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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
23
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
71
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.

6.15 s

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

21.94 s

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

470 ms

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

0.571

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

8.58 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.

22.44 s

Page Load Progression

581 ms
1.2 s
1.7 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
3.7 MB transferred, 104 requests
FIX
3.7 MB transferred, 104 requests
Warning::
Page weighs 5.7 MB (3.7 MB transferred)
Warning::
Images are 2.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.1 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::
104 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.77 g CO2 per page load
3.7 MB / 2.4 MB budget
3.7 MB transferred
104 requests
0.77 g CO2 per page load
Images 2.1 MiB 58%
Fonts 821.5 KiB 22%
JavaScript 616.0 KiB 16%
CSS 71.4 KiB 2%
Other 30.5 KiB 1%
HTML 17.3 KiB 0%
Other 6.5 KiB 0%
Other 5.0 KiB 0%
Other 559 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 (3.7 MiB of 3.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3701ms total JS execution
FIX
3701ms total JS execution
Warning::
https://cdn.miami.edu/_assets-common/library/found...: 1060ms CPU time
Warning::
https://welcome.miami.edu/: 962ms CPU time
Warning::
Unattributable: 530ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-S6QM...: 393ms CPU time
Warning::
https://scripts.clarity.ms/0.8.59/clarity.js: 259ms CPU time
Warning::
Third-party scripts: 3701ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Other 21% Style & Layout 19% Script Parsing & Compilation 5% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://cdn.miami.edu/_assets-common/library/foundation/foundation-6.js1060ms659ms63ms3rd
https://welcome.miami.edu/962ms14ms2ms3rd
Unattributable530ms16ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-S6QMDWTS2K393ms288ms57ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js259ms231ms11ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PV93H2205ms162ms41ms3rd
https://kit.fontawesome.com/3f4f72c343.js122ms117ms2ms3rd
https://cdn.miami.edu/_assets-common/js/modernizr.js107ms41ms1ms3rd
https://cdn.miami.edu/_assets-common/library/jquery/jquery-3.js62ms49ms9ms3rd
D
JS Bundles
Action
21 scripts, 229 KB unused
FIX
21 scripts, 229 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PV9...: 76 KB unused (54%)
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...: 64 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: 229 KB
229 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-PV93H2141 KB76 KB (54%)✓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 KB64 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://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-migrate.js3 KB—✓3rd
https://cdn.miami.edu/_assets-common/js/modernizr.js5 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
104 resources · 3.7 MB · 229 KB savings available
FIX
104 resources · 3.7 MB · 229 KB savings available
Warning::
Page weight 2.7 MB over 1MB target
Got: 3.7 MB Expected: ≤ 1 MB
Info::
~229 KB of savings available
Warning::
103 third-party resources (100% of weight)
Info::
1 resources over 200KB
104 resources · 3.7 MiB · 103 third-party 2.7 MiB over 1MB target
Image 58% · 2.1 MiB
Font 22% · 821.5 KiB
JavaScript 16% · 616.0 KiB
CSS 3% · 100.0 KiB
Document 0% · 18.1 KiB
Other 0% · 7.7 KiB

~229.3 KiB of savings available

Remove unused JavaScript: 229.3 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

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

C
Image Optimization
Action
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
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://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://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://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://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://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://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://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://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://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/images/system... 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.
Warning::
https://welcome.miami.edu/_assets/images/homepage-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
42 images 2.1 MB
0 oversized -0 KB
34 legacy format
27 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

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
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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s FCP 6.1 s LCP 21.9 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 — 842 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 — 46.6 KiB — 1.1 s — 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 — 1.1 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 — 946 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 — 944 ms — 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 — 1.1 s — 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 — 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 — 34 ms — 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 — 91 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://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 — 91 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 — 168 ms — font-display: swap
StagSans-Light.woff woff swap
Size 47 KB
Load time 842 ms
Start 1.3 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 1.4 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 1.1 s
Start 1.4 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 946 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
StagSans-Book.woff woff swap
Size 48 KB
Load time 944 ms
Start 1.4 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 1.1 s
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Stag-Light.woff woff swap
Size 84 KB
Load time 1.3 s
Start 1.4 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 34 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
free-fa-brands-400.woff2 woff2 swap
Size 117 KB
Load time 91 ms
Start 1.4 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-Medium.woff woff swap
Size 47 KB
Load time 1.1 s
Start 1.4 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 91 ms
Start 1.4 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-Semibold.woff woff swap
Size 47 KB
Load time 168 ms
Start 2.7 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
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
104 requests over 5839ms
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 3701ms · 556KB · $49/mo
cdn.miami.edu
Other
Costly
Execution 1060ms
Transfer 159 KB
Unused 41%
Monthly Cost $14/mo
welcome.miami.edu
Other
Costly
Execution 962ms
Transfer 17 KB
Monthly Cost $13/mo
Unattributable
Other
Costly
Execution 530ms
Transfer 0 KB
Monthly Cost $7/mo
Google Tag Manager
Tag Manager
Costly
Execution 393ms
Transfer 172 KB
Unused 39%
Monthly Cost $5/mo
Microsoft Clarity
Session Replay
Costly
Execution 259ms
Transfer 26 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 205ms
Transfer 141 KB
Unused 54%
Monthly Cost $3/mo
kit.fontawesome.com
Other
Optional
Execution 122ms
Transfer 6 KB
Monthly Cost $2/mo
cdn.miami.edu
Other
Optional
Execution 107ms
Transfer 5 KB
Monthly Cost $1/mo
cdn.miami.edu
Other
Optional
Execution 62ms
Transfer 30 KB
Unused 72%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • cdn.miami.edu adds 1060ms and costs ~$14/month
  • welcome.miami.edu adds 962ms and costs ~$13/month
  • Unattributable adds 530ms and costs ~$7/month
  • Google Tag Manager adds 393ms and costs ~$5/month
  • Microsoft Clarity adds 259ms and costs ~$3/month
  • Google Tag Manager adds 205ms 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 1060ms 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 962ms 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 530ms 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

Google Tag Manager takes 393ms 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

Microsoft Clarity 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

Google Tag Manager takes 205ms 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

54% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

72% of cdn.miami.edu's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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