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https://nd.edu

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
2
PASS
11
INFO
2

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

Mobile Desktop
71
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.
100
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.

3.89 s

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

4.64 s

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

121 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.

5.53 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.

4.64 s

Page Load Progression

405 ms
810 ms
1.2 s
1.6 s
2.0 s
2.4 s
2.8 s
3.2 s
Checks
17
11 PASS 2 REVIEW 2 FIX
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 (417.3 KiB of 417.5 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
JS Execution Cost
Action
1176ms total JS execution
REVIEW
1176ms total JS execution
Warning::
https://www.nd.edu/: 857ms CPU time
Warning::
Unattributable: 319ms CPU time
Warning::
Third-party scripts: 1176ms (100% of total)

Main Thread Breakdown

Style & Layout 45% Other 34% Parse HTML & CSS 8% Script Evaluation 7% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://www.nd.edu/857ms56ms7ms3rd
Unattributable319ms8ms0ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
418 KB transferred, 28 requests
PASS
418 KB transferred, 28 requests
Info::
Page weighs 710 KB (418 KB transferred)
Info::
28 HTTP requests
Info::
Estimated 0.09 g CO2 per page load
418 KB / 2.4 MB budget
418 KB transferred
28 requests
0.09 g CO2 per page load
Images 215.9 KiB 52%
Fonts 106.0 KiB 25%
HTML 56.4 KiB 14%
Other 22.5 KiB 5%
JavaScript 10.2 KiB 2%
Other 4.0 KiB 1%
CSS 1.9 KiB 0%
Other 624 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
Image Optimization
12 images, 0 KB saveable
PASS
12 images, 0 KB saveable
Info::
All images are well-optimized
12 images 216 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
5 fonts (106 KB)
PASS
5 fonts (106 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

106 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 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.9 s LCP 4.6 shttps://www.nd.edu/assets/fonts/gp/gp-book.woff2gp-book.woff2 https://www.nd.edu/assets/fonts/gp/gp-book.woff2 — 16.5 KiB — 474 ms — font-display: swaphttps://www.nd.edu/assets/fonts/garamond/garamond-premier-pro-subhead-regular.min.woff2garamond-premier-pro-su... https://www.nd.edu/assets/fonts/garamond/garamond-premier-pro-subhead-regular.min.woff2 — 33.1 KiB — 276 ms — font-display: swaphttps://www.nd.edu/assets/fonts/garamond/garamond-premier-pro-subhead-italic.min.woff2garamond-premier-pro-su... https://www.nd.edu/assets/fonts/garamond/garamond-premier-pro-subhead-italic.min.woff2 — 34.5 KiB — 419 ms — font-display: swaphttps://www.nd.edu/assets/fonts/gp/gp-medium.woff2gp-medium.woff2 https://www.nd.edu/assets/fonts/gp/gp-medium.woff2 — 15.4 KiB — 416 ms — font-display: swaphttps://www.nd.edu/assets/fonts/gp/gp-bold.woff2gp-bold.woff2 https://www.nd.edu/assets/fonts/gp/gp-bold.woff2 — 6.4 KiB — 427 ms — font-display: swap
gp-book.woff2 woff2 swap
Size 17 KB
Load time 474 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
garamond-premier-pro-su... woff2 swap
Size 33 KB
Load time 276 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
garamond-premier-pro-su... woff2 swap
Size 35 KB
Load time 419 ms
Start 2.6 s
Risk FOUT — text flashes from fallback to web font
gp-medium.woff2 woff2 swap
Size 15 KB
Load time 416 ms
Start 2.6 s
Risk FOUT — text flashes from fallback to web font
gp-bold.woff2 woff2 swap
Size 6 KB
Load time 427 ms
Start 2.6 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)
A+
JS Bundles
3 scripts, 0 KB unused
PASS
3 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.nd.edu/assets/js/lb.js?v=2023-05-174 KB—✓3rd
https://static.nd.edu/js/weglot/1.0.js4 KB—✓3rd
https://www.nd.edu/assets/js/bgvideo.1763379424.js2 KB—✓3rd
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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
1
preload
2
dns-prefetch
—
prefetch
—

3 resource hints configured

A
Page Weight Inventory
28 resources · 418 KB · 0 KB savings available
PASS
28 resources · 418 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 418 KB
Warning::
27 third-party resources (100% of weight)
28 resources · 417.5 KiB · 27 third-party Within 1MB page-weight target
Image 58% · 242.2 KiB
Font 25% · 106.0 KiB
Document 14% · 56.6 KiB
JavaScript 2% · 10.2 KiB
CSS 0% · 1.9 KiB
Other 0% · 624 B
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
28 requests over 3494ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.9 s LCP 4.6 shttps://nd.edu// https://nd.edu/ — 301 — 194 B — 934 ms — http/1.1https://www.nd.edu/www.nd.edu/ https://www.nd.edu/ — 200 — 56.4 KiB — 1.6 s — h2https://www.nd.edu/assets/fonts/gp/gp-book.woff2www.nd.edu/assets/fonts/gp/gp-book.... https://www.nd.edu/assets/fonts/gp/gp-book.woff2 — 200 — 16.5 KiB — 474 ms — h2https://www.nd.edu/assets/fonts/garamond/garamond-premier-pro-subhead-regular.min.woff2www.nd.edu/assets/fonts/garamond/ga... https://www.nd.edu/assets/fonts/garamond/garamond-premier-pro-subhead-regular.min.woff2 — 200 — 33.1 KiB — 276 ms — h2https://www.nd.edu/manifest.jsonwww.nd.edu/manifest.json https://www.nd.edu/manifest.json — 200 — 624 B — 727 ms — h2https://www.nd.edu/assets/features/sustainability/images/poster-sustainability-720.webpwww.nd.edu/assets/features/sustaina... https://www.nd.edu/assets/features/sustainability/images/poster-sustainability-720.webp — 200 — 41.6 KiB — 268 ms — h2https://www.nd.edu/assets/images/home/video-laetare2-800.webpwww.nd.edu/assets/images/home/video... https://www.nd.edu/assets/images/home/video-laetare2-800.webp — 200 — 44.6 KiB — 286 ms — h2https://www.nd.edu/assets/js/lb.js?v=2023-05-17www.nd.edu/assets/js/lb.js?v=2023-0... https://www.nd.edu/assets/js/lb.js?v=2023-05-17 — 200 — 3.5 KiB — 288 ms — h2https://www.nd.edu/assets/images/icons/ndt4-v1.svgwww.nd.edu/assets/images/icons/ndt4... https://www.nd.edu/assets/images/icons/ndt4-v1.svg — 200 — 22.5 KiB — 480 ms — h2https://www.nd.edu/assets/css/images/icn-arrow-right.svgwww.nd.edu/assets/css/images/icn-ar... https://www.nd.edu/assets/css/images/icn-arrow-right.svg — 200 — 667 B — 468 ms — h2https://www.nd.edu/assets/css/images/external-link.svgwww.nd.edu/assets/css/images/extern... https://www.nd.edu/assets/css/images/external-link.svg — 200 — 1.1 KiB — 468 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' v…www.w3.org/2000/svg' width='18' hei... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' v… — 200 — 0 B — 0 ms — datahttps://www.nd.edu/assets/css/images/icn-play-default.svgwww.nd.edu/assets/css/images/icn-pl... https://www.nd.edu/assets/css/images/icn-play-default.svg — 200 — 658 B — 412 ms — h2https://www.nd.edu/assets/images/home/ff-community-regeneration.webpwww.nd.edu/assets/images/home/ff-co... https://www.nd.edu/assets/images/home/ff-community-regeneration.webp — 200 — 61.3 KiB — 432 ms — h2https://www.nd.edu/assets/images/home/ff-children-ghana.webpwww.nd.edu/assets/images/home/ff-ch... https://www.nd.edu/assets/images/home/ff-children-ghana.webp — 200 — 9.1 KiB — 434 ms — h2https://www.nd.edu/assets/images/home/ff-brain-cancer.webpwww.nd.edu/assets/images/home/ff-br... https://www.nd.edu/assets/images/home/ff-brain-cancer.webp — 200 — 22.8 KiB — 435 ms — h2https://www.nd.edu/assets/images/home/ff-maternal-health.webpwww.nd.edu/assets/images/home/ff-ma... https://www.nd.edu/assets/images/home/ff-maternal-health.webp — 200 — 34.0 KiB — 446 ms — h2https://www.nd.edu/assets/fonts/garamond/garamond-premier-pro-subhead-italic.min.woff2www.nd.edu/assets/fonts/garamond/ga... https://www.nd.edu/assets/fonts/garamond/garamond-premier-pro-subhead-italic.min.woff2 — 200 — 34.5 KiB — 419 ms — h2https://www.nd.edu/assets/fonts/gp/gp-medium.woff2www.nd.edu/assets/fonts/gp/gp-mediu... https://www.nd.edu/assets/fonts/gp/gp-medium.woff2 — 200 — 15.4 KiB — 416 ms — h2https://www.nd.edu/assets/fonts/gp/gp-bold.woff2www.nd.edu/assets/fonts/gp/gp-bold.... https://www.nd.edu/assets/fonts/gp/gp-bold.woff2 — 200 — 6.4 KiB — 427 ms — h2https://static.nd.edu/js/weglot/1.0.jsstatic.nd.edu/js/weglot/1.0.js https://static.nd.edu/js/weglot/1.0.js — 200 — 4.4 KiB — 558 ms — h2https://www.nd.edu/assets/js/bgvideo.1763379424.jswww.nd.edu/assets/js/bgvideo.176337... https://www.nd.edu/assets/js/bgvideo.1763379424.js — 200 — 2.3 KiB — 441 ms — h2https://static.nd.edu/js/weglot/1.0.cssstatic.nd.edu/js/weglot/1.0.css https://static.nd.edu/js/weglot/1.0.css — 200 — 1.9 KiB — 4 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 60'%3E%3…www.w3.org/2000/svg' viewBox='0 0 6... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 60'%3E%3… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3… — 200 — 0 B — 0 ms — datahttps://www.nd.edu/favicon.icowww.nd.edu/favicon.ico https://www.nd.edu/favicon.ico — 200 — 2.5 KiB — 259 ms — h2https://static.nd.edu/images/monogram/gold/monogram-192.pngstatic.nd.edu/images/monogram/gold/... https://static.nd.edu/images/monogram/gold/monogram-192.png — 200 — 1.3 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 1176ms · 56KB · $16/mo
www.nd.edu
Other
Costly
Execution 857ms
Transfer 56 KB
Monthly Cost $11/mo
Unattributable
Other
Costly
Execution 319ms
Transfer 0 KB
Monthly Cost $4/mo

These scripts may cost more than they're worth

  • www.nd.edu adds 857ms and costs ~$11/month
  • Unattributable adds 319ms 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.nd.edu takes 857ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 319ms 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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