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https://utk.edu

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
68
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

865 ms

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

5.32 s

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

86 ms

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

0.004

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

3.08 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.

6.40 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
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
7.7 MB transferred, 80 requests
FIX
7.7 MB transferred, 80 requests
Critical::
Page weighs 14.9 MB (7.7 MB transferred)
Warning::
Images are 4.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.4 MB
Warning::
JavaScript is 2.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.2 MB
Info::
Fonts are 853 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 853 KB
Info::
80 HTTP requests
Info::
Estimated 1.6 g CO2 per page load
7.7 MB / 2.4 MB budget
7.7 MB transferred
80 requests
1.6 g CO2 per page load
Images 4.4 MiB 57%
JavaScript 2.2 MiB 29%
Fonts 853.3 KiB 11%
CSS 151.1 KiB 2%
HTML 137.4 KiB 2%
Other 2.6 KiB 0%
Other 1.3 KiB 0%
Other 556 B 0%
Other 458 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 (7.7 MiB of 7.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
24 scripts, 347 KB unused
FIX
24 scripts, 347 KB unused
Warning::
https://www.google.com/cse/static/element/dc329f57...: 70 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-KHTJ...: 70 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NV2...: 64 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-459E...: 64 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MFT...: 58 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 347 KB
347 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.google.com/cse/static/element/dc329f57de078f5d/cse_element__en.js?usqp=CAM%3D103 KB70 KB (69%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-KHTJR3J4BS&cx=c&gtm=4e64k0h2173 KB70 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NV22T7BX131 KB64 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-459EKBVHD1&cx=c&gtm=4e64k0h2154 KB64 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MFTLTHJ138 KB58 KB (42%)✓3rd
https://www.utk.edu/wp-content/plugins/home-hero-plugin/build/home-hero-plugin/view.js?ver=086ecbff1bcdbe83b36b45 KB21 KB (47%)✓3rd
https://www.youtube.com/s/player/218d9d92/player_embed_es6.vflset/en_US/base.js436 KB—✓3rd
https://www.youtube.com/iframe_api3 KB—✓3rd
https://www.utk.edu/wp-content/themes/utkwds/js/search-slider.js?ver=a4ebc28e9b5c7ce8e2980 KB—✓3rd
https://cse.google.com/cse.js?cx=da48cf0836de1c9464 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
80 resources · 7.7 MB · 347 KB savings available
FIX
80 resources · 7.7 MB · 347 KB savings available
Warning::
Page weight 6.7 MB over 1MB target
Got: 7.7 MB Expected: ≤ 1 MB
Info::
~347 KB of savings available
Warning::
79 third-party resources (100% of weight)
Info::
11 resources over 200KB
80 resources · 7.7 MiB · 79 third-party 6.7 MiB over 1MB target
Image 57% · 4.4 MiB
JavaScript 29% · 2.2 MiB
Font 11% · 853.3 KiB
CSS 2% · 151.1 KiB
Document 2% · 137.7 KiB
Other 0% · 2.9 KiB

~346.9 KiB of savings available

Remove unused JavaScript: 346.9 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://www.utk.edu/wp-content/themes/utkwds/asset... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.utk.edu/wp-content/uploads/2025/05/it-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.utk.edu/wp-content/themes/utkwds/asset... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 4.4 MB
0 oversized -0 KB
14 legacy format
3 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

B
JS Execution Cost
863ms total JS execution
REVIEW
863ms total JS execution
Warning::
https://www.utk.edu/wp-content/plugins/home-hero-p...: 324ms CPU time
Info::
https://www.utk.edu/: 163ms CPU time
Info::
Unattributable: 109ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-KHTJ...: 100ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-MFT...: 96ms CPU time
Warning::
Third-party scripts: 863ms (100% of total)

Main Thread Breakdown

Script Evaluation 40% Other 33% Style & Layout 17% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://www.utk.edu/wp-content/plugins/home-hero-plugin/build/home-hero-plugin/view.js?ver=086ecbff1bcdbe83b36b324ms79ms2ms3rd
https://www.utk.edu/163ms3ms1ms3rd
Unattributable109ms2ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-KHTJR3J4BS&cx=c&gtm=4e64k0h2100ms85ms11ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MFTLTHJ96ms85ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=G-459EKBVHD1&cx=c&gtm=4e64k0h271ms58ms13ms3rd
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
4 fonts (853 KB)
PASS
4 fonts (853 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

853 KB total

Render-blocking

0

of 4

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 865 ms LCP 5.3 shttps://www.utk.edu/wp-content/themes/utkwds/assets/fonts/montserrat/Montserrat-VariableFont_wght.ttfMontserrat-VariableFont... https://www.utk.edu/wp-content/themes/utkwds/assets/fonts/montserrat/Montserrat-VariableFont_wght.ttf — 385.2 KiB — 46 ms — font-display: swaphttps://www.utk.edu/wp-content/themes/utkwds/assets/fonts/montserrat/Montserrat-Italic-VariableFont_wght.ttfMontserrat-Italic-Varia... https://www.utk.edu/wp-content/themes/utkwds/assets/fonts/montserrat/Montserrat-Italic-VariableFont_wght.ttf — 395.0 KiB — 55 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 68 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2 — 39.2 KiB — 33 ms — font-display: swap
Montserrat-VariableFont... ttf swap
Size 385 KB
Load time 46 ms
Start 586 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Montserrat-Italic-Varia... ttf swap
Size 395 KB
Load time 55 ms
Start 587 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 68 ms
Start 663 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 39 KB
Load time 33 ms
Start 1.0 s
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)

Fixing the unchecked items could save ~624 KB and ~1248 ms

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
80 requests over 2185ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 865 ms LCP 5.3 shttps://utk.edu// https://utk.edu/ — 301 — 356 B — 219 ms — h2http://www.utk.edu/www.utk.edu/ http://www.utk.edu/ — 307 — 0 B — 1 ms — http/1.1https://www.utk.edu/www.utk.edu/ https://www.utk.edu/ — 200 — 25.5 KiB — 179 ms — h2https://www.utk.edu/wp-content/plugins/home-hero-plugin/build/home-hero-plugin/style-index.css?ver=0.1.0www.utk.edu/wp-content/plugins/home... https://www.utk.edu/wp-content/plugins/home-hero-plugin/build/home-hero-plugin/style-index.css?ver=0.1.0 — 200 — 5.5 KiB — 19 ms — h2https://www.utk.edu/wp-includes/blocks/cover/style.min.css?ver=6.9.4www.utk.edu/wp-includes/blocks/cove... https://www.utk.edu/wp-includes/blocks/cover/style.min.css?ver=6.9.4 — 200 — 1.9 KiB — 17 ms — h2https://www.utk.edu/wp-includes/blocks/social-links/style.min.css?ver=6.9.4www.utk.edu/wp-includes/blocks/soci... https://www.utk.edu/wp-includes/blocks/social-links/style.min.css?ver=6.9.4 — 200 — 1.8 KiB — 19 ms — h2https://www.utk.edu/wp-content/plugins/svg-support/css/svgs-attachment.csswww.utk.edu/wp-content/plugins/svg-... https://www.utk.edu/wp-content/plugins/svg-support/css/svgs-attachment.css — 200 — 282 B — 58 ms — h3https://www.utk.edu/wp-content/plugins/custom-stylesheet/public/css/custom-stylesheet.csswww.utk.edu/wp-content/plugins/cust... https://www.utk.edu/wp-content/plugins/custom-stylesheet/public/css/custom-stylesheet.css — 200 — 1.8 KiB — 46 ms — h3https://www.utk.edu/wp-content/plugins/ut-alert-plugin/css/ut-alert.css?ver=1.0www.utk.edu/wp-content/plugins/ut-a... https://www.utk.edu/wp-content/plugins/ut-alert-plugin/css/ut-alert.css?ver=1.0 — 200 — 682 B — 34 ms — h3https://www.utk.edu/wp-content/themes/utkwds/screen.css?ver=bc1b36eba9afbda874f0www.utk.edu/wp-content/themes/utkwd... https://www.utk.edu/wp-content/themes/utkwds/screen.css?ver=bc1b36eba9afbda874f0 — 200 — 23.5 KiB — 36 ms — h3https://www.utk.edu/wp-content/themes/utkwds/assets/images/utk-logo-horizontal.svgwww.utk.edu/wp-content/themes/utkwd... https://www.utk.edu/wp-content/themes/utkwds/assets/images/utk-logo-horizontal.svg — 200 — 18.1 KiB — 37 ms — h3https://www.utk.edu/wp-content/uploads/2025/09/hero-student-life-3.jpgwww.utk.edu/wp-content/uploads/2025... https://www.utk.edu/wp-content/uploads/2025/09/hero-student-life-3.jpg — 200 — 729.9 KiB — 55 ms — h3https://www.utk.edu/wp-content/uploads/2026/03/20230724_Shake_Table_0191-1-1024x682.jpgwww.utk.edu/wp-content/uploads/2026... https://www.utk.edu/wp-content/uploads/2026/03/20230724_Shake_Table_0191-1-1024x682.jpg — 200 — 118.2 KiB — 131 ms — h3https://www.utk.edu/wp-content/uploads/2025/09/hero-sports-1.jpgwww.utk.edu/wp-content/uploads/2025... https://www.utk.edu/wp-content/uploads/2025/09/hero-sports-1.jpg — 200 — 884.0 KiB — 56 ms — h3https://www.utk.edu/wp-content/uploads/2025/09/hero-campus.jpgwww.utk.edu/wp-content/uploads/2025... https://www.utk.edu/wp-content/uploads/2025/09/hero-campus.jpg — 200 — 1.1 MiB — 216 ms — h3https://www.utk.edu/wp-content/uploads/2025/05/it-takes-a-volunteer-tagline.svgwww.utk.edu/wp-content/uploads/2025... https://www.utk.edu/wp-content/uploads/2025/05/it-takes-a-volunteer-tagline.svg — 200 — 13.0 KiB — 42 ms — h3https://www.utk.edu/wp-content/plugins/ut-alert-plugin/js/ut-alert.js?ver=1.0www.utk.edu/wp-content/plugins/ut-a... https://www.utk.edu/wp-content/plugins/ut-alert-plugin/js/ut-alert.js?ver=1.0 — 200 — 2.5 KiB — 63 ms — h3https://www.utk.edu/wp-content/themes/utkwds/js/dropdowns.js?ver=fc76f7f08c03a49f2be7www.utk.edu/wp-content/themes/utkwd... https://www.utk.edu/wp-content/themes/utkwds/js/dropdowns.js?ver=fc76f7f08c03a49f2be7 — 200 — 550 B — 49 ms — h3https://www.utk.edu/wp-content/themes/utkwds/js/collapse.js?ver=1dc741f16178c527198bwww.utk.edu/wp-content/themes/utkwd... https://www.utk.edu/wp-content/themes/utkwds/js/collapse.js?ver=1dc741f16178c527198b — 200 — 572 B — 49 ms — h3https://www.utk.edu/wp-content/themes/utkwds/js/offcanvas.js?ver=696b0236ca6e605a7ca4www.utk.edu/wp-content/themes/utkwd... https://www.utk.edu/wp-content/themes/utkwds/js/offcanvas.js?ver=696b0236ca6e605a7ca4 — 200 — 919 B — 49 ms — h3https://cse.google.com/cse.js?cx=da48cf0836de1c946cse.google.com/cse.js?cx=da48cf0836... https://cse.google.com/cse.js?cx=da48cf0836de1c946 — 200 — 3.9 KiB — 91 ms — h2https://www.utk.edu/wp-content/themes/utkwds/js/search-slider.js?ver=a4ebc28e9b5c7ce8e298www.utk.edu/wp-content/themes/utkwd... https://www.utk.edu/wp-content/themes/utkwds/js/search-slider.js?ver=a4ebc28e9b5c7ce8e298 — 200 — 466 B — 51 ms — h3https://www.utk.edu/wp-content/themes/utkwds/js/tabs.js?ver=e21e1b5e0c9840d4f934www.utk.edu/wp-content/themes/utkwd... https://www.utk.edu/wp-content/themes/utkwds/js/tabs.js?ver=e21e1b5e0c9840d4f934 — 200 — 1.2 KiB — 63 ms — h3https://www.utk.edu/wp-content/plugins/home-hero-plugin/build/home-hero-plugin/view.js?ver=086ecbff1bcdbe83b36bwww.utk.edu/wp-content/plugins/home... https://www.utk.edu/wp-content/plugins/home-hero-plugin/build/home-hero-plugin/view.js?ver=086ecbff1bcdbe83b36b — 200 — 44.5 KiB — 50 ms — h3https://www.utk.edu/wp-content/uploads/2025/09/faculty-quote.jpgwww.utk.edu/wp-content/uploads/2025... https://www.utk.edu/wp-content/uploads/2025/09/faculty-quote.jpg — 200 — 651.4 KiB — 79 ms — h3https://brand.utk.edu/ocm-mp/wp-content/themes/utkwds/assets/images/campus_aerial_sky_bg_1.jpgbrand.utk.edu/ocm-mp/wp-content/the... https://brand.utk.edu/ocm-mp/wp-content/themes/utkwds/assets/images/campus_aerial_sky_bg_1.jpg — 200 — 463.2 KiB — 74 ms — h3https://www.utk.edu/wp-content/themes/utkwds/assets/svg/utk-logo-white.svgwww.utk.edu/wp-content/themes/utkwd... https://www.utk.edu/wp-content/themes/utkwds/assets/svg/utk-logo-white.svg — 200 — 7.5 KiB — 63 ms — h3https://www.googletagmanager.com/gtm.js?id=GTM-MFTLTHJwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-MFTLTHJ — 200 — 138.3 KiB — 175 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-NV22T7BXwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-NV22T7BX — 200 — 131.4 KiB — 194 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg xmlns=%27http://www.w3.org/2000/svg%27 width=%2716%27 heigh…www.w3.org/2000/svg%27 width=%2716%... data:image/svg+xml;charset=utf-8,%3Csvg xmlns=%27http://www.w3.org/2000/svg%27 width=%2716%27 heigh… — 200 — 0 B — 0 ms — data
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https://stats.g.doubleclick.net/g/collect?v=2&tid=G-KHTJR3J4BS&cid=656871215.1776807559&gtm=45je64k0h2v886026034z8898509310za20gzb898509310zd898509310&rcb=2&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266400 — 204 — 556 B — 75 ms — h2https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-KHTJR3J4BS&cid=656871215.1776807559&gtm=45je64k0h2v886026034z8898509310za20gzb898509310zd898509310&rcb=2&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266400&z=1912885934www.google.es/ads/ga-audiences?v=1&... https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-KHTJR3J4BS&cid=656871215.1776807559&gtm=45je64k0h2v886026034z8898509310za20gzb898509310zd898509310&rcb=2&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266400&z=1912885934 — 200 — 408 B — 78 ms — h2https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.jswww.youtube.com/s/player/218d9d92/w... https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.js — 200 — 10.6 KiB — 29 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-459EKBVHD1&gtm=45je64k0h2v9186545611z89186542441za20gzb9186542441zd9186542441&_p=1776807557985&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=656871215.1776807559&frm=0&pscdl=noapi&rcb=6&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117384406&sid=1776807558&sct=1&seg=0&dl=https%3A%2F%2Fwww.utk.edu%2F&dt=University%20of%20Tennessee%2C%20Knoxville&en=page_view&_fv=1&_ss=1&tfd=1233region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-459EKBVHD1&gtm=45je64k0h2v9186545611z89186542441za20gzb9186542441zd9186542441&_p=1776807557985&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=656871215.1776807559&frm=0&pscdl=noapi&rcb=6&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117384406&sid=1776807558&sct=1&seg=0&dl=https%3A%2F%2Fwww.utk.edu%2F&dt=University%20of%20Tennessee%2C%20Knoxville&en=page_view&_fv=1&_ss=1&tfd=1233 — 204 — 290 B — 27 ms — h2https://googleads.g.doubleclick.net/pagead/idgoogleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id — 302 — 23 B — 124 ms — h3https://static.doubleclick.net/instream/ad_status.jsstatic.doubleclick.net/instream/ad_... https://static.doubleclick.net/instream/ad_status.js — 200 — 495 B — 76 ms — h2https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.iLl3DKTx01E.es5.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywFFpF_H_axXXdNkCUfjhvTDOly8rA/m=r78Drbwww.youtube.com/s/_/ytembeds/_/js/k... https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.iLl3DKTx01E.es5.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywFFpF_H_axXXdNkCUfjhvTDOly8rA/m=r78Drb — 200 — 160.9 KiB — 34 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 — 28 ms — h3https://i.ytimg.com/vi/guXcmBdqml0/sddefault.jpgi.ytimg.com/vi/guXcmBdqml0/sddefaul... https://i.ytimg.com/vi/guXcmBdqml0/sddefault.jpg — 200 — 58.7 KiB — 108 ms — h2https://www.gstatic.com/youtube/img/icons/mweb/youtube_fill/logo/v2/67px.svgwww.gstatic.com/youtube/img/icons/m... https://www.gstatic.com/youtube/img/icons/mweb/youtube_fill/logo/v2/67px.svg — 200 — 727 B — 71 ms — h2https://www.utk.edu/wp-content/uploads/2024/11/favicon-150x150.pngwww.utk.edu/wp-content/uploads/2024... https://www.utk.edu/wp-content/uploads/2024/11/favicon-150x150.png — 200 — 964 B — 55 ms — h3https://www.google.com/js/th/Tsj2rE80jstpz6Q1k9XA1bynyWMKlWaB3UmUIkCsRnA.jswww.google.com/js/th/Tsj2rE80jstpz6... https://www.google.com/js/th/Tsj2rE80jstpz6Q1k9XA1bynyWMKlWaB3UmUIkCsRnA.js — 200 — 23.3 KiB — 66 ms — h3https://www.youtube.com/generate_204?1sebfgwww.youtube.com/generate_204?1sebfg https://www.youtube.com/generate_204?1sebfg — 204 — 10 B — 26 ms — h3https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 0 B — 74 ms — h2https://jnn-pa.googleapis.com/$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 — 33 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 863ms · 535KB · $11/mo
www.utk.edu
Other
Costly
Execution 324ms
Transfer 45 KB
Unused 47%
Monthly Cost $4/mo
www.utk.edu
Other
Optional
Execution 163ms
Transfer 26 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 109ms
Transfer 0 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 100ms
Transfer 173 KB
Unused 40%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 96ms
Transfer 138 KB
Unused 42%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 71ms
Transfer 154 KB
Unused 41%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.utk.edu adds 324ms and costs ~$4/month

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

Why this matters

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

Learn more ▾

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

Source: web.dev

www.utk.edu takes 324ms 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

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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