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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
2
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
98
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.
75
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.

493 ms

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

794 ms

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

26 ms

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

0.000

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

493 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.24 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
15
8 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
84% third-party, 0 ms blocking
FIX
84% third-party, 0 ms blocking
Warning::
Third-party code accounts for 84% of page weight (714.7 KiB of 848.9 KiB)
Info::
Third-party blocking time is low (0 ms)
16%
84%
First-party Third-party
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, must-revalidate

DirectiveValueMeaning
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
B
Image Optimization
5 images, 0 KB saveable
REVIEW
5 images, 0 KB saveable
Warning::
https://images.ctfassets.net/1ny4yoiyrqia/pRAV2OvC... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/1ny4yoiyrqia/7hrdSgNX... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
5 images 332 KB
0 oversized -0 KB
3 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Bundles
5 scripts, 118 KB unused
REVIEW
5 scripts, 118 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TN5...: 64 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TB9L...: 54 KB unused (32%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.aad.org/js/main.js?cb=20191115: unminified — 2 KB could be saved
Info::
Total unused JavaScript: 118 KB
118 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-TN5D87V149 KB64 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-TB9LD0R9B6&cx=c&gtm=4e64h1171 KB54 KB (32%)✓3rd
https://assets.aad.org/js/RegModal.js?am2026.12 KB—✓3rd
https://assets.aad.org/js/main.js?cb=201911158 KB—✗3rd
https://googleads.g.doubleclick.net/pagead/viewthroughconversion/11481519194/?random=1776813151582&cv=11&fst=1776813151582&bg=ffffff&guid=ON&async=1&en=gtag.config&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&u_w=800&u_h=600&url=https%3A%2F%2Faad.org%2F&rcb=18&frm=0&tiba=American%20Academy%20of%20Dermatology&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=85915425.1776813151&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&rfmt=3&fmt=42 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

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

Green Hosting

No green hosting detected

A
Page Weight Budget
849 KB transferred, 20 requests
PASS
849 KB transferred, 20 requests
Info::
Page weighs 2.4 MB (849 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.17 g CO2 per page load
849 KB / 2.4 MB budget
849 KB transferred
20 requests
0.17 g CO2 per page load
Images 331.9 KiB 39%
JavaScript 331.9 KiB 39%
Other 129.9 KiB 15%
CSS 49.8 KiB 6%
HTML 4.3 KiB 1%
Other 605 B 0%
Other 552 B 0%
0 2.4 MB 4.9 MB
Under budget
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
286ms total JS execution
PASS
286ms total JS execution
Info::
https://www.googletagmanager.com/gtag/js?id=G-TB9L...: 106ms CPU time
Info::
Unattributable: 101ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-TN5...: 79ms CPU time
Warning::
Third-party scripts: 286ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 25% Style & Layout 13% Script Parsing & Compilation 10%
ScriptTotalScriptingParse/CompileParty
https://www.googletagmanager.com/gtag/js?id=G-TB9LD0R9B6&cx=c&gtm=4e64h1106ms89ms16ms3rd
Unattributable101ms2ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TN5D87V79ms63ms14ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
20 resources · 849 KB · 118 KB savings available
PASS
20 resources · 849 KB · 118 KB savings available
Info::
Within 1MB page-weight target
Got: 849 KB
Info::
~118 KB of savings available
Warning::
17 third-party resources (84% of weight)
20 resources · 848.9 KiB · 17 third-party Within 1MB page-weight target
Image 54% · 461.8 KiB
JavaScript 39% · 331.9 KiB
CSS 6% · 49.8 KiB
Document 1% · 4.4 KiB
Other 0% · 1.1 KiB

~118.1 KiB of savings available

Remove unused JavaScript: 118.1 KiB
Network Waterfall
20 requests over 513ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 493 ms LCP 794 mshttps://aad.org// https://aad.org/ — 200 — 4.3 KiB — 46 ms — h2https://assets.aad.org/css/main.css?v1assets.aad.org/css/main.css?v1 https://assets.aad.org/css/main.css?v1 — 200 — 46.3 KiB — 29 ms — h2https://images.ctfassets.net/1ny4yoiyrqia/pRAV2OvC0sw4FB33wO76q/b5fedcfa5a10954ed7f45a4e1df8ed40/member-aad-home-950x446.png?fm=webp&w=950images.ctfassets.net/1ny4yoiyrqia/p... https://images.ctfassets.net/1ny4yoiyrqia/pRAV2OvC0sw4FB33wO76q/b5fedcfa5a10954ed7f45a4e1df8ed40/member-aad-home-950x446.png?fm=webp&w=950 — 200 — 198.8 KiB — 28 ms — h2https://images.ctfassets.net/1ny4yoiyrqia/7hrdSgNXF0H6vnxPpPcqXP/d90e675c7699baf5b534560117fe2ddb/people2.jpg?fm=webp&w=950images.ctfassets.net/1ny4yoiyrqia/7... https://images.ctfassets.net/1ny4yoiyrqia/7hrdSgNXF0H6vnxPpPcqXP/d90e675c7699baf5b534560117fe2ddb/people2.jpg?fm=webp&w=950 — 200 — 32.6 KiB — 17 ms — h2https://assets.aad.org/assets/images/AM2026Banner.pngassets.aad.org/assets/images/AM2026... https://assets.aad.org/assets/images/AM2026Banner.png — 200 — 100.4 KiB — 12 ms — h2https://assets.aad.org/js/RegModal.js?am2026.1assets.aad.org/js/RegModal.js?am202... https://assets.aad.org/js/RegModal.js?am2026.1 — 200 — 1.5 KiB — 6 ms — h2https://assets.aad.org/js/main.js?cb=20191115assets.aad.org/js/main.js?cb=201911... https://assets.aad.org/js/main.js?cb=20191115 — 200 — 8.1 KiB — 178 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-TN5D87Vwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-TN5D87V — 200 — 149.4 KiB — 69 ms — h2https://assets.aad.org/css/print.cssassets.aad.org/css/print.css https://assets.aad.org/css/print.css — 200 — 3.6 KiB — 7 ms — h2https://aad.org/assets/svg-sprite.svg/assets/svg-sprite.svg https://aad.org/assets/svg-sprite.svg — 200 — 125.7 KiB — 11 ms — h2https://www.googletagmanager.com/gtag/js?id=G-TB9LD0R9B6&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-TB9LD0R9B6&cx=c&gtm=4e64h1 — 200 — 170.7 KiB — 55 ms — h2https://www.google.com/ccm/collect?rcb=18&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Faad.org%2F&scrsrc=www.googletagmanager.com&rnd=1766014578.1776813151&dt=American%20Academy%20of%20Dermatology&auid=85915425.1776813151&navt=n&npa=0&ep.ads_data_redaction=0&gtm=45He64h1v9123674680za200zd9123674680xea&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616986~115938466~115938469~117266401&apve=1&apvf=f&apvc=1&tft=1776813151431&tfd=268www.google.com/ccm/collect?rcb=18&f... https://www.google.com/ccm/collect?rcb=18&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Faad.org%2F&scrsrc=www.googletagmanager.com&rnd=1766014578.1776813151&dt=American%20Academy%20of%20Dermatology&auid=85915425.1776813151&navt=n&npa=0&ep.ads_data_redaction=0&gtm=45He64h1v9123674680za200zd9123674680xea&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616986~115938466~115938469~117266401&apve=1&apvf=f&apvc=1&tft=1776813151431&tfd=268 — 200 — 21 B — 38 ms — h3https://analytics.google.com/g/collect?v=2&tid=G-TB9LD0R9B6&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680&_p=1776813151261&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=2044005357.1776813152&frm=0&pscdl=noapi&rcb=18&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115616985~115938466~115938468~117266400~117384406&sid=1776813151&sct=1&seg=0&dl=https%3A%2F%2Faad.org%2F&dt=American%20Academy%20of%20Dermatology&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=414analytics.google.com/g/collect?v=2&... https://analytics.google.com/g/collect?v=2&tid=G-TB9LD0R9B6&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680&_p=1776813151261&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=2044005357.1776813152&frm=0&pscdl=noapi&rcb=18&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115616985~115938466~115938468~117266400~117384406&sid=1776813151&sct=1&seg=0&dl=https%3A%2F%2Faad.org%2F&dt=American%20Academy%20of%20Dermatology&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=414 — 204 — 543 B — 33 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-TB9LD0R9B6&cid=2044005357.1776813152&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680&rcb=18&aip=1&dma=0&gcd=13l3l3l3l1l1&npa=0&frm=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-TB9LD0R9B6&cid=2044005357.1776813152&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680&rcb=18&aip=1&dma=0&gcd=13l3l3l3l1l1&npa=0&frm=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406 — 204 — 552 B — 39 ms — h2https://googleads.g.doubleclick.net/pagead/viewthroughconversion/11481519194/?random=1776813151582&cv=11&fst=1776813151582&bg=ffffff&guid=ON&async=1&en=gtag.config&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&u_w=800&u_h=600&url=https%3A%2F%2Faad.org%2F&rcb=18&frm=0&tiba=American%20Academy%20of%20Dermatology&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=85915425.1776813151&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&rfmt=3&fmt=4googleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/viewthroughconversion/11481519194/?random=1776813151582&cv=11&fst=1776813151582&bg=ffffff&guid=ON&async=1&en=gtag.config&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&u_w=800&u_h=600&url=https%3A%2F%2Faad.org%2F&rcb=18&frm=0&tiba=American%20Academy%20of%20Dermatology&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=85915425.1776813151&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&rfmt=3&fmt=4 — 200 — 2.2 KiB — 42 ms — h3https://www.google.com/rmkt/collect/11481519194/?random=1776813151582&cv=11&fst=1776813151582&fmt=8&bg=ffffff&guid=ON&async=1&en=gtag.config&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&u_w=800&u_h=600&url=https%3A%2F%2Faad.org%2F&rcb=18&frm=0&tiba=American%20Academy%20of%20Dermatology&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=85915425.1776813151&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&gcp=5www.google.com/rmkt/collect/1148151... https://www.google.com/rmkt/collect/11481519194/?random=1776813151582&cv=11&fst=1776813151582&fmt=8&bg=ffffff&guid=ON&async=1&en=gtag.config&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&u_w=800&u_h=600&url=https%3A%2F%2Faad.org%2F&rcb=18&frm=0&tiba=American%20Academy%20of%20Dermatology&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=85915425.1776813151&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&gcp=5 — 200 — 20 B — 25 ms — h3https://www.googletagmanager.com/td?id=G-TB9LD0R9B6&v=3&t=t&pid=472543021&gtm=45je64h1v888719910za20gzb9123674680zd9123674680&seq=1&exp=0~115616985~115938466~115938468~117266400~117384406&dl=aad.org%2F&tdp=G-TB9LD0R9B6;88719910;1;6;0&frm=0&rtg=123674680&slo=2&hlo=2&lst=1&pcid=123674680&bt=0&ct=3&z=0www.googletagmanager.com/td?id=G-TB... https://www.googletagmanager.com/td?id=G-TB9LD0R9B6&v=3&t=t&pid=472543021&gtm=45je64h1v888719910za20gzb9123674680zd9123674680&seq=1&exp=0~115616985~115938466~115938468~117266400~117384406&dl=aad.org%2F&tdp=G-TB9LD0R9B6;88719910;1;6;0&frm=0&rtg=123674680&slo=2&hlo=2&lst=1&pcid=123674680&bt=0&ct=3&z=0 — 204 — 18 B — 20 ms — h3https://www.google.com/ccm/collect?rcb=18&frm=0&en=page_view&dl=https%3A%2F%2Faad.org%2F&scrsrc=www.googletagmanager.com&rnd=1766014578.1776813151&dt=American%20Academy%20of%20Dermatology&auid=85915425.1776813151&navt=n&npa=0&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&apve=1&apvf=f&apvc=0&tids=AW-11481519194&tid=AW-11481519194&tft=1776813151601&tfd=437www.google.com/ccm/collect?rcb=18&f... https://www.google.com/ccm/collect?rcb=18&frm=0&en=page_view&dl=https%3A%2F%2Faad.org%2F&scrsrc=www.googletagmanager.com&rnd=1766014578.1776813151&dt=American%20Academy%20of%20Dermatology&auid=85915425.1776813151&navt=n&npa=0&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&apve=1&apvf=f&apvc=0&tids=AW-11481519194&tid=AW-11481519194&tft=1776813151601&tfd=437 — 200 — 21 B — 30 ms — h3https://www.google.com/pagead/1p-user-list/11481519194/?random=1776813151582&cv=11&fst=1776812400000&bg=ffffff&guid=ON&async=1&en=gtag.config&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&u_w=800&u_h=600&url=https%3A%2F%2Faad.org%2F&rcb=18&frm=0&tiba=American%20Academy%20of%20Dermatology&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=85915425.1776813151&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&rfmt=3&fmt=3&is_vtc=1&cid=CAQSyAEABaugfdCc8I2DM5FJs--iRW1G9d7SH2FVbsJjukkIbAaX2_CZEWuhF1tnTfi3UE_fn5eY2NYjPIdHIsq6H9rGGPFdgxDISmc95RBMFn8-_uiWEN_EUG2ixvqkQxnbISeBRKCVbxZTxlgarHnG3uaTY-VgTSM5N089NT1W6Q7Zj82PfcaguqSVyH_a2LjdPek5khsLozAi7PH3qNVA7JGO0Ep_flMfopDv8gsJewH0riJkqkCKDAAUGS63JKKgO227uhjxTmZapA&random=3851036349&rmt_tld=0&ipr=ywww.google.com/pagead/1p-user-list/... https://www.google.com/pagead/1p-user-list/11481519194/?random=1776813151582&cv=11&fst=1776812400000&bg=ffffff&guid=ON&async=1&en=gtag.config&gtm=45je64h1v888719910z89123674680za20gzb9123674680zd9123674680xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938468~117266400~117384406&u_w=800&u_h=600&url=https%3A%2F%2Faad.org%2F&rcb=18&frm=0&tiba=American%20Academy%20of%20Dermatology&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=85915425.1776813151&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&rfmt=3&fmt=3&is_vtc=1&cid=CAQSyAEABaugfdCc8I2DM5FJs--iRW1G9d7SH2FVbsJjukkIbAaX2_CZEWuhF1tnTfi3UE_fn5eY2NYjPIdHIsq6H9rGGPFdgxDISmc95RBMFn8-_uiWEN_EUG2ixvqkQxnbISeBRKCVbxZTxlgarHnG3uaTY-VgTSM5N089NT1W6Q7Zj82PfcaguqSVyH_a2LjdPek5khsLozAi7PH3qNVA7JGO0Ep_flMfopDv8gsJewH0riJkqkCKDAAUGS63JKKgO227uhjxTmZapA&random=3851036349&rmt_tld=0&ipr=y — 200 — 64 B — 27 ms — h3https://aad.org/favicon.ico/favicon.ico https://aad.org/favicon.ico — 200 — 4.2 KiB — 5 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 286ms · 320KB · $4/mo
Google Tag Manager
Tag Manager
Optional
Execution 106ms
Transfer 171 KB
Unused 32%
Monthly Cost $1/mo
Unattributable
Other
Optional
Execution 101ms
Transfer 0 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 79ms
Transfer 149 KB
Unused 43%
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

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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