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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
4
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
34
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.

2.67 s

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

11.98 s

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

4.47 s

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

0.011

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

7.50 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.

16.86 s

Page Load Progression

489 ms
978 ms
1.5 s
2.0 s
2.4 s
2.9 s
3.4 s
3.9 s
Checks
17
7 PASS 4 REVIEW 4 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.9 MiB of 1.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
10176ms total JS execution
FIX
10176ms total JS execution
Warning::
https://www.mayoclinic.org/_next/static/chunks/fra...: 1772ms CPU time
Warning::
https://tagdelivery.mayoclinic.org/dotorg-aem/prod...: 1524ms CPU time
Warning::
Unattributable: 1215ms CPU time
Warning::
https://tagdelivery.mayoclinic.org/dotorg-aem/prod...: 1188ms CPU time
Warning::
https://www.mayoclinic.org/raqLBDcUp1E8/rcFwkY/VqJ...: 1054ms CPU time
Warning::
Third-party scripts: 10176ms (100% of total)

Main Thread Breakdown

Script Evaluation 66% Other 15% Script Parsing & Compilation 6% Style & Layout 5% Garbage Collection 4%
ScriptTotalScriptingParse/CompileParty
https://www.mayoclinic.org/_next/static/chunks/framework-a6b401aab1c737ef.js1772ms1473ms27ms3rd
https://tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.2.js?utv=ut4.54.2026033021221524ms1519ms5ms3rd
Unattributable1215ms87ms0ms3rd
https://tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.js1188ms1034ms24ms3rd
https://www.mayoclinic.org/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAlA/PkIuLg8C1054ms944ms85ms3rd
https://www.mayoclinic.org/748ms26ms5ms3rd
https://www.mayoclinic.org/_next/static/chunks/pages/_app-e9eb2b17d733a952.js498ms258ms169ms3rd
https://xih9lsprjt.kameleoon.io/engine.js425ms341ms59ms3rd
https://nexus.ensighten.com/mayo_clinic/clinic_aem_prod/Bootstrap.js361ms299ms43ms3rd
https://tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.6.js?utv=ut4.54.202410212136332ms2ms1ms3rd

Showing top 10 of 15 scripts

D
Page Weight Inventory
Action
105 resources · 1.9 MB · 248 KB savings available
FIX
105 resources · 1.9 MB · 248 KB savings available
Warning::
Page weight 896 KB over 1MB target
Got: 1.9 MB Expected: ≤ 1 MB
Info::
~248 KB of savings available
Warning::
104 third-party resources (100% of weight)
105 resources · 1.9 MiB · 104 third-party 896.2 KiB over 1MB target
JavaScript 53% · 1017.8 KiB
Image 30% · 566.7 KiB
Font 11% · 205.3 KiB
Document 5% · 98.3 KiB
Other 1% · 23.0 KiB
CSS 0% · 5.0 KiB
Media 0% · 4.0 KiB

~247.6 KiB of savings available

Remove unused JavaScript: 247.6 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
Page Weight Budget
Action
1.9 MB transferred, 105 requests
REVIEW
1.9 MB transferred, 105 requests
Info::
Page weighs 8.8 MB (1.9 MB transferred)
Warning::
JavaScript is 1018 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1018 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::
105 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.39 g CO2 per page load
1.9 MB / 2.4 MB budget
1.9 MB transferred
105 requests
0.39 g CO2 per page load
JavaScript 1017.8 KiB 53%
Images 566.0 KiB 29%
Fonts 205.3 KiB 11%
HTML 98.3 KiB 5%
Other 11.5 KiB 1%
Other 10.9 KiB 1%
CSS 5.0 KiB 0%
Other 4.0 KiB 0%
Other 856 B 0%
Other 478 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
17 images, 0 KB saveable
REVIEW
17 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.
17 images 566 KB
0 oversized -0 KB
7 legacy format
3 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

C
JS Bundles
Action
42 scripts, 248 KB unused
REVIEW
42 scripts, 248 KB unused
Warning::
https://resources.digital-cloud-west.medallia.com/...: 43 KB unused (50%)
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://assets.mayoclinic.org/content/dam/cpm-tran...: 38 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mayoclinic.org/raqLBDcUp1E8/rcFwkY/VqJ...: 32 KB unused (20%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 248 KB
248 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://resources.digital-cloud-west.medallia.com/wdcwest/160107/onsite/generic1774895978140.js86 KB43 KB (50%)✓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-e9eb2b17d733a952.js167 KB40 KB (24%)✓3rd
https://assets.mayoclinic.org/content/dam/cpm-transcend/ui.js83 KB38 KB (46%)✓3rd
https://www.mayoclinic.org/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAlA/PkIuLg8C162 KB32 KB (20%)✓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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.7 s LCP 12.0 shttps://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Regular.woff2MayoClinicSans-Regular.... https://www.mayoclinic.org/mayofonts/Fonts/mayo/MayoClinicSans-Regular.woff2 — 37.9 KiB — 21 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 — 37 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 — 40 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 — 58 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 — 60 ms — font-display: swap
MayoClinicSans-Regular.... woff2 swap
Size 38 KB
Load time 21 ms
Start 922 ms
Risk FOUT — text flashes from fallback to web font
MayoClinicSerif-Bold.woff2 woff2 swap
Size 41 KB
Load time 37 ms
Start 923 ms
Risk FOUT — text flashes from fallback to web font
MayoClinicSans-Bold.woff2 woff2 swap
Size 42 KB
Load time 40 ms
Start 924 ms
Risk FOUT — text flashes from fallback to web font
MayoClinicSerifDisplay-... woff2 swap
Size 43 KB
Load time 58 ms
Start 924 ms
Risk FOUT — text flashes from fallback to web font
MayoClinicSerifDisplay-... woff2 swap
Size 42 KB
Load time 60 ms
Start 924 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
1
preload
1
dns-prefetch
—
prefetch
—

2 resource hints configured

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
105 requests over 5189ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.7 s LCP 12.0 shttps://mayoclinic.org// https://mayoclinic.org/ — 301 — 131 B — 858 ms — http/1.0https://www.mayoclinic.org/www.mayoclinic.org/ https://www.mayoclinic.org/ — 200 — 97.8 KiB — 118 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 — 21 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 — 37 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 — 40 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 — 58 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 — 60 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 — 34 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 — 35 ms — h2https://www.mayoclinic.org/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAlA/PkIuLg8Cwww.mayoclinic.org/raqLBDcUp1E8/rcF... https://www.mayoclinic.org/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAlA/PkIuLg8C — 200 — 162.4 KiB — 49 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 — 57.6 KiB — 48 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 — 43.3 KiB — 54 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 — 614 B — 17 ms — h2https://www.mayoclinic.org/_next/static/chunks/250.0e87e38b6eda9d8c.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/250.0e87e38b6eda9d8c.js — 200 — 5.1 KiB — 32 ms — h2https://www.mayoclinic.org/_next/static/chunks/2765.88d29488f71f8c08.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/2765.88d29488f71f8c08.js — 200 — 3.7 KiB — 33 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 — 50 ms — h2https://www.mayoclinic.org/_next/static/chunks/7778.687f1b806aec4dab.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/7778.687f1b806aec4dab.js — 200 — 3.1 KiB — 77 ms — h2https://www.mayoclinic.org/_next/static/chunks/7439.dcd229dd39f7c5af.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/7439.dcd229dd39f7c5af.js — 200 — 2.9 KiB — 36 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 — 39 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.fbb7ca6a84ca47db.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/3349.fbb7ca6a84ca47db.js — 200 — 2.5 KiB — 43 ms — h2https://www.mayoclinic.org/_next/static/chunks/webpack-ea9c59c224bf73d9.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/webpack-ea9c59c224bf73d9.js — 200 — 3.1 KiB — 45 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 — 58 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 — 54 ms — h2https://www.mayoclinic.org/_next/static/chunks/pages/_app-e9eb2b17d733a952.jswww.mayoclinic.org/_next/static/chu... https://www.mayoclinic.org/_next/static/chunks/pages/_app-e9eb2b17d733a952.js — 200 — 167.2 KiB — 86 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 — 991 B — 59 ms — h2https://www.mayoclinic.org/_next/static/cjm9hDl_hxA_CrllorPAu/_buildManifest.jswww.mayoclinic.org/_next/static/cjm... https://www.mayoclinic.org/_next/static/cjm9hDl_hxA_CrllorPAu/_buildManifest.js — 200 — 727 B — 62 ms — h2https://www.mayoclinic.org/_next/static/cjm9hDl_hxA_CrllorPAu/_ssgManifest.jswww.mayoclinic.org/_next/static/cjm... https://www.mayoclinic.org/_next/static/cjm9hDl_hxA_CrllorPAu/_ssgManifest.js — 200 — 511 B — 64 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 — 26 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 — 40.5 KiB — 59 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.7 s LCP 12.0 shttps://mayoclinic.org// https://mayoclinic.org/ — 301 — 131 B — 858 ms — http/1.0https://www.mayoclinic.org/www.mayoclinic.org/ https://www.mayoclinic.org/ — 200 — 97.8 KiB — 118 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 — 21 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 — 37 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 — 40 ms — 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https://data.privacy.ensighten.com/privacy/v1/b/b.rnc?n=1&c=640&i=8eu06d&p=clinic_aem_prod&s=4121&d=8FB7InZlcnNpb24iOiIxLjAuMCIsImdhdGV3YXkiOiIyLjMuNzk4IiwiY2xpZW50SWQiOjY0MCwicHVibGlzaFBhdGgiOiJjbGluaWNfYWVtX3Byb2QiLCJpbnN0YW5jZTEAYCI4ZXUwNhYA8ApwYWNrZXQiOjEsIm1vZGUiOiJlbmZvcmNlYQDxMG9va2llcyI6e30sImVudmlyb25tZW50IjoiQWxsIFZpc2l0b3JzIiwicmVxdWVzdHMiOlt7ImRlc3RpbmF0acIA8g9odHRwczovL2FpbS10YWcuaGNuLmhlYWx0aC9qcy_EAPAKLmpzP2RsPWFpbURhdGFMYXllciIsInR5cJAA0HNjcmlwdCIsInN0YXKqAMA3NzYzNjMxMjUzNzmYAEZkIjoxFABwODMsInNvdcIAIjoiPADwAF9ET01BdHRyTW9kaWZpZfcA4XN0YXR1cyI6ImJsb2NrEwBgcmVhc29uwwDxCSJXaGl0ZWxpc3QiXSwiZGF0YVBhdHRlch0AMV0sIhoA4DpbIkFkdmVydGlzaW5nKQASaYkAzzUwMzA3NjQxMTB9LA0BWS84NA0BAB82DQF1HzUNAQfwDWNkbjUudXNlcnpvb20uY29tL3RydWVpbnRlbnQkApB1el90aWxfdXMnAv8WY3VpZD1FN0Q1REFEODZEQ0RFNDExODBDOTAwNTA1Njk0NDRGQj0CET00MjMwATc0MjQwAVFIVE1MU30C0l9TRVRBVFRSSUJVVEWKAg8-Ai_4AldlYnNpdGUgQW5hbHl0aWNzRAKfNTI2NjMyODE4NwEK8BguZGVjaWJlbGluc2lnaHQubmV0L2kvMTQwMzYvNzA1ODMwL2RpLmqiAw9NAw4B_AAiZW7EAgNhAz80MjUQAXOvNjMyOTgxODg1ORABB_EFc2Iuc2NvcmVjYXJkcmVzZWFyY2hOAvYTYj9jc191Y2ZyPTAmYzE9MiZjMj02MDM1ODE4Jm5zX190PT8EITQyFADwLWM9VVRGLTgmYzg9VGhlJTIwd29ybGQlMjdzJTIwYmVzdCUyMGhvc3BpdGFsJTIwLSUyME1heW8lMjBDbHgFQSZjNz35BPICJTNBJTJGJTJGd3d3Lm1heW-YBbYub3JnJTJGJmM5PawCMmltZ1wCCuYEPzQyOKkCABc4mQE_aW1n4wRRHyzxBASfODAzOTYyOTgyrQIID50BBjNjMi-MASAvY-EDBg8BArwFDxIBAw74BTc0MjkSAQI8AA8VAWmvNjcyNTAxMTk2N7ICPwDMA349aGlkZGVuwQIgNDYUAA_BAnouNDbBAgAUAAWnBw_BAm2fMTc1NDI3NDkzrAFcLzU3rAF-LjU3rAEfNW0EeK83MTI3MTk0NTEyrAEHwmNkbjEuYWRvYmVyZWQCEXMbB9FhbGxveS8yLjI3LjAvDQAPHAcVLjc1FgEAFAACXgAfImkKTQ8rCAqfNDY4MTU5MzA0EQEHq3dlYm1ldHJpY3OEBvYBL21jL21haW4vMi9pLmdpZn4FIHhogwsNcws9NjEyCgEBFAAFCgGyWEhSX01BTkFHRVK8BQ8qCUyPNDQ4NzcxMTn_AFIQN2kNCyUJARQAD_8AbC8zMg8DCA_-ATc9ODYw_gE3ODYxeQcP_gFjLzQ0_wAIsDY4NGQwZDQ2LmFr9g1PLmlvL-cCDT02OTYdDAIUAA_oAUoIdg4DTQ7QNDM5MjU3NTcxNX1dfQ — 204 — 106 B — 73 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 10176ms · 710KB · $58/mo
www.mayoclinic.org
Other
Costly
Execution 1772ms
Transfer 49 KB
Unused 52%
Monthly Cost $10/mo
tagdelivery.mayoclinic.org
Other
Costly
Execution 1524ms
Transfer 9 KB
Monthly Cost $9/mo
Unattributable
Other
Costly
Execution 1215ms
Transfer 0 KB
Monthly Cost $7/mo
tagdelivery.mayoclinic.org
Other
Costly
Execution 1188ms
Transfer 38 KB
Monthly Cost $7/mo
www.mayoclinic.org
Other
Costly
Execution 1054ms
Transfer 1 KB
Unused 20%
Monthly Cost $6/mo
www.mayoclinic.org
Other
Costly
Execution 748ms
Transfer 0 KB
Monthly Cost $4/mo
www.mayoclinic.org
Other
Costly
Execution 498ms
Transfer 167 KB
Unused 24%
Monthly Cost $3/mo
xih9lsprjt.kameleoon.io
Other
Costly
Execution 425ms
Transfer 72 KB
Monthly Cost $2/mo
nexus.ensighten.com
Other
Costly
Execution 361ms
Transfer 74 KB
Unused 58%
Monthly Cost $2/mo
tagdelivery.mayoclinic.org
Other
Costly
Execution 332ms
Transfer 1 KB
Monthly Cost $2/mo
assets.mayoclinic.org
Other
Costly
Execution 293ms
Transfer 83 KB
Unused 46%
Monthly Cost $2/mo
resources.digital-cloud-west.medallia.com
Other
Costly
Execution 265ms
Transfer 86 KB
Unused 50%
Monthly Cost $2/mo
s.go-mpulse.net
Other
Costly
Execution 254ms
Transfer 43 KB
Monthly Cost $1/mo
transcend-cdn.com
Other
Optional
Execution 161ms
Transfer 58 KB
Unused 47%
Monthly Cost $1/mo
www.mayoclinic.org
Other
Optional
Execution 86ms
Transfer 27 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • www.mayoclinic.org adds 1772ms and costs ~$10/month
  • tagdelivery.mayoclinic.org adds 1524ms and costs ~$9/month
  • Unattributable adds 1215ms and costs ~$7/month
  • tagdelivery.mayoclinic.org adds 1188ms and costs ~$7/month
  • www.mayoclinic.org adds 1054ms and costs ~$6/month
  • www.mayoclinic.org adds 748ms and costs ~$4/month
  • www.mayoclinic.org adds 498ms and costs ~$3/month
  • xih9lsprjt.kameleoon.io adds 425ms and costs ~$2/month
  • nexus.ensighten.com adds 361ms and costs ~$2/month
  • tagdelivery.mayoclinic.org adds 332ms and costs ~$2/month
  • assets.mayoclinic.org adds 293ms and costs ~$2/month
  • resources.digital-cloud-west.medallia.com adds 265ms and costs ~$2/month
  • s.go-mpulse.net adds 254ms 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

www.mayoclinic.org takes 1772ms 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 1524ms 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 1215ms 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

tagdelivery.mayoclinic.org takes 1188ms 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 1054ms 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 748ms 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 498ms 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

xih9lsprjt.kameleoon.io takes 425ms 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

nexus.ensighten.com takes 361ms 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

tagdelivery.mayoclinic.org takes 332ms 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

assets.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

resources.digital-cloud-west.medallia.com takes 265ms 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

50% of resources.digital-cloud-west.medallia.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

s.go-mpulse.net takes 254ms 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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