Skip to content
https://umich.edu

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
4
PASS
9
INFO
2

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

Mobile Desktop
60
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.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
82
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.

1.28 s

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

10.24 s

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

63 ms

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

0.284

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

1.80 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.

11.68 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
17
9 PASS 4 REVIEW 2 FIX
F
Page Weight Budget
Action
2.6 MB transferred, 41 requests
FIX
2.6 MB transferred, 41 requests
Warning::
Page weighs 3.2 MB (2.6 MB transferred)
Warning::
Images are 1.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.9 MB
Info::
Fonts are 422 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 422 KB
Info::
41 HTTP requests
Info::
Estimated 0.54 g CO2 per page load
2.6 MB / 2.4 MB budget
2.6 MB transferred
41 requests
0.54 g CO2 per page load
Images 1.9 MiB 73%
Fonts 421.7 KiB 16%
JavaScript 235.8 KiB 9%
CSS 40.1 KiB 2%
HTML 11.4 KiB 0%
Other 1.8 KiB 0%
Other 1.1 KiB 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

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

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
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Warning::
https://umich.edu/includes/image/?type=events-remo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://umich.edu/includes/image/?type=videos-remo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://umich.edu/includes/image/?type=videos-remo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://umich.edu/includes/image/?type=videos-remo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11 images 1.9 MB
0 oversized -0 KB
10 legacy format
5 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

Performance issues directly impact user engagement and conversion rates.

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
1364ms total JS execution
REVIEW
1364ms total JS execution
Warning::
https://umich.edu/: 468ms CPU time
Warning::
https://umich.edu/skins/um2013/scripts/skin.js?175...: 394ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-29C4...: 269ms CPU time
Info::
Unattributable: 233ms CPU time
Info::
Third-party scripts: 502ms (37% of total)

Main Thread Breakdown

Script Evaluation 34% Style & Layout 33% Other 23% Script Parsing & Compilation 4% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://umich.edu/468ms9ms1ms1st
https://umich.edu/skins/um2013/scripts/skin.js?1759868163394ms194ms8ms1st
https://www.googletagmanager.com/gtag/js?id=G-29C4RBNCNZ269ms223ms44ms3rd
Unattributable233ms15ms0ms3rd
B
JS Bundles
9 scripts, 70 KB unused
REVIEW
9 scripts, 70 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-29C4...: 70 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 70 KB
70 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-29C4RBNCNZ175 KB70 KB (40%)✓3rd
https://umich.edu/skins/um2013/scripts/skin.js?175986816333 KB—✓1st
https://umich.edu/includes/panels/news/scripts/index.js?17418129020 KB—✓1st
https://umich.edu/includes/panels/videos/scripts/index.js?17418129021 KB—✓1st
https://umich.edu/includes/panels/gallery/scripts/index.js?17418129027 KB—✓1st
https://umich.edu/scripts/index.js?17418129022 KB—✓1st
https://umich.edu/apis/umalerts/umalerts.js2 KB—✓1st
https://umich.edu/apis/umconsentmanager/consentmanager.js4 KB—✓1st
https://umich.edu/apis/umconsentmanager/node_modules/vanilla-cookieconsent/dist/cookieconsent.umd.js?v=3.1.010 KB—✓1st

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
Page Weight Inventory
Action
41 resources · 2.6 MB · 70 KB savings available
REVIEW
41 resources · 2.6 MB · 70 KB savings available
Warning::
Page weight 1.6 MB over 1MB target
Got: 2.6 MB Expected: ≤ 1 MB
Info::
~70 KB of savings available
Info::
2 third-party resources (7% of weight)
Info::
4 resources over 200KB
41 resources · 2.6 MiB · 2 third-party 1.6 MiB over 1MB target
Image 73% · 1.9 MiB
Font 16% · 421.7 KiB
JavaScript 9% · 235.8 KiB
CSS 2% · 40.1 KiB
Document 0% · 12.0 KiB
Other 0% · 545 B

~70.2 KiB of savings available

Remove unused JavaScript: 70.2 KiB
A+
Third-Party Impact
7% third-party, 0 ms blocking
PASS
7% third-party, 0 ms blocking
Info::
Third-party code accounts for 7% of page weight (175.9 KiB of 2.6 MiB)
Info::
Third-party blocking time is low (0 ms)
93%
First-party Third-party
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
9 fonts (422 KB)
PASS
9 fonts (422 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

422 KB total

Render-blocking

0

of 9

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 1.3 s LCP 10.2 shttps://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/normal.woff2normal.woff2 https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/normal.woff2 — 20.6 KiB — 51 ms — font-display: swaphttps://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/700/normal.woff2normal.woff2 https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/700/normal.woff2 — 20.9 KiB — 50 ms — font-display: swaphttps://umich.edu/cf-fonts/s/roboto/5.0.11/latin/400/normal.woff2normal.woff2 https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/400/normal.woff2 — 20.4 KiB — 49 ms — font-display: swaphttps://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-solid-900.woff2 — 154.9 KiB — 65 ms — font-display: swaphttps://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/italic.woff2italic.woff2 https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/italic.woff2 — 22.1 KiB — 68 ms — font-display: swaphttps://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-regular-400.woff2 — 25.2 KiB — 33 ms — font-display: swaphttps://umich.edu/cf-fonts/s/roboto/5.0.11/latin/700/normal.woff2normal.woff2 https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/700/normal.woff2 — 20.8 KiB — 70 ms — font-display: swaphttps://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-brands-400.woff2 — 116.2 KiB — 76 ms — font-display: swaphttps://umich.edu/cf-fonts/s/roboto/5.0.11/latin/500/normal.woff2normal.woff2 https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/500/normal.woff2 — 20.7 KiB — 33 ms — font-display: swap
normal.woff2 woff2 swap
Size 21 KB
Load time 51 ms
Start 223 ms
Risk FOUT — text flashes from fallback to web font
normal.woff2 woff2 swap
Size 21 KB
Load time 50 ms
Start 223 ms
Risk FOUT — text flashes from fallback to web font
normal.woff2 woff2 swap
Size 20 KB
Load time 49 ms
Start 224 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 155 KB
Load time 65 ms
Start 224 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
italic.woff2 woff2 swap
Size 22 KB
Load time 68 ms
Start 224 ms
Risk FOUT — text flashes from fallback to web font
fa-regular-400.woff2 woff2 swap
Size 25 KB
Load time 33 ms
Start 224 ms
Risk FOUT — text flashes from fallback to web font
normal.woff2 woff2 swap
Size 21 KB
Load time 70 ms
Start 225 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 116 KB
Load time 76 ms
Start 225 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
normal.woff2 woff2 swap
Size 21 KB
Load time 33 ms
Start 457 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)

Fixing the unchecked items could save ~136 KB and ~272 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
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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
41 requests over 1204ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 1.3 s LCP 10.2 shttps://umich.edu// https://umich.edu/ — 200 — 11.4 KiB — 94 ms — h2https://umich.edu/skins/um2013/styles/skin.css?1759868163/skins/um2013/styles/skin.css?17598... https://umich.edu/skins/um2013/styles/skin.css?1759868163 — 200 — 27.2 KiB — 50 ms — h2https://umich.edu/includes/panels/news/styles/index.css?1751562182/includes/panels/news/styles/index.... https://umich.edu/includes/panels/news/styles/index.css?1751562182 — 200 — 633 B — 53 ms — h2https://umich.edu/includes/panels/events/styles/index.css?1751562182/includes/panels/events/styles/inde... https://umich.edu/includes/panels/events/styles/index.css?1751562182 — 200 — 1.1 KiB — 46 ms — h2https://umich.edu/includes/panels/videos/styles/index.css?1751562182/includes/panels/videos/styles/inde... https://umich.edu/includes/panels/videos/styles/index.css?1751562182 — 200 — 983 B — 39 ms — h2https://umich.edu/includes/panels/gallery/styles/index.css?1751562182/includes/panels/gallery/styles/ind... https://umich.edu/includes/panels/gallery/styles/index.css?1751562182 — 200 — 1.3 KiB — 33 ms — h2https://umich.edu/styles/index.css?1762967283/styles/index.css?1762967283 https://umich.edu/styles/index.css?1762967283 — 200 — 2.1 KiB — 32 ms — h2https://umich.edu/skins/um2013/scripts/skin.js?1759868163/skins/um2013/scripts/skin.js?17598... https://umich.edu/skins/um2013/scripts/skin.js?1759868163 — 200 — 33.1 KiB — 55 ms — h2https://umich.edu/includes/panels/news/scripts/index.js?1741812902/includes/panels/news/scripts/index... https://umich.edu/includes/panels/news/scripts/index.js?1741812902 — 200 — 439 B — 36 ms — h2https://umich.edu/includes/panels/videos/scripts/index.js?1741812902/includes/panels/videos/scripts/ind... https://umich.edu/includes/panels/videos/scripts/index.js?1741812902 — 200 — 1.3 KiB — 54 ms — h2https://umich.edu/includes/panels/gallery/scripts/index.js?1741812902/includes/panels/gallery/scripts/in... https://umich.edu/includes/panels/gallery/scripts/index.js?1741812902 — 200 — 7.2 KiB — 34 ms — h2https://umich.edu/scripts/index.js?1741812902/scripts/index.js?1741812902 https://umich.edu/scripts/index.js?1741812902 — 200 — 1.9 KiB — 42 ms — h2https://umich.edu/apis/umalerts/umalerts.js/apis/umalerts/umalerts.js https://umich.edu/apis/umalerts/umalerts.js — 200 — 1.8 KiB — 39 ms — h2https://umich.edu/apis/umconsentmanager/consentmanager.js/apis/umconsentmanager/consentmanag... https://umich.edu/apis/umconsentmanager/consentmanager.js — 200 — 4.5 KiB — 34 ms — h3https://umich.edu/skins/um2013/media/images/umich-logo.png/skins/um2013/media/images/umich-lo... https://umich.edu/skins/um2013/media/images/umich-logo.png — 200 — 8.0 KiB — 61 ms — h3https://umich.edu/includes/image/?type=features&id=1705&name=cyanotype-2500.jpg&width=2500/includes/image/?type=features&id=1... https://umich.edu/includes/image/?type=features&id=1705&name=cyanotype-2500.jpg&width=2500 — 200 — 579.9 KiB — 155 ms — h3https://umich.edu/media/images/infographics/schools-colleges.png/media/images/infographics/schools-... https://umich.edu/media/images/infographics/schools-colleges.png — 200 — 12.0 KiB — 45 ms — h3https://umich.edu/includes/image/?type=videos-remote&id=NNMfNBJ_vHk&name=maxresdefault.jpg&width=500/includes/image/?type=videos-remote... https://umich.edu/includes/image/?type=videos-remote&id=NNMfNBJ_vHk&name=maxresdefault.jpg&width=500 — 200 — 17.8 KiB — 79 ms — h3https://umich.edu/includes/image/?type=videos-remote&id=0fiK6pISh4M&name=maxresdefault.jpg&width=500/includes/image/?type=videos-remote... https://umich.edu/includes/image/?type=videos-remote&id=0fiK6pISh4M&name=maxresdefault.jpg&width=500 — 200 — 29.9 KiB — 86 ms — h3https://umich.edu/includes/image/?type=videos-remote&id=LsQaE-DX7Rg&name=maxresdefault.jpg&width=500/includes/image/?type=videos-remote... https://umich.edu/includes/image/?type=videos-remote&id=LsQaE-DX7Rg&name=maxresdefault.jpg&width=500 — 200 — 32.5 KiB — 85 ms — h3https://umich.edu/includes/image/?type=events-remote&id=147753-21901934&name=event_147753_original-1.jpg&width=500/includes/image/?type=events-remote... https://umich.edu/includes/image/?type=events-remote&id=147753-21901934&name=event_147753_original-1.jpg&width=500 — 200 — 104.8 KiB — 88 ms — h3https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/normal.woff2/cf-fonts/s/roboto-condensed/5.0.14... https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/normal.woff2 — 200 — 20.6 KiB — 51 ms — h3https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/700/normal.woff2/cf-fonts/s/roboto-condensed/5.0.14... https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/700/normal.woff2 — 200 — 20.9 KiB — 50 ms — h3https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/400/normal.woff2/cf-fonts/s/roboto/5.0.11/latin/400... https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/400/normal.woff2 — 200 — 20.4 KiB — 49 ms — h3https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-solid-900.woff2/skins/um2013/vendor/fontawesome-fr... https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-solid-900.woff2 — 200 — 154.9 KiB — 65 ms — h3https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/italic.woff2/cf-fonts/s/roboto-condensed/5.0.14... https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/italic.woff2 — 200 — 22.1 KiB — 68 ms — h3https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-regular-400.woff2/skins/um2013/vendor/fontawesome-fr... https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-regular-400.woff2 — 200 — 25.2 KiB — 33 ms — h3https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/700/normal.woff2/cf-fonts/s/roboto/5.0.11/latin/700... https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/700/normal.woff2 — 200 — 20.8 KiB — 70 ms — h3https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-brands-400.woff2/skins/um2013/vendor/fontawesome-fr... https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-brands-400.woff2 — 200 — 116.2 KiB — 76 ms — h3https://umich.edu/apis/alerts/?mode=prod&type=ealert&source=umich.edu/apis/alerts/?mode=prod&type=ealert... https://umich.edu/apis/alerts/?mode=prod&type=ealert&source=umich.edu — 200 — 316 B — 57 ms — h3
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 1.3 s LCP 10.2 shttps://umich.edu// https://umich.edu/ — 200 — 11.4 KiB — 94 ms — h2https://umich.edu/skins/um2013/styles/skin.css?1759868163/skins/um2013/styles/skin.css?17598... https://umich.edu/skins/um2013/styles/skin.css?1759868163 — 200 — 27.2 KiB — 50 ms — h2https://umich.edu/includes/panels/news/styles/index.css?1751562182/includes/panels/news/styles/index.... https://umich.edu/includes/panels/news/styles/index.css?1751562182 — 200 — 633 B — 53 ms — h2https://umich.edu/includes/panels/events/styles/index.css?1751562182/includes/panels/events/styles/inde... https://umich.edu/includes/panels/events/styles/index.css?1751562182 — 200 — 1.1 KiB — 46 ms — h2https://umich.edu/includes/panels/videos/styles/index.css?1751562182/includes/panels/videos/styles/inde... https://umich.edu/includes/panels/videos/styles/index.css?1751562182 — 200 — 983 B — 39 ms — h2https://umich.edu/includes/panels/gallery/styles/index.css?1751562182/includes/panels/gallery/styles/ind... https://umich.edu/includes/panels/gallery/styles/index.css?1751562182 — 200 — 1.3 KiB — 33 ms — h2https://umich.edu/styles/index.css?1762967283/styles/index.css?1762967283 https://umich.edu/styles/index.css?1762967283 — 200 — 2.1 KiB — 32 ms — h2https://umich.edu/skins/um2013/scripts/skin.js?1759868163/skins/um2013/scripts/skin.js?17598... https://umich.edu/skins/um2013/scripts/skin.js?1759868163 — 200 — 33.1 KiB — 55 ms — h2https://umich.edu/includes/panels/news/scripts/index.js?1741812902/includes/panels/news/scripts/index... https://umich.edu/includes/panels/news/scripts/index.js?1741812902 — 200 — 439 B — 36 ms — h2https://umich.edu/includes/panels/videos/scripts/index.js?1741812902/includes/panels/videos/scripts/ind... https://umich.edu/includes/panels/videos/scripts/index.js?1741812902 — 200 — 1.3 KiB — 54 ms — h2https://umich.edu/includes/panels/gallery/scripts/index.js?1741812902/includes/panels/gallery/scripts/in... https://umich.edu/includes/panels/gallery/scripts/index.js?1741812902 — 200 — 7.2 KiB — 34 ms — h2https://umich.edu/scripts/index.js?1741812902/scripts/index.js?1741812902 https://umich.edu/scripts/index.js?1741812902 — 200 — 1.9 KiB — 42 ms — h2https://umich.edu/apis/umalerts/umalerts.js/apis/umalerts/umalerts.js https://umich.edu/apis/umalerts/umalerts.js — 200 — 1.8 KiB — 39 ms — h2https://umich.edu/apis/umconsentmanager/consentmanager.js/apis/umconsentmanager/consentmanag... https://umich.edu/apis/umconsentmanager/consentmanager.js — 200 — 4.5 KiB — 34 ms — h3https://umich.edu/skins/um2013/media/images/umich-logo.png/skins/um2013/media/images/umich-lo... https://umich.edu/skins/um2013/media/images/umich-logo.png — 200 — 8.0 KiB — 61 ms — h3https://umich.edu/includes/image/?type=features&id=1705&name=cyanotype-2500.jpg&width=2500/includes/image/?type=features&id=1... https://umich.edu/includes/image/?type=features&id=1705&name=cyanotype-2500.jpg&width=2500 — 200 — 579.9 KiB — 155 ms — h3https://umich.edu/media/images/infographics/schools-colleges.png/media/images/infographics/schools-... https://umich.edu/media/images/infographics/schools-colleges.png — 200 — 12.0 KiB — 45 ms — h3https://umich.edu/includes/image/?type=videos-remote&id=NNMfNBJ_vHk&name=maxresdefault.jpg&width=500/includes/image/?type=videos-remote... https://umich.edu/includes/image/?type=videos-remote&id=NNMfNBJ_vHk&name=maxresdefault.jpg&width=500 — 200 — 17.8 KiB — 79 ms — h3https://umich.edu/includes/image/?type=videos-remote&id=0fiK6pISh4M&name=maxresdefault.jpg&width=500/includes/image/?type=videos-remote... https://umich.edu/includes/image/?type=videos-remote&id=0fiK6pISh4M&name=maxresdefault.jpg&width=500 — 200 — 29.9 KiB — 86 ms — h3https://umich.edu/includes/image/?type=videos-remote&id=LsQaE-DX7Rg&name=maxresdefault.jpg&width=500/includes/image/?type=videos-remote... https://umich.edu/includes/image/?type=videos-remote&id=LsQaE-DX7Rg&name=maxresdefault.jpg&width=500 — 200 — 32.5 KiB — 85 ms — h3https://umich.edu/includes/image/?type=events-remote&id=147753-21901934&name=event_147753_original-1.jpg&width=500/includes/image/?type=events-remote... https://umich.edu/includes/image/?type=events-remote&id=147753-21901934&name=event_147753_original-1.jpg&width=500 — 200 — 104.8 KiB — 88 ms — h3https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/normal.woff2/cf-fonts/s/roboto-condensed/5.0.14... https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/normal.woff2 — 200 — 20.6 KiB — 51 ms — h3https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/700/normal.woff2/cf-fonts/s/roboto-condensed/5.0.14... https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/700/normal.woff2 — 200 — 20.9 KiB — 50 ms — h3https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/400/normal.woff2/cf-fonts/s/roboto/5.0.11/latin/400... https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/400/normal.woff2 — 200 — 20.4 KiB — 49 ms — h3https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-solid-900.woff2/skins/um2013/vendor/fontawesome-fr... https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-solid-900.woff2 — 200 — 154.9 KiB — 65 ms — h3https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/italic.woff2/cf-fonts/s/roboto-condensed/5.0.14... https://umich.edu/cf-fonts/s/roboto-condensed/5.0.14/latin/400/italic.woff2 — 200 — 22.1 KiB — 68 ms — h3https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-regular-400.woff2/skins/um2013/vendor/fontawesome-fr... https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-regular-400.woff2 — 200 — 25.2 KiB — 33 ms — h3https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/700/normal.woff2/cf-fonts/s/roboto/5.0.11/latin/700... https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/700/normal.woff2 — 200 — 20.8 KiB — 70 ms — h3https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-brands-400.woff2/skins/um2013/vendor/fontawesome-fr... https://umich.edu/skins/um2013/vendor/fontawesome-free-6.7.2-web/webfonts/fa-brands-400.woff2 — 200 — 116.2 KiB — 76 ms — h3https://umich.edu/apis/alerts/?mode=prod&type=ealert&source=umich.edu/apis/alerts/?mode=prod&type=ealert... https://umich.edu/apis/alerts/?mode=prod&type=ealert&source=umich.edu — 200 — 316 B — 57 ms — h3https://umich.edu/includes/image/?type=features&id=1697&name=Making-Art.jpg&width=2500/includes/image/?type=features&id=1... https://umich.edu/includes/image/?type=features&id=1697&name=Making-Art.jpg&width=2500 — 200 — 405.7 KiB — 61 ms — h3https://umich.edu/includes/image/?type=features&id=1701&name=Making_Nanoparticles_2500px.jpg&width=2500/includes/image/?type=features&id=1... https://umich.edu/includes/image/?type=features&id=1701&name=Making_Nanoparticles_2500px.jpg&width=2500 — 200 — 201.4 KiB — 58 ms — h3https://umich.edu/includes/image/?type=features&id=1699&name=Gateway-EB2_2313.jpg&width=2500/includes/image/?type=features&id=1... https://umich.edu/includes/image/?type=features&id=1699&name=Gateway-EB2_2313.jpg&width=2500 — 200 — 533.8 KiB — 62 ms — h3https://umich.edu/apis/umconsentmanager/node_modules/vanilla-cookieconsent/dist/cookieconsent.umd.js?v=3.1.0/apis/umconsentmanager/node_modules... https://umich.edu/apis/umconsentmanager/node_modules/vanilla-cookieconsent/dist/cookieconsent.umd.js?v=3.1.0 — 200 — 10.3 KiB — 27 ms — h3https://umich.edu/apis/umconsentmanager/node_modules/vanilla-cookieconsent/dist/cookieconsent.css?v=3.1.0/apis/umconsentmanager/node_modules... https://umich.edu/apis/umconsentmanager/node_modules/vanilla-cookieconsent/dist/cookieconsent.css?v=3.1.0 — 200 — 5.7 KiB — 33 ms — h3https://umich.edu/apis/umconsentmanager/consentmanager.css?v=1.0.2/apis/umconsentmanager/consentmanag... https://umich.edu/apis/umconsentmanager/consentmanager.css?v=1.0.2 — 200 — 1.2 KiB — 31 ms — h3https://umich.edu/favicon.ico/favicon.ico https://umich.edu/favicon.ico — 200 — 1.8 KiB — 35 ms — h3https://www.googletagmanager.com/gtag/js?id=G-29C4RBNCNZwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-29C4RBNCNZ — 200 — 175.3 KiB — 145 ms — h2https://umich.edu/apis/country//apis/country/ https://umich.edu/apis/country/ — 200 — 295 B — 462 ms — h3https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/500/normal.woff2/cf-fonts/s/roboto/5.0.11/latin/500... https://umich.edu/cf-fonts/s/roboto/5.0.11/latin/500/normal.woff2 — 200 — 20.7 KiB — 33 ms — h3https://region1.google-analytics.com/g/collect?v=2&tid=G-29C4RBNCNZ&gtm=45je64h1v9101688946za200zd9101688946&_p=1776797460024&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&are=1&cid=584686779.1776797461&frm=0&pscdl=denied&rcb=5&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266400~117384406~117512543&sid=1776797460&sct=1&seg=0&dl=https%3A%2F%2Fumich.edu%2F&dt=University%20of%20Michigan&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=1140region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-29C4RBNCNZ&gtm=45je64h1v9101688946za200zd9101688946&_p=1776797460024&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&are=1&cid=584686779.1776797461&frm=0&pscdl=denied&rcb=5&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266400~117384406~117512543&sid=1776797460&sct=1&seg=0&dl=https%3A%2F%2Fumich.edu%2F&dt=University%20of%20Michigan&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=1140 — 204 — 545 B — 64 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
37% of JavaScript execution is third-party
First-party Third-party 502ms · 175KB · $7/mo
Google Tag Manager
Tag Manager
Costly
Execution 269ms
Transfer 175 KB
Unused 40%
Monthly Cost $4/mo
Unattributable
Other
Costly
Execution 233ms
Transfer 0 KB
Monthly Cost $3/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 269ms and costs ~$4/month
  • Unattributable adds 233ms and costs ~$3/month

Google Tag Manager takes 269ms 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 233ms 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.

Send Feedback