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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
59
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

2.26 s

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

5.62 s

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

96 ms

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

0.028

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

3.83 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.

5.63 s

Page Load Progression

841 ms
1.7 s
2.5 s
3.4 s
4.2 s
5.0 s
5.9 s
6.7 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
30.1 MB transferred, 69 requests
FIX
30.1 MB transferred, 69 requests
Critical::
Page weighs 28.1 MB (30.1 MB transferred)
Warning::
Images are 7.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 7.0 MB
Warning::
JavaScript is 959 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 959 KB
Info::
Fonts are 537 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 537 KB
Info::
69 HTTP requests
Info::
Estimated 6.3 g CO2 per page load
30.1 MB / 2.4 MB budget
30.1 MB transferred
69 requests
6.3 g CO2 per page load
Other 21.3 MiB 71%
Images 7.0 MiB 23%
JavaScript 959.0 KiB 3%
Fonts 536.6 KiB 2%
Other 127.8 KiB 0%
CSS 105.4 KiB 0%
HTML 39.9 KiB 0%
Other 5.1 KiB 0%
Other 2.4 KiB 0%
Other 561 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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 (30.1 MiB of 30.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
17 scripts, 386 KB unused
FIX
17 scripts, 386 KB unused
Warning::
https://cdn.vanderbilt.edu/vu-futurevu/assets/vu.j...: 110 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MH8...: 64 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Q8Z6...: 62 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.hu-manity.co/hu-consent.min.js: 43 KB unused (60%)
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: 386 KB
386 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.vanderbilt.edu/vu-futurevu/assets/vu.js?ver=20260323166 KB110 KB (67%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MH87FL186 KB64 KB (35%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-Q8Z61J6QLT&cx=c&gtm=4e64h1156 KB62 KB (40%)✓3rd
https://cdn.hu-manity.co/hu-consent.min.js77 KB43 KB (60%)✓3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js57 KB38 KB (67%)✓3rd
https://connect.facebook.net/en_US/fbevents.js97 KB37 KB (39%)✓3rd
https://cdn.hu-manity.co/hu-display.min.js80 KB32 KB (39%)✓3rd
https://www.vanderbilt.edu/wp-content/themes/anchordown-futurevu/library/scripts/home-topper-video-controls.js?ver=1.01 KB—✓3rd
https://www.vanderbilt.edu/wp-content/plugins/page-links-to/dist/new-tab.js?ver=3.3.713 KB—✓3rd
https://www.vanderbilt.edu/wp-content/themes/anchordown-futurevu/library/scripts/story-list.js?ver=1.06 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

D
Page Weight Inventory
Action
69 resources · 30.1 MB · 386 KB savings available
FIX
69 resources · 30.1 MB · 386 KB savings available
Warning::
Page weight 29.1 MB over 1MB target
Got: 30.1 MB Expected: ≤ 1 MB
Info::
~386 KB of savings available
Warning::
68 third-party resources (100% of weight)
Info::
14 resources over 200KB
69 resources · 30.1 MiB · 68 third-party 29.1 MiB over 1MB target
Media 71% · 21.3 MiB
Image 23% · 7.0 MiB
JavaScript 3% · 959.0 KiB
Font 2% · 536.6 KiB
Other 0% · 133.7 KiB
CSS 0% · 105.4 KiB
Document 0% · 39.9 KiB

~386.3 KiB of savings available

Remove unused JavaScript: 386.3 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.

C
Image Optimization
Action
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Warning::
https://www.vanderbilt.edu/wp-content/uploads/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.vanderbilt.edu/wp-content/uploads/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.vanderbilt.edu/wp-content/uploads/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.vanderbilt.edu/wp-content/uploads/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.vanderbilt.edu/wp-content/uploads/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.vanderbilt.edu/wp-content/uploads/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.vanderbilt.edu/wp-content/uploads/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
22 images 7.0 MB
0 oversized -0 KB
22 legacy format
7 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

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

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

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 Execution Cost
Action
1296ms total JS execution
REVIEW
1296ms total JS execution
Warning::
Unattributable: 361ms CPU time
Warning::
https://www.vanderbilt.edu/: 350ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-MH8...: 156ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-Q8Z6...: 150ms CPU time
Info::
https://cdn.vanderbilt.edu/vu-futurevu/assets/vu.j...: 147ms CPU time
Warning::
Third-party scripts: 1296ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Other 32% Style & Layout 15% Script Parsing & Compilation 10%
ScriptTotalScriptingParse/CompileParty
Unattributable361ms5ms0ms3rd
https://www.vanderbilt.edu/350ms4ms1ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MH87FL156ms130ms23ms3rd
https://www.googletagmanager.com/gtag/js?id=G-Q8Z61J6QLT&cx=c&gtm=4e64h1150ms92ms57ms3rd
https://cdn.vanderbilt.edu/vu-futurevu/assets/vu.js?ver=20260323147ms89ms19ms3rd
https://cdn.hu-manity.co/hu-banner.min.js83ms53ms5ms3rd
https://connect.facebook.net/en_US/fbevents.js51ms37ms13ms3rd
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
11 fonts (537 KB)
PASS
11 fonts (537 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

11

537 KB total

Render-blocking

0

of 11

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 FCP 2.3 s LCP 5.6 shttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/webfonts/fa-solid-900.woff2 — 77.0 KiB — 25 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/webfonts/fa-brands-400.woff2 — 75.7 KiB — 18 ms — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Academica/complete/AcademicaMedium.woff2AcademicaMedium.woff2 https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Academica/complete/AcademicaMedium.woff2 — 0 B — 1.1 s — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Staff/complete/StaffXXCondensed-SemiBold.woff2StaffXXCondensed-SemiBo... https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Staff/complete/StaffXXCondensed-SemiBold.woff2 — 27.6 KiB — 1.1 s — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Theinhardt/complete/Theinhardt-Regular.woff2Theinhardt-Regular.woff2 https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Theinhardt/complete/Theinhardt-Regular.woff2 — 50.2 KiB — 907 ms — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Academica/complete/AcademicaLight.woff2AcademicaLight.woff2 https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Academica/complete/AcademicaLight.woff2 — 43.5 KiB — 1.1 s — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Theinhardt/complete/Theinhardt-Light.woff2Theinhardt-Light.woff2 https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Theinhardt/complete/Theinhardt-Light.woff2 — 49.5 KiB — 1.0 s — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/JJannon/complete/JJannon-Display-Light.woff2JJannon-Display-Light.w... https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/JJannon/complete/JJannon-Display-Light.woff2 — 81.2 KiB — 846 ms — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Theinhardt/complete/Theinhardt-Medium.woff2Theinhardt-Medium.woff2 https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Theinhardt/complete/Theinhardt-Medium.woff2 — 50.5 KiB — 664 ms — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/JJannon/complete/JJannon-Display-Regular.woff2JJannon-Display-Regular... https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/JJannon/complete/JJannon-Display-Regular.woff2 — 81.4 KiB — 984 ms — font-display: swaphttps://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Academica/complete/AcademicaMedium.woffAcademicaMedium.woff https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Academica/complete/AcademicaMedium.woff — 0 B — 169 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 77 KB
Load time 25 ms
Start 1.7 s
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 76 KB
Load time 18 ms
Start 1.7 s
Risk FOUT — text flashes from fallback to web font
AcademicaMedium.woff2 woff2 swap
Size 0 KB
Load time 1.1 s
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
StaffXXCondensed-SemiBo... woff2 swap
Size 28 KB
Load time 1.1 s
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
Theinhardt-Regular.woff2 woff2 swap
Size 50 KB
Load time 907 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
AcademicaLight.woff2 woff2 swap
Size 44 KB
Load time 1.1 s
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
Theinhardt-Light.woff2 woff2 swap
Size 50 KB
Load time 1.0 s
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
JJannon-Display-Light.w... woff2 swap
Size 81 KB
Load time 846 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
Theinhardt-Medium.woff2 woff2 swap
Size 51 KB
Load time 664 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
JJannon-Display-Regular... woff2 swap
Size 81 KB
Load time 984 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
AcademicaMedium.woff woff swap
Size 0 KB
Load time 169 ms
Start 3.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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
69 requests over 4425ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.3 s LCP 5.6 shttps://vanderbilt.edu// https://vanderbilt.edu/ — 302 — 247 B — 894 ms — h2https://www.vanderbilt.edu/www.vanderbilt.edu/ https://www.vanderbilt.edu/ — 200 — 39.9 KiB — 26 ms — h2https://cdn.hu-manity.co/hu-banner.min.jscdn.hu-manity.co/hu-banner.min.js https://cdn.hu-manity.co/hu-banner.min.js — 200 — 44.6 KiB — 215 ms — h2https://www.vanderbilt.edu/wp-includes/css/dist/block-library/style.min.css?ver=6.1.10www.vanderbilt.edu/wp-includes/css/... https://www.vanderbilt.edu/wp-includes/css/dist/block-library/style.min.css?ver=6.1.10 — 200 — 11.9 KiB — 34 ms — h2https://www.vanderbilt.edu/wp-includes/css/classic-themes.min.css?ver=1www.vanderbilt.edu/wp-includes/css/... https://www.vanderbilt.edu/wp-includes/css/classic-themes.min.css?ver=1 — 200 — 655 B — 26 ms — h2https://cdn.vanderbilt.edu/vu-futurevu/assets/vu.css?ver=20260323cdn.vanderbilt.edu/vu-futurevu/asse... https://cdn.vanderbilt.edu/vu-futurevu/assets/vu.css?ver=20260323 — 200 — 78.1 KiB — 963 ms — h2https://www.vanderbilt.edu/wp-content/themes/anchordown-futurevu/style.css?ver=1.0.0www.vanderbilt.edu/wp-content/theme... https://www.vanderbilt.edu/wp-content/themes/anchordown-futurevu/style.css?ver=1.0.0 — 200 — 997 B — 25 ms — h2https://www.vanderbilt.edu/wp-content/themes/anchordown-futurevu-child-big-vanderbilt/style.css?ver=1.0.3www.vanderbilt.edu/wp-content/theme... https://www.vanderbilt.edu/wp-content/themes/anchordown-futurevu-child-big-vanderbilt/style.css?ver=1.0.3 — 200 — 2.9 KiB — 25 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css?ver=1.0.0cdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css?ver=1.0.0 — 200 — 10.9 KiB — 35 ms — h3https://www.vanderbilt.edu/wp-content/uploads/sites/3/2026/03/06ae58bc640de4d363cb2a782e499f62-1800x1200-c-default.jpgwww.vanderbilt.edu/wp-content/uploa... https://www.vanderbilt.edu/wp-content/uploads/sites/3/2026/03/06ae58bc640de4d363cb2a782e499f62-1800x1200-c-default.jpg — 200 — 309.6 KiB — 41 ms — h2https://www.vanderbilt.edu/wp-content/uploads/sites/3/2021/07/person-book-library-1-1800x1200-c-default.jpegwww.vanderbilt.edu/wp-content/uploa... https://www.vanderbilt.edu/wp-content/uploads/sites/3/2021/07/person-book-library-1-1800x1200-c-default.jpeg — 200 — 281.8 KiB — 64 ms — h2https://www.vanderbilt.edu/wp-content/uploads/sites/3/2026/03/9af6eb1733819344a3809c99f9da6a0b-1800x1200-c-default.jpgwww.vanderbilt.edu/wp-content/uploa... https://www.vanderbilt.edu/wp-content/uploads/sites/3/2026/03/9af6eb1733819344a3809c99f9da6a0b-1800x1200-c-default.jpg — 200 — 254.7 KiB — 43 ms — h2https://www.vanderbilt.edu/wp-content/uploads/sites/3/2026/03/d9a927204eb7ef7ac806f61f4dedaa67-1800x1200-c-default.jpegwww.vanderbilt.edu/wp-content/uploa... https://www.vanderbilt.edu/wp-content/uploads/sites/3/2026/03/d9a927204eb7ef7ac806f61f4dedaa67-1800x1200-c-default.jpeg — 200 — 192.6 KiB — 33 ms — h2https://www.vanderbilt.edu/wp-content/uploads/sites/3/2026/03/e37927b196c2a0d506403eda4e28f809-1800x1200-c-default.jpgwww.vanderbilt.edu/wp-content/uploa... https://www.vanderbilt.edu/wp-content/uploads/sites/3/2026/03/e37927b196c2a0d506403eda4e28f809-1800x1200-c-default.jpg — 200 — 571.3 KiB — 63 ms — h2https://www.vanderbilt.edu/wp-includes/js/jquery/jquery.min.js?ver=3.6.1www.vanderbilt.edu/wp-includes/js/j... https://www.vanderbilt.edu/wp-includes/js/jquery/jquery.min.js?ver=3.6.1 — 200 — 31.0 KiB — 51 ms — h2https://www.vanderbilt.edu/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.3.2www.vanderbilt.edu/wp-includes/js/j... https://www.vanderbilt.edu/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.3.2 — 200 — 4.4 KiB — 8 ms — h2https://cdn.vanderbilt.edu/vu-futurevu/assets/vu.js?ver=20260323cdn.vanderbilt.edu/vu-futurevu/asse... 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h3https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/webfonts/fa-brands-400.woff2cdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/webfonts/fa-brands-400.woff2 — 200 — 75.7 KiB — 18 ms — h3https://transactional-api.hu-manity.co/api/transactional/session/savetransactional-api.hu-manity.co/api/... https://transactional-api.hu-manity.co/api/transactional/session/save — 200 — 451 B — 171 ms — h2https://www.facebook.com/tr/?id=209898002704302&ev=PageView&dl=https%3A%2F%2Fwww.vanderbilt.edu%2F&rl=&if=false&ts=1776803024979&sw=800&sh=600&v=2.9.303&r=stable&a=tmSimo-GTM-WebTemplate&ec=0&o=12316&fbp=fb.1.1776803024978.197075601429050377&ler=empty&cdl=API_unavailable&it=1776803024743&coo=false&tm=1&expv2[0]=pl0&expv2[1]=el2&expv2[2]=bc1&expv2[3]=ra0&expv2[4]=rp0&expv2[5]=im0&expv2[6]=hf0&expv2[7]=pt1&rqm=GETwww.facebook.com/tr/?id=20989800270... https://www.facebook.com/tr/?id=209898002704302&ev=PageView&dl=https%3A%2F%2Fwww.vanderbilt.edu%2F&rl=&if=false&ts=1776803024979&sw=800&sh=600&v=2.9.303&r=stable&a=tmSimo-GTM-WebTemplate&ec=0&o=12316&fbp=fb.1.1776803024978.197075601429050377&ler=empty&cdl=API_unavailable&it=1776803024743&coo=false&tm=1&expv2[0]=pl0&expv2[1]=el2&expv2[2]=bc1&expv2[3]=ra0&expv2[4]=rp0&expv2[5]=im0&expv2[6]=hf0&expv2[7]=pt1&rqm=GET — 200 — 19 B — 10 ms — h3https://www.facebook.com/privacy_sandbox/pixel/register/trigger/?id=209898002704302&ev=PageView&dl=https%3A%2F%2Fwww.vanderbilt.edu%2F&rl=&if=false&ts=1776803024979&sw=800&sh=600&v=2.9.303&r=stable&a=tmSimo-GTM-WebTemplate&ec=0&o=12316&fbp=fb.1.1776803024978.197075601429050377&ler=empty&cdl=API_unavailable&it=1776803024743&coo=false&tm=1&expv2[0]=pl0&expv2[1]=el2&expv2[2]=bc1&expv2[3]=ra0&expv2[4]=rp0&expv2[5]=im0&expv2[6]=hf0&expv2[7]=pt1&rqm=FGETwww.facebook.com/privacy_sandbox/pi... https://www.facebook.com/privacy_sandbox/pixel/register/trigger/?id=209898002704302&ev=PageView&dl=https%3A%2F%2Fwww.vanderbilt.edu%2F&rl=&if=false&ts=1776803024979&sw=800&sh=600&v=2.9.303&r=stable&a=tmSimo-GTM-WebTemplate&ec=0&o=12316&fbp=fb.1.1776803024978.197075601429050377&ler=empty&cdl=API_unavailable&it=1776803024743&coo=false&tm=1&expv2[0]=pl0&expv2[1]=el2&expv2[2]=bc1&expv2[3]=ra0&expv2[4]=rp0&expv2[5]=im0&expv2[6]=hf0&expv2[7]=pt1&rqm=FGET — 200 — 196 B — 275 ms — h3https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Academica/complete/AcademicaMedium.woff2cdn.vanderbilt.edu/vu-futurevu/stat... https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Academica/complete/AcademicaMedium.woff2 — -1 — 0 B — 1.1 s — https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Staff/complete/StaffXXCondensed-SemiBold.woff2cdn.vanderbilt.edu/vu-futurevu/stat... https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Staff/complete/StaffXXCondensed-SemiBold.woff2 — 200 — 27.6 KiB — 1.1 s — 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https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/JJannon/complete/JJannon-Display-Light.woff2 — 200 — 81.2 KiB — 846 ms — h2https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Theinhardt/complete/Theinhardt-Medium.woff2cdn.vanderbilt.edu/vu-futurevu/stat... https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/Theinhardt/complete/Theinhardt-Medium.woff2 — 200 — 50.5 KiB — 664 ms — h2https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/JJannon/complete/JJannon-Display-Regular.woff2cdn.vanderbilt.edu/vu-futurevu/stat... https://cdn.vanderbilt.edu/vu-futurevu/static/fonts/JJannon/complete/JJannon-Display-Regular.woff2 — 200 — 81.4 KiB — 984 ms — h2https://cdn.hu-manity.co/hu-display.min.jscdn.hu-manity.co/hu-display.min.js https://cdn.hu-manity.co/hu-display.min.js — 200 — 80.4 KiB — 20 ms — h2https://cdn.hu-manity.co/hu-consent.min.jscdn.hu-manity.co/hu-consent.min.js https://cdn.hu-manity.co/hu-consent.min.js — 200 — 77.2 KiB — 23 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 1296ms · 689KB · $5/mo
Unattributable
Other
Costly
Execution 361ms
Transfer 0 KB
Monthly Cost $1/mo
www.vanderbilt.edu
Other
Costly
Execution 350ms
Transfer 40 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 156ms
Transfer 186 KB
Unused 35%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 150ms
Transfer 156 KB
Unused 40%
Monthly Cost $1/mo
cdn.vanderbilt.edu
Other
Optional
Execution 147ms
Transfer 166 KB
Unused 67%
Monthly Cost $1/mo
cdn.hu-manity.co
Other
Optional
Execution 83ms
Transfer 45 KB
Monthly Cost $0/mo
Facebook Pixel
Advertising
Optional
Execution 51ms
Transfer 97 KB
Unused 39%
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • Unattributable adds 361ms and costs ~$1/month
  • www.vanderbilt.edu adds 350ms and costs ~$1/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

Unattributable 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

www.vanderbilt.edu takes 350ms 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 cdn.vanderbilt.edu'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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