-data.net/events/1/NRJS-0940f7eaf4cb46e1cfe?a=211664124&v=1.313.1&to=MhBSZQoZXUZZB0UMCwtacVIMEVxbFxdYCwMJEB1BGR9W&rst=3013&ck=0&s=bb186c0d90fb1a8d&ref=https://www.nobelprize.org/&ptid=61e23a3cf0ef4ea2bam.eu01.nr-data.net/events/1/NRJS-... https://bam.eu01.nr-data.net/events/1/NRJS-0940f7eaf4cb46e1cfe?a=211664124&v=1.313.1&to=MhBSZQoZXUZZB0UMCwtacVIMEVxbFxdYCwMJEB1BGR9W&rst=3013&ck=0&s=bb186c0d90fb1a8d&ref=https://www.nobelprize.org/&ptid=61e23a3cf0ef4ea2 — 200 — 366 B — 323 ms — http/1.1https://www.youtube.com/youtubei/v1/log_event?alt=jsonwww.youtube.com/youtubei/v1/log_eve... https://www.youtube.com/youtubei/v1/log_event?alt=json — 200 — 50 B — 61 ms — h3https://www.youtube.com/youtubei/v1/log_event?alt=jsonwww.youtube.com/youtubei/v1/log_eve... https://www.youtube.com/youtubei/v1/log_event?alt=json — 200 — 50 B — 63 ms — h3
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 3475ms · 582KB · $46/mo
www.nobelprize.org
Other
Costly
Execution 1213ms
Transfer 49 KB
Monthly Cost $16/mo
Unattributable
Other
Costly
Execution 493ms
Transfer 0 KB
Monthly Cost $7/mo
OneTrust
Consent
Essential
Execution 431ms
Transfer 111 KB
Unused 54%
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 362ms
Transfer 156 KB
Unused 40%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 361ms
Transfer 136 KB
Unused 45%
Monthly Cost $5/mo
Hotjar
Session Replay
Costly
Execution 214ms
Transfer 57 KB
Unused 67%
Monthly Cost $3/mo
js-agent.newrelic.com
Other
Optional
Execution 193ms
Transfer 30 KB
Monthly Cost $3/mo
www.nobelprize.org
Other
Optional
Execution 99ms
Transfer 3 KB
Monthly Cost $1/mo
OneTrust
Consent
Essential
Execution 58ms
Transfer 9 KB
Monthly Cost $1/mo
www.nobelprize.org
Other
Optional
Execution 52ms
Transfer 30 KB
Unused 69%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.nobelprize.org adds 1213ms and costs ~$16/month
  • Unattributable adds 493ms and costs ~$7/month
  • Google Tag Manager adds 362ms and costs ~$5/month
  • Google Tag Manager adds 361ms and costs ~$5/month
  • Hotjar adds 214ms and costs ~$3/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

www.nobelprize.org takes 1213ms 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

Unattributable takes 493ms 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

54% of OneTrust'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

Google Tag Manager takes 362ms 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

Google Tag Manager takes 361ms 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

Hotjar takes 214ms 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

67% of Hotjar'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

69% of www.nobelprize.org'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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