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https://wilsoncenter.org

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
89
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
69
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.

1.23 s

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

1.80 s

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

2 ms

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

0.002

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

1.25 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

443 ms
886 ms
1.3 s
1.8 s
2.2 s
2.7 s
3.1 s
3.5 s
Checks
15
6 PASS 4 REVIEW 3 FIX
D
Page Weight Budget
Action
2.1 MB transferred, 44 requests
FIX
2.1 MB transferred, 44 requests
Info::
Page weighs 3.9 MB (2.1 MB transferred)
Warning::
JavaScript is 569 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 569 KB
Info::
44 HTTP requests
Info::
Estimated 0.44 g CO2 per page load
2.1 MB / 2.4 MB budget
2.1 MB transferred
44 requests
0.44 g CO2 per page load
Other 721.7 KiB 34%
Images 571.3 KiB 27%
JavaScript 568.9 KiB 27%
Fonts 91.7 KiB 4%
CSS 83.9 KiB 4%
HTML 68.9 KiB 3%
Other 26.5 KiB 1%
Other 1.3 KiB 0%
Other 839 B 0%
Other 685 B 0%
Other 553 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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 (2.1 MiB of 2.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
44 resources · 2.1 MB · 274 KB savings available
FIX
44 resources · 2.1 MB · 274 KB savings available
Warning::
Page weight 1.1 MB over 1MB target
Got: 2.1 MB Expected: ≤ 1 MB
Info::
~274 KB of savings available
Warning::
43 third-party resources (100% of weight)
Info::
2 resources over 200KB
44 resources · 2.1 MiB · 43 third-party 1.1 MiB over 1MB target
Media 34% · 721.7 KiB
Image 28% · 596.8 KiB
JavaScript 27% · 568.9 KiB
Font 4% · 91.7 KiB
CSS 4% · 83.9 KiB
Document 3% · 69.2 KiB
Other 0% · 4.0 KiB

~274.1 KiB of savings available

Remove unused JavaScript: 274.1 KiB
B
Image Optimization
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Warning::
https://www.wilsoncenter.org/themes/custom/wilson/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11 images 571 KB
0 oversized -0 KB
3 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
9 scripts, 274 KB unused
REVIEW
9 scripts, 274 KB unused
Warning::
https://www.wilsoncenter.org/sites/default/files/j...: 100 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5DH...: 68 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-6MDY...: 68 KB unused (40%)
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.
Info::
Total unused JavaScript: 274 KB
274 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.wilsoncenter.org/sites/default/files/js/js_NhkY0YFPKR2jrO9moIIeTB3EbnhgSk5fUi_xiSlPEB8.js?scope=footer&delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBHXKM3OK8_P0IRQAa8wWHQ145 KB100 KB (69%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5DH9QL159 KB68 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-6MDYB7KP94&cx=c&gtm=4e64k0h1172 KB68 KB (40%)✓3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js57 KB38 KB (67%)✓3rd
https://www.wilsoncenter.org/sites/default/files/js/js_uM0_W3FzN5AQ00oLuoUkok5UXWZR25IXWihOhWsejXU.js?scope=header&delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBHXKM3OK8_P0IRQAa8wWHQ7 KB—✓3rd
https://snap.licdn.com/li.lms-analytics/insight.min.js19 KB—✓3rd
https://static.hotjar.com/c/hotjar-3668644.js?sv=76 KB—✓3rd
https://w.soundcloud.com/player/api.js4 KB—✓3rd
https://px4.ads.linkedin.com/collect?v=2&fmt=js&pid=4425052&time=1776894313404&url=https%3A%2F%2Fwww.wilsoncenter.org%2F&tm=gtmv2&e_ipv6=AQKS73LQLH5v2wAAAZ23J4RScMspDKebJDG2_Mnk7PeSbpfkLGQUyEd92Rm_oxC58EUfjOTo9EM1 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
495ms total JS execution
PASS
495ms total JS execution
Info::
https://www.wilsoncenter.org/sites/default/files/j...: 148ms CPU time
Info::
https://www.wilsoncenter.org/: 130ms CPU time
Info::
Unattributable: 88ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-5DH...: 71ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-6MDY...: 57ms CPU time
Warning::
Third-party scripts: 495ms (100% of total)

Main Thread Breakdown

Script Evaluation 35% Other 27% Style & Layout 24% Script Parsing & Compilation 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.wilsoncenter.org/sites/default/files/js/js_NhkY0YFPKR2jrO9moIIeTB3EbnhgSk5fUi_xiSlPEB8.js?scope=footer&delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBHXKM3OK8_P0IRQAa8wWHQ148ms37ms10ms3rd
https://www.wilsoncenter.org/130ms2ms0ms3rd
Unattributable88ms5ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5DH9QL71ms60ms10ms3rd
https://www.googletagmanager.com/gtag/js?id=G-6MDYB7KP94&cx=c&gtm=4e64k0h157ms46ms10ms3rd
A+
Font Loading
5 fonts (92 KB)
PASS
5 fonts (92 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

92 KB total

Render-blocking

0

of 5

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 FCP 1.2 s LCP 1.8 shttps://www.wilsoncenter.org/themes/custom/wilson/assets/fonts/icomoon.woff2?t3k0yiicomoon.woff2 https://www.wilsoncenter.org/themes/custom/wilson/assets/fonts/icomoon.woff2?t3k0yi — 6.6 KiB — 13 ms — font-display: swaphttps://use.typekit.net/af/46da36/00000000000000003b9acaf6/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/46da36/00000000000000003b9acaf6/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 26.4 KiB — 5 ms — font-display: swaphttps://use.typekit.net/af/ac1071/00000000000000003b9acafe/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n8&v=3l https://use.typekit.net/af/ac1071/00000000000000003b9acafe/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n8&v=3 — 26.3 KiB — 6 ms — font-display: swaphttps://www.wilsoncenter.org/themes/custom/wilson/assets/fonts/icomoon.woff2?t3k0yi=icomoon.woff2 https://www.wilsoncenter.org/themes/custom/wilson/assets/fonts/icomoon.woff2?t3k0yi= — 6.5 KiB — 4 ms — font-display: swaphttps://use.typekit.net/af/6d4bb2/00000000000000003b9acafc/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3l https://use.typekit.net/af/6d4bb2/00000000000000003b9acafc/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3 — 26.0 KiB — 5 ms — font-display: swap
icomoon.woff2 woff2 swap
Size 7 KB
Load time 13 ms
Start 328 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 26 KB
Load time 5 ms
Start 482 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 26 KB
Load time 6 ms
Start 482 ms
Risk FOUT — text flashes from fallback to web font
icomoon.woff2 woff2 swap
Size 6 KB
Load time 4 ms
Start 482 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 26 KB
Load time 5 ms
Start 482 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
44 requests over 1234ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.2 s LCP 1.8 shttps://wilsoncenter.org// https://wilsoncenter.org/ — 302 — 286 B — 313 ms — h2https://www.wilsoncenter.org/www.wilsoncenter.org/ https://www.wilsoncenter.org/ — 200 — 68.9 KiB — 8 ms — h2https://www.wilsoncenter.org/themes/custom/wilson/assets/fonts/icomoon.woff2?t3k0yiwww.wilsoncenter.org/themes/custom/... https://www.wilsoncenter.org/themes/custom/wilson/assets/fonts/icomoon.woff2?t3k0yi — 200 — 6.6 KiB — 13 ms — h2https://www.wilsoncenter.org/sites/default/files/css/css_pq7SoiNaNeHdCaQjKWCvLT1cVSebfqrJkCQnkOMFMkE.css?delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBOOTEotSdYori0tSc_WTEotTdcozc4rz8_RzU4uLE9NTi2F8CAUAGrAjAAwww.wilsoncenter.org/sites/default/... https://www.wilsoncenter.org/sites/default/files/css/css_pq7SoiNaNeHdCaQjKWCvLT1cVSebfqrJkCQnkOMFMkE.css?delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBOOTEotSdYori0tSc_WTEotTdcozc4rz8_RzU4uLE9NTi2F8CAUAGrAjAA — 200 — 4.4 KiB — 5 ms — h2https://use.typekit.net/xqj3oyw.cssuse.typekit.net/xqj3oyw.css https://use.typekit.net/xqj3oyw.css — 200 — 1.0 KiB — 62 ms — h2https://www.wilsoncenter.org/sites/default/files/css/css_0fWTpt4e0P_LocsucAvYqNuyTlSdmqUv_AzpLhtqZus.css?delta=2&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBOOTEotSdYori0tSc_WTEotTdcozc4rz8_RzU4uLE9NTi2F8CAUAGrAjAAwww.wilsoncenter.org/sites/default/... https://www.wilsoncenter.org/sites/default/files/css/css_0fWTpt4e0P_LocsucAvYqNuyTlSdmqUv_AzpLhtqZus.css?delta=2&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBOOTEotSdYori0tSc_WTEotTdcozc4rz8_RzU4uLE9NTi2F8CAUAGrAjAA — 200 — 678 B — 8 ms — h2https://use.typekit.net/waq7naz.cssuse.typekit.net/waq7naz.css https://use.typekit.net/waq7naz.css — 200 — 1.2 KiB — 62 ms — h2https://cloud.typenetwork.com/projects/3888/fontface.css/cloud.typenetwork.com/projects/3888... https://cloud.typenetwork.com/projects/3888/fontface.css/ — 200 — 1.2 KiB — 36 ms — h2https://www.wilsoncenter.org/sites/default/files/css/css_D-jhvRDu_XN7QWqzWUXOQuGZtnVzmAyt0YMgzLtLcf8.css?delta=5&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBOOTEotSdYori0tSc_WTEotTdcozc4rz8_RzU4uLE9NTi2F8CAUAGrAjAAwww.wilsoncenter.org/sites/default/... https://www.wilsoncenter.org/sites/default/files/css/css_D-jhvRDu_XN7QWqzWUXOQuGZtnVzmAyt0YMgzLtLcf8.css?delta=5&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBOOTEotSdYori0tSc_WTEotTdcozc4rz8_RzU4uLE9NTi2F8CAUAGrAjAA — 200 — 75.0 KiB — 17 ms — h2https://www.wilsoncenter.org/sites/default/files/js/js_uM0_W3FzN5AQ00oLuoUkok5UXWZR25IXWihOhWsejXU.js?scope=header&delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBHXKM3OK8_P0IRQAa8wWHQwww.wilsoncenter.org/sites/default/... https://www.wilsoncenter.org/sites/default/files/js/js_uM0_W3FzN5AQ00oLuoUkok5UXWZR25IXWihOhWsejXU.js?scope=header&delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBHXKM3OK8_P0IRQAa8wWHQ — 200 — 7.0 KiB — 7 ms — h2https://www.wilsoncenter.org/themes/custom/wilson/assets/images/footer-logo.svgwww.wilsoncenter.org/themes/custom/... https://www.wilsoncenter.org/themes/custom/wilson/assets/images/footer-logo.svg — 200 — 3.0 KiB — 4 ms — h2https://www.wilsoncenter.org/sites/default/files/js/js_NhkY0YFPKR2jrO9moIIeTB3EbnhgSk5fUi_xiSlPEB8.js?scope=footer&delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBHXKM3OK8_P0IRQAa8wWHQwww.wilsoncenter.org/sites/default/... https://www.wilsoncenter.org/sites/default/files/js/js_NhkY0YFPKR2jrO9moIIeTB3EbnhgSk5fUi_xiSlPEB8.js?scope=footer&delta=0&language=en&theme=wilson&include=eJxLLY1Pzs_PzkwFUrkFOZmJecmp-qlYBHXKM3OK8_P0IRQAa8wWHQ — 200 — 145.3 KiB — 22 ms — h2https://p.typekit.net/p.css?s=1&k=xqj3oyw&ht=tk&f=26034.26052.26053.26054.26056.26062&a=161428373&app=typekit&e=cssp.typekit.net/p.css?s=1&k=xqj3oyw&h... https://p.typekit.net/p.css?s=1&k=xqj3oyw&ht=tk&f=26034.26052.26053.26054.26056.26062&a=161428373&app=typekit&e=css — 200 — 172 B — 8 ms — h2https://p.typekit.net/p.css?s=1&k=waq7naz&ht=tk&f=10326.15815.26056.26060.26062.26063.31028.31030.31031&a=682332&app=typekit&e=cssp.typekit.net/p.css?s=1&k=waq7naz&h... https://p.typekit.net/p.css?s=1&k=waq7naz&ht=tk&f=10326.15815.26056.26060.26062.26063.31028.31030.31031&a=682332&app=typekit&e=css — 200 — 172 B — 6 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-5DH9QLwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-5DH9QL — 200 — 159.3 KiB — 183 ms — h2https://use.typekit.net/af/46da36/00000000000000003b9acaf6/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3use.typekit.net/af/46da36/000000000... https://use.typekit.net/af/46da36/00000000000000003b9acaf6/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 200 — 26.4 KiB — 5 ms — h2https://use.typekit.net/af/ac1071/00000000000000003b9acafe/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n8&v=3use.typekit.net/af/ac1071/000000000... https://use.typekit.net/af/ac1071/00000000000000003b9acafe/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n8&v=3 — 200 — 26.3 KiB — 6 ms — h2https://www.wilsoncenter.org/themes/custom/wilson/assets/fonts/icomoon.woff2?t3k0yi=www.wilsoncenter.org/themes/custom/... https://www.wilsoncenter.org/themes/custom/wilson/assets/fonts/icomoon.woff2?t3k0yi= — 200 — 6.5 KiB — 4 ms — h2https://use.typekit.net/af/6d4bb2/00000000000000003b9acafc/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3use.typekit.net/af/6d4bb2/000000000... 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https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&_ng=1&tid=G-6MDYB7KP94&cid=1097969516.1776894313&gtm=45je64k0h1v888893039z872583184za20gzb72583184zd72583184&rcb=17&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115616985~115938465~115938468~117266400~117512543~118463262&z=1923190463 — 200 — 408 B — 91 ms — h2https://px4.ads.linkedin.com/collect?v=2&fmt=js&pid=4425052&time=1776894313404&url=https%3A%2F%2Fwww.wilsoncenter.org%2F&tm=gtmv2&e_ipv6=AQKS73LQLH5v2wAAAZ23J4RScMspDKebJDG2_Mnk7PeSbpfkLGQUyEd92Rm_oxC58EUfjOTo9EMpx4.ads.linkedin.com/collect?v=2&fm... https://px4.ads.linkedin.com/collect?v=2&fmt=js&pid=4425052&time=1776894313404&url=https%3A%2F%2Fwww.wilsoncenter.org%2F&tm=gtmv2&e_ipv6=AQKS73LQLH5v2wAAAZ23J4RScMspDKebJDG2_Mnk7PeSbpfkLGQUyEd92Rm_oxC58EUfjOTo9EM — 200 — 694 B — 240 ms — h2https://www.wilsoncenter.org/themes/custom/wilson/assets/pwa/icons/favicon.icowww.wilsoncenter.org/themes/custom/... https://www.wilsoncenter.org/themes/custom/wilson/assets/pwa/icons/favicon.ico — 200 — 15.3 KiB — 5 ms — h2https://www.wilsoncenter.org/themes/custom/wilson/assets/pwa/icons/android-chrome-192x192.pngwww.wilsoncenter.org/themes/custom/... https://www.wilsoncenter.org/themes/custom/wilson/assets/pwa/icons/android-chrome-192x192.png — 200 — 10.2 KiB — 4 ms — h2
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 495ms · 546KB · €5/mo
www.wilsoncenter.org
Other
Optional
Execution 148ms
Transfer 145 KB
Unused 69%
Monthly Cost €2/mo
www.wilsoncenter.org
Other
Optional
Execution 130ms
Transfer 69 KB
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 88ms
Transfer 0 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 71ms
Transfer 159 KB
Unused 43%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 57ms
Transfer 172 KB
Unused 40%
Monthly Cost €1/mo

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

69% of www.wilsoncenter.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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