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https://miami.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
45
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
76
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
58
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

3.88 s

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

5.50 s

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

0 ms

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

0.242

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

4.01 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.

5.50 s

Page Load Progression

656 ms
1.3 s
2.0 s
2.6 s
3.3 s
3.9 s
4.6 s
5.2 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
4.2 MB transferred, 107 requests
FIX
4.2 MB transferred, 107 requests
Critical::
Page weighs 6.2 MB (4.2 MB transferred)
Warning::
Images are 2.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.6 MB
Info::
Fonts are 822 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 822 KB
Warning::
JavaScript is 616 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 616 KB
Warning::
107 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.87 g CO2 per page load
4.2 MB / 2.4 MB budget
4.2 MB transferred
107 requests
0.87 g CO2 per page load
Images 2.6 MiB 63%
Fonts 821.5 KiB 19%
JavaScript 616.4 KiB 14%
CSS 71.4 KiB 2%
Other 30.5 KiB 1%
HTML 17.3 KiB 0%
Other 6.1 KiB 0%
Other 5.0 KiB 0%
Other 550 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

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

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (4.2 MiB of 4.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
21 scripts, 230 KB unused
FIX
21 scripts, 230 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PV9...: 76 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-S6QM...: 68 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.miami.edu/_assets-common/library/found...: 65 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.miami.edu/_assets-common/library/found...: unminified — 72 KB could be saved
Warning::
https://cdn.miami.edu/_assets-common/library/jquer...: 22 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 230 KB
230 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-PV93H2141 KB76 KB (53%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-S6QMDWTS2K172 KB68 KB (39%)✓3rd
https://cdn.miami.edu/_assets-common/library/foundation/foundation-6.js159 KB65 KB (41%)✗3rd
https://cdn.miami.edu/_assets-common/library/jquery/jquery-3.js30 KB22 KB (72%)✓3rd
https://www.clarity.ms/tag/g6hovx9vqb?ref=gtm1 KB—✓3rd
https://cdn.miami.edu/_assets-common/library/slick/slick-6.js14 KB—✗3rd
https://cdn.miami.edu/_assets-common/library/foundation/what-input.js1 KB—✓3rd
https://welcome.miami.edu/_assets/js/um-social.js2 KB—✓3rd
https://welcome.miami.edu/_assets/js/um.welcome.js?version=1.823 KB—✗3rd
https://cdn.miami.edu/_assets-common/library/jquery/jquery.cookie.js1 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

D
Page Weight Inventory
Action
107 resources · 4.2 MB · 230 KB savings available
FIX
107 resources · 4.2 MB · 230 KB savings available
Warning::
Page weight 3.2 MB over 1MB target
Got: 4.2 MB Expected: ≤ 1 MB
Info::
~230 KB of savings available
Warning::
106 third-party resources (100% of weight)
Info::
2 resources over 200KB
107 resources · 4.2 MiB · 106 third-party 3.2 MiB over 1MB target
Image 63% · 2.6 MiB
Font 19% · 821.5 KiB
JavaScript 14% · 616.4 KiB
CSS 2% · 100.0 KiB
Document 0% · 17.9 KiB
Other 0% · 7.5 KiB

~229.8 KiB of savings available

Remove unused JavaScript: 229.8 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
45 images, 0 KB saveable
REVIEW
45 images, 0 KB saveable
Warning::
https://news.miami.edu/alumni/_assets/images/image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i1.ytimg.com/vi/tai6rkCVwao/hqdefault.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.miami.edu/_assets/images-stories/2026... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.miami.edu/_assets/images-stories/2026... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.miami.edu/alumni/_assets/images/image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i1.ytimg.com/vi/xQpJ_AF71Bc/hqdefault.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.miami.edu/frost/_assets/images/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.miami.edu/_assets-common/images/system... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.miami.edu/_assets-common/php/instagram... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.miami.edu/alumni/_assets/images/image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
45 images 2.6 MB
0 oversized -0 KB
35 legacy format
25 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

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

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

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

B
JS Execution Cost
858ms total JS execution
REVIEW
858ms total JS execution
Warning::
https://cdn.miami.edu/_assets-common/library/found...: 267ms CPU time
Warning::
https://welcome.miami.edu/: 259ms CPU time
Info::
Unattributable: 166ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-S6QM...: 90ms CPU time
Info::
https://scripts.clarity.ms/0.8.59/clarity.js: 75ms CPU time
Warning::
Third-party scripts: 858ms (100% of total)

Main Thread Breakdown

Script Evaluation 45% Other 23% Style & Layout 17% Rendering 6% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://cdn.miami.edu/_assets-common/library/foundation/foundation-6.js267ms184ms20ms3rd
https://welcome.miami.edu/259ms11ms1ms3rd
Unattributable166ms4ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-S6QMDWTS2K90ms65ms11ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js75ms66ms2ms3rd
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
12 fonts (822 KB)
PASS
12 fonts (822 KB)
Info::
12 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

12

822 KB total

Render-blocking

0

of 12

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 3.9 s LCP 5.5 shttps://cdn.miami.edu/_assets-common/fonts/StagSans-Light.woffStagSans-Light.woff https://cdn.miami.edu/_assets-common/fonts/StagSans-Light.woff — 46.7 KiB — 847 ms — font-display: swaphttps://cdn.miami.edu/_assets-common/fonts/StagSans-Bold.woffStagSans-Bold.woff https://cdn.miami.edu/_assets-common/fonts/StagSans-Bold.woff — 46.5 KiB — 1.1 s — font-display: swaphttps://ka-f.fontawesome.com/releases/v6.7.2/webfonts/free-fa-solid-900.woff2free-fa-solid-900.woff2 https://ka-f.fontawesome.com/releases/v6.7.2/webfonts/free-fa-solid-900.woff2 — 155.3 KiB — 93 ms — font-display: swaphttps://cdn.miami.edu/_assets-common/fonts/StagSans-Book.woffStagSans-Book.woff https://cdn.miami.edu/_assets-common/fonts/StagSans-Book.woff — 48.3 KiB — 953 ms — font-display: swaphttps://cdn.miami.edu/_assets-common/fonts/foundation-icons.wofffoundation-icons.woff https://cdn.miami.edu/_assets-common/fonts/foundation-icons.woff — 31.4 KiB — 1.3 s — font-display: swaphttps://ka-f.fontawesome.com/releases/v6.7.2/webfonts/free-fa-brands-400.woff2free-fa-brands-400.woff2 https://ka-f.fontawesome.com/releases/v6.7.2/webfonts/free-fa-brands-400.woff2 — 116.7 KiB — 92 ms — font-display: swaphttps://cdn.miami.edu/_assets-common/fonts/Stag-Light.woffStag-Light.woff https://cdn.miami.edu/_assets-common/fonts/Stag-Light.woff — 83.8 KiB — 953 ms — font-display: swaphttps://cdn.miami.edu/_assets-common/fonts/StagSans-Semibold.woffStagSans-Semibold.woff https://cdn.miami.edu/_assets-common/fonts/StagSans-Semibold.woff — 47.1 KiB — 1.2 s — font-display: swaphttps://cdn.miami.edu/_assets-common/fonts/Stag-Bold.woffStag-Bold.woff https://cdn.miami.edu/_assets-common/fonts/Stag-Bold.woff — 81.8 KiB — 1.3 s — font-display: swaphttps://fonts.gstatic.com/s/robotoslab/v36/BngMUXZYTXPIvIBgJJSb6ufN5qWr4xCC.woff2BngMUXZYTXPIvIBgJJSb6uf... https://fonts.gstatic.com/s/robotoslab/v36/BngMUXZYTXPIvIBgJJSb6ufN5qWr4xCC.woff2 — 33.4 KiB — 35 ms — font-display: swaphttps://cdn.miami.edu/_assets-common/fonts/StagSans-Medium.woffStagSans-Medium.woff https://cdn.miami.edu/_assets-common/fonts/StagSans-Medium.woff — 47.0 KiB — 1.1 s — font-display: swaphttps://cdn.miami.edu/_assets-common/fonts/Stag-Book.woffStag-Book.woff https://cdn.miami.edu/_assets-common/fonts/Stag-Book.woff — 83.4 KiB — 1.1 s — font-display: swap
StagSans-Light.woff woff swap
Size 47 KB
Load time 847 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
StagSans-Bold.woff woff swap
Size 47 KB
Load time 1.1 s
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
free-fa-solid-900.woff2 woff2 swap
Size 155 KB
Load time 93 ms
Start 1.9 s
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
StagSans-Book.woff woff swap
Size 48 KB
Load time 953 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
foundation-icons.woff woff swap
Size 31 KB
Load time 1.3 s
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
free-fa-brands-400.woff2 woff2 swap
Size 117 KB
Load time 92 ms
Start 1.9 s
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
Stag-Light.woff woff swap
Size 84 KB
Load time 953 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
StagSans-Semibold.woff woff swap
Size 47 KB
Load time 1.2 s
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Stag-Bold.woff woff swap
Size 82 KB
Load time 1.3 s
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
BngMUXZYTXPIvIBgJJSb6uf... woff2 swap
Size 33 KB
Load time 35 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
StagSans-Medium.woff woff swap
Size 47 KB
Load time 1.1 s
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Stag-Book.woff woff swap
Size 83 KB
Load time 1.1 s
Start 1.9 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)

Fixing the unchecked items could save ~291 KB and ~582 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
107 requests over 6425ms
INFO
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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 858ms · 375KB · $11/mo
cdn.miami.edu
Other
Costly
Execution 267ms
Transfer 159 KB
Unused 41%
Monthly Cost $4/mo
welcome.miami.edu
Other
Costly
Execution 259ms
Transfer 17 KB
Monthly Cost $3/mo
Unattributable
Other
Optional
Execution 166ms
Transfer 0 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 90ms
Transfer 172 KB
Unused 39%
Monthly Cost $1/mo
Microsoft Clarity
Session Replay
Optional
Execution 75ms
Transfer 26 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • cdn.miami.edu adds 267ms and costs ~$4/month
  • welcome.miami.edu adds 259ms and costs ~$3/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

cdn.miami.edu takes 267ms 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

welcome.miami.edu takes 259ms 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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