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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
59
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
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.

1.18 s

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

2.74 s

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

384 ms

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

0.003

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

2.69 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.

4.01 s

Page Load Progression

410 ms
821 ms
1.2 s
1.6 s
2.1 s
2.5 s
2.9 s
3.3 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
2.6 MB transferred, 101 requests
FIX
2.6 MB transferred, 101 requests
Warning::
Page weighs 8.6 MB (2.6 MB transferred)
Warning::
JavaScript is 987 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 987 KB
Info::
Fonts are 205 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 205 KB
Warning::
101 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.55 g CO2 per page load
2.6 MB / 2.4 MB budget
2.6 MB transferred
101 requests
0.55 g CO2 per page load
JavaScript 986.9 KiB 36%
Other 851.0 KiB 31%
Images 542.5 KiB 20%
Fonts 205.3 KiB 8%
HTML 98.0 KiB 4%
Other 10.8 KiB 0%
Other 7.2 KiB 0%
CSS 5.0 KiB 0%
Other 844 B 0%
Other 475 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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 (2.6 MiB of 2.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2192ms total JS execution
FIX
2192ms total JS execution
Warning::
https://tagdelivery.mayoclinic.org/dotorg-aem/prod...: 411ms CPU time
Warning::
https://www.mayoclinic.org/_next/static/chunks/fra...: 390ms CPU time
Warning::
https://tagdelivery.mayoclinic.org/dotorg-aem/prod...: 293ms CPU time
Warning::
Unattributable: 291ms CPU time
Warning::
https://www.mayoclinic.org/jCPSYPzXpzyIf/HOY8oen2L...: 279ms CPU time
Warning::
Third-party scripts: 2192ms (100% of total)

Main Thread Breakdown

Script Evaluation 67% Other 15% Script Parsing & Compilation 6% Style & Layout 5% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.2.js?utv=ut4.54.202603302122411ms410ms1ms3rd
https://www.mayoclinic.org/_next/static/chunks/framework-a6b401aab1c737ef.js390ms320ms6ms3rd
https://tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.js293ms257ms6ms3rd
Unattributable291ms20ms0ms3rd
https://www.mayoclinic.org/jCPSYPzXpzyIf/HOY8oen2LdQb/_A/5b3rNtcYiOS3fVub/QTcvXmg7/UEd/XOjtnIhAB279ms237ms20ms3rd
https://www.mayoclinic.org/212ms6ms1ms3rd
https://www.mayoclinic.org/_next/static/chunks/pages/_app-0e0c06edaf061b5f.js116ms59ms39ms3rd
https://nexus.ensighten.com/mayo_clinic/clinic_aem_prod/Bootstrap.js73ms59ms11ms3rd
https://xih9lsprjt.kameleoon.io/engine.js68ms51ms13ms3rd
https://assets.mayoclinic.org/content/dam/cpm-transcend/ui.js58ms45ms12ms3rd
D
Page Weight Inventory
Action
101 resources · 2.6 MB · 262 KB savings available
FIX
101 resources · 2.6 MB · 262 KB savings available
Warning::
Page weight 1.6 MB over 1MB target
Got: 2.6 MB Expected: ≤ 1 MB
Info::
~262 KB of savings available
Warning::
100 third-party resources (100% of weight)
Info::
1 resources over 200KB
101 resources · 2.6 MiB · 100 third-party 1.6 MiB over 1MB target
JavaScript 36% · 986.9 KiB
Media 31% · 851.0 KiB
Image 20% · 543.2 KiB
Font 8% · 205.3 KiB
Document 4% · 98.0 KiB
Other 1% · 18.6 KiB
CSS 0% · 5.0 KiB

~262.0 KiB of savings available

Remove unused JavaScript: 262.0 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
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
Warning::
https://assets.mayoclinic.org/content/dam/mayoclin... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://assets.mayoclinic.org/content/dam/mayoclin... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://assets.mayoclinic.org/content/dam/mayoclin... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://assets.mayoclinic.org/content/dam/mayoclin... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
20 images 543 KB
0 oversized -0 KB
7 legacy format
4 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

C
JS Bundles
Action
41 scripts, 262 KB unused
REVIEW
41 scripts, 262 KB unused
Warning::
https://resources.digital-cloud-west.medallia.com/...: 51 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://nexus.ensighten.com/mayo_clinic/clinic_aem...: 43 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mayoclinic.org/_next/static/chunks/pag...: 40 KB unused (24%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mayoclinic.org/jCPSYPzXpzyIf/HOY8oen2L...: 38 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.mayoclinic.org/content/dam/cpm-tran...: 38 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 262 KB
262 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://resources.digital-cloud-west.medallia.com/wdcwest/160107/onsite/generic1774895978140.js86 KB51 KB (59%)✓3rd
https://nexus.ensighten.com/mayo_clinic/clinic_aem_prod/Bootstrap.js74 KB43 KB (58%)✓3rd
https://www.mayoclinic.org/_next/static/chunks/pages/_app-0e0c06edaf061b5f.js169 KB40 KB (24%)✓3rd
https://www.mayoclinic.org/jCPSYPzXpzyIf/HOY8oen2LdQb/_A/5b3rNtcYiOS3fVub/QTcvXmg7/UEd/XOjtnIhAB180 KB38 KB (21%)✓3rd
https://assets.mayoclinic.org/content/dam/cpm-transcend/ui.js83 KB38 KB (46%)✓3rd
https://transcend-cdn.com/cm/03274c75-bbc2-448d-a72f-379289a8e380/airgap.js58 KB27 KB (47%)✓3rd
https://www.mayoclinic.org/_next/static/chunks/framework-a6b401aab1c737ef.js49 KB25 KB (52%)✓3rd
https://www.mayoclinic.org/_next/static/chunks/338.c3bc386a285fdac8.js1 KB—✓3rd
https://www.mayoclinic.org/styles/js/gbs/align-language.js1 KB—✓3rd
https://www.mayoclinic.org/_next/static/chunks/9802.f3a34fcce8d7054e.js3 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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
5 fonts (205 KB)
PASS
5 fonts (205 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

205 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 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.2 s LCP 2.7 shttps://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Regular.woff2MayoClinicSans-Regular.... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Regular.woff2 — 37.9 KiB — 25 ms — font-display: swaphttps://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerif-Bold.woff2MayoClinicSerif-Bold.woff2 https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerif-Bold.woff2 — 40.6 KiB — 27 ms — font-display: swaphttps://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Bold.woff2MayoClinicSans-Bold.woff2 https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Bold.woff2 — 41.9 KiB — 54 ms — font-display: swaphttps://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerifDisplay-Bold.woff2MayoClinicSerifDisplay-... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerifDisplay-Bold.woff2 — 43.3 KiB — 57 ms — font-display: swaphttps://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerifDisplay-Light.woff2MayoClinicSerifDisplay-... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerifDisplay-Light.woff2 — 41.6 KiB — 58 ms — font-display: swap
MayoClinicSans-Regular.... woff2 swap
Size 38 KB
Load time 25 ms
Start 683 ms
Risk FOUT — text flashes from fallback to web font
MayoClinicSerif-Bold.woff2 woff2 swap
Size 41 KB
Load time 27 ms
Start 683 ms
Risk FOUT — text flashes from fallback to web font
MayoClinicSans-Bold.woff2 woff2 swap
Size 42 KB
Load time 54 ms
Start 683 ms
Risk FOUT — text flashes from fallback to web font
MayoClinicSerifDisplay-... woff2 swap
Size 43 KB
Load time 57 ms
Start 684 ms
Risk FOUT — text flashes from fallback to web font
MayoClinicSerifDisplay-... woff2 swap
Size 42 KB
Load time 58 ms
Start 684 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)
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
101 requests over 4799ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 1.2 s LCP 2.7 shttps://mayoclinic.com// https://mayoclinic.com/ — 301 — 131 B — 575 ms — http/1.0https://www.mayoclinic.org/www.mayoclinic.org/ https://www.mayoclinic.org/ — 200 — 98.0 KiB — 103 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Regular.woff2www.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Regular.woff2 — 200 — 37.9 KiB — 25 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerif-Bold.woff2www.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerif-Bold.woff2 — 200 — 40.6 KiB — 27 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Bold.woff2www.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Bold.woff2 — 200 — 41.9 KiB — 54 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerifDisplay-Bold.woff2www.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerifDisplay-Bold.woff2 — 200 — 43.3 KiB — 57 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerifDisplay-Light.woff2www.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerifDisplay-Light.woff2 — 200 — 41.6 KiB — 58 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/fonts.csswww.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/fonts.css — 200 — 649 B — 59 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/tajawal/mayo-clinic-fonts-arabic.csswww.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/tajawal/mayo-clinic-fonts-arabic.css — 200 — 621 B — 60 ms — h2https://www.mayoclinic.org/jCPSYPzXpzyIf/HOY8oen2LdQb/_A/5b3rNtcYiOS3fVub/QTcvXmg7/UEd/XOjtnIhABwww.mayoclinic.org/jCPSYPzXpzyIf/HO... https://www.mayoclinic.org/jCPSYPzXpzyIf/HOY8oen2LdQb/_A/5b3rNtcYiOS3fVub/QTcvXmg7/UEd/XOjtnIhAB — 200 — 179.5 KiB — 33 ms — h2https://transcend-cdn.com/cm/03274c75-bbc2-448d-a72f-379289a8e380/airgap.jstranscend-cdn.com/cm/03274c75-bbc2-... https://transcend-cdn.com/cm/03274c75-bbc2-448d-a72f-379289a8e380/airgap.js — 200 — 57.5 KiB — 80 ms — h3https://s.go-mpulse.net/boomerang/AE377-TGE2S-92GPZ-AE4B3-VR4DYs.go-mpulse.net/boomerang/AE377-TGE... https://s.go-mpulse.net/boomerang/AE377-TGE2S-92GPZ-AE4B3-VR4DY — 200 — 43.4 KiB — 80 ms — h2https://tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.sync.jstagdelivery.mayoclinic.org/dotorg-a... https://tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.sync.js — 200 — 616 B — 24 ms — h2https://www.mayoclinic.org/_next/static/chunks/250.94374fdebff64ee8.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/250.94374fdebff64ee8.js — 200 — 5.1 KiB — 31 ms — h2https://www.mayoclinic.org/_next/static/chunks/2765.e7bec98adb76af65.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/2765.e7bec98adb76af65.js — 200 — 3.7 KiB — 57 ms — h2https://www.mayoclinic.org/_next/static/chunks/6314.a6ea5b88b5c724ae.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/6314.a6ea5b88b5c724ae.js — 200 — 3.6 KiB — 71 ms — h2https://www.mayoclinic.org/_next/static/chunks/7778.3b56d9ef16c50899.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/7778.3b56d9ef16c50899.js — 200 — 3.1 KiB — 90 ms — h2https://www.mayoclinic.org/_next/static/chunks/7439.c5b954a5d6396db4.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/7439.c5b954a5d6396db4.js — 200 — 2.9 KiB — 61 ms — h2https://www.mayoclinic.org/_next/static/chunks/9802.f3a34fcce8d7054e.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/9802.f3a34fcce8d7054e.js — 200 — 3.2 KiB — 62 ms — h2https://www.mayoclinic.org/_next/static/chunks/4526.a5cdd12f9c6c7eea.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/4526.a5cdd12f9c6c7eea.js — 200 — 1.9 KiB — 41 ms — h2https://www.mayoclinic.org/_next/static/chunks/3349.3d690814daf0c5d2.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/3349.3d690814daf0c5d2.js — 200 — 2.5 KiB — 41 ms — h2https://www.mayoclinic.org/_next/static/chunks/webpack-9acdbef03c8f62ad.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/webpack-9acdbef03c8f62ad.js — 200 — 3.1 KiB — 64 ms — h2https://www.mayoclinic.org/_next/static/chunks/framework-a6b401aab1c737ef.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/framework-a6b401aab1c737ef.js — 200 — 49.3 KiB — 92 ms — h2https://www.mayoclinic.org/_next/static/chunks/main-778d51de2c630e22.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/main-778d51de2c630e22.js — 200 — 27.4 KiB — 47 ms — h2https://www.mayoclinic.org/_next/static/chunks/pages/_app-0e0c06edaf061b5f.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/pages/_app-0e0c06edaf061b5f.js — 200 — 168.6 KiB — 102 ms — h2https://www.mayoclinic.org/_next/static/chunks/pages/%5B%5B...slug%5D%5D-ace70359570f9ea9.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/pages/%5B%5B...slug%5D%5D-ace70359570f9ea9.js — 200 — 992 B — 81 ms — h2https://www.mayoclinic.org/_next/static/v0h6R1yHTV3XDNHtdb11q/_buildManifest.jswww.mayoclinic.org/_next/static/v0h... https://www.mayoclinic.org/_next/static/v0h6R1yHTV3XDNHtdb11q/_buildManifest.js — 200 — 727 B — 83 ms — h2https://www.mayoclinic.org/_next/static/v0h6R1yHTV3XDNHtdb11q/_ssgManifest.jswww.mayoclinic.org/_next/static/v0h... https://www.mayoclinic.org/_next/static/v0h6R1yHTV3XDNHtdb11q/_ssgManifest.js — 200 — 511 B — 45 ms — h2https://assets.mayoclinic.org/content/dam/mayoclinic/images/logos/mayo-clinic-logo.svgassets.mayoclinic.org/content/dam/m... https://assets.mayoclinic.org/content/dam/mayoclinic/images/logos/mayo-clinic-logo.svg — 200 — 2.1 KiB — 27 ms — h2https://assets.mayoclinic.org/content/dam/media/global/images/2023/12/28/healing-starts-here-MC11REJU-600x800.jpgassets.mayoclinic.org/content/dam/m... https://assets.mayoclinic.org/content/dam/media/global/images/2023/12/28/healing-starts-here-MC11REJU-600x800.jpg — 200 — 17.5 KiB — 71 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 1.2 s LCP 2.7 shttps://mayoclinic.com// https://mayoclinic.com/ — 301 — 131 B — 575 ms — http/1.0https://www.mayoclinic.org/www.mayoclinic.org/ https://www.mayoclinic.org/ — 200 — 98.0 KiB — 103 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Regular.woff2www.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Regular.woff2 — 200 — 37.9 KiB — 25 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerif-Bold.woff2www.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSerif-Bold.woff2 — 200 — 40.6 KiB — 27 ms — h2https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Bold.woff2www.mayoclinic.org/mayofonts/Fonts/... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Bold.woff2 — 200 — 41.9 KiB — 54 ms — 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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 2192ms · 494KB · $13/mo
tagdelivery.mayoclinic.org
Other
Costly
Execution 411ms
Transfer 9 KB
Monthly Cost $2/mo
www.mayoclinic.org
Other
Costly
Execution 390ms
Transfer 49 KB
Unused 52%
Monthly Cost $2/mo
tagdelivery.mayoclinic.org
Other
Costly
Execution 293ms
Transfer 41 KB
Monthly Cost $2/mo
Unattributable
Other
Costly
Execution 291ms
Transfer 0 KB
Monthly Cost $2/mo
www.mayoclinic.org
Other
Costly
Execution 279ms
Transfer 1 KB
Unused 21%
Monthly Cost $2/mo
www.mayoclinic.org
Other
Costly
Execution 212ms
Transfer 0 KB
Monthly Cost $1/mo
www.mayoclinic.org
Other
Optional
Execution 116ms
Transfer 169 KB
Unused 24%
Monthly Cost $1/mo
nexus.ensighten.com
Other
Optional
Execution 73ms
Transfer 74 KB
Unused 58%
Monthly Cost $0/mo
xih9lsprjt.kameleoon.io
Other
Optional
Execution 68ms
Transfer 67 KB
Monthly Cost $0/mo
assets.mayoclinic.org
Other
Optional
Execution 58ms
Transfer 83 KB
Unused 46%
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • tagdelivery.mayoclinic.org adds 411ms and costs ~$2/month
  • www.mayoclinic.org adds 390ms and costs ~$2/month
  • tagdelivery.mayoclinic.org adds 293ms and costs ~$2/month
  • Unattributable adds 291ms and costs ~$2/month
  • www.mayoclinic.org adds 279ms and costs ~$2/month
  • www.mayoclinic.org adds 212ms and costs ~$1/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

tagdelivery.mayoclinic.org takes 411ms 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

www.mayoclinic.org takes 390ms 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

52% of www.mayoclinic.org'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

tagdelivery.mayoclinic.org takes 293ms 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 291ms 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

www.mayoclinic.org takes 279ms 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

www.mayoclinic.org takes 212ms 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

58% of nexus.ensighten.com'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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