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https://hopkinsmedicine.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
61
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.

3.32 s

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

9.59 s

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

240 ms

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

0.000

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

4.90 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.

13.70 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
8 PASS 2 REVIEW 5 FIX
D
Page Weight Budget
Action
2.5 MB transferred, 57 requests
FIX
2.5 MB transferred, 57 requests
Warning::
Page weighs 4.5 MB (2.5 MB transferred)
Warning::
Images are 1.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.6 MB
Info::
Fonts are 289 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 289 KB
Info::
57 HTTP requests
Info::
Estimated 0.52 g CO2 per page load
2.5 MB / 2.4 MB budget
2.5 MB transferred
57 requests
0.52 g CO2 per page load
Images 1.6 MiB 66%
JavaScript 432.5 KiB 17%
Fonts 289.0 KiB 11%
CSS 130.7 KiB 5%
HTML 10.0 KiB 0%
Other 8.4 KiB 0%
Other 3.4 KiB 0%
Other 2.2 KiB 0%
Other 0 B 0%
Other 0 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

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 (2.5 MiB of 2.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2196ms total JS execution
FIX
2196ms total JS execution
Warning::
https://www.hopkinsmedicine.org/: 717ms CPU time
Warning::
https://www.hopkinsmedicine.org/assets/js/health.j...: 394ms CPU time
Warning::
https://jhm.containers.piwik.pro/fd716230-1d9c-425...: 379ms CPU time
Warning::
Unattributable: 327ms CPU time
Info::
https://www.hopkinsmedicine.org/cdn-cgi/challenge-...: 241ms CPU time
Warning::
Third-party scripts: 2196ms (100% of total)

Main Thread Breakdown

Script Evaluation 39% Other 23% Style & Layout 23% Script Parsing & Compilation 8% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.hopkinsmedicine.org/717ms36ms3ms3rd
https://www.hopkinsmedicine.org/assets/js/health.js394ms237ms70ms3rd
https://jhm.containers.piwik.pro/fd716230-1d9c-4254-9880-b5715cd3995a.js379ms283ms87ms3rd
Unattributable327ms8ms0ms3rd
https://www.hopkinsmedicine.org/cdn-cgi/challenge-platform/scripts/jsd/main.js241ms228ms3ms3rd
https://www.hopkinsmedicine.org/assets/css/base.css84ms0ms0ms3rd
https://www.hopkinsmedicine.org/assets/js/jquery-3.7.1.min.js54ms38ms8ms3rd
D
Page Weight Inventory
Action
57 resources · 2.5 MB · 195 KB savings available
FIX
57 resources · 2.5 MB · 195 KB savings available
Warning::
Page weight 1.5 MB over 1MB target
Got: 2.5 MB Expected: ≤ 1 MB
Info::
~195 KB of savings available
Warning::
56 third-party resources (100% of weight)
Info::
4 resources over 200KB
57 resources · 2.5 MiB · 56 third-party 1.5 MiB over 1MB target
Image 66% · 1.6 MiB
JavaScript 17% · 432.5 KiB
Font 11% · 289.0 KiB
CSS 5% · 130.7 KiB
Other 0% · 11.0 KiB
Document 0% · 10.3 KiB

~194.7 KiB of savings available

Remove unused JavaScript: 194.7 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
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Warning::
https://www.hopkinsmedicine.org/-/media/images/hop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hopkinsmedicine.org/-/media/images/hop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hopkinsmedicine.org/-/media/som/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hopkinsmedicine.org/-/media/medicine/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hopkinsmedicine.org/-/media/jhm/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
25 images 1.6 MB
0 oversized -0 KB
19 legacy format
5 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

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
10 scripts, 195 KB unused
REVIEW
10 scripts, 195 KB unused
Warning::
https://www.hopkinsmedicine.org/assets/js/health.j...: 166 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://jhm.containers.piwik.pro/fd716230-1d9c-425...: 29 KB unused (23%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 195 KB
195 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.hopkinsmedicine.org/assets/js/health.js217 KB166 KB (77%)✓3rd
https://jhm.containers.piwik.pro/fd716230-1d9c-4254-9880-b5715cd3995a.js126 KB29 KB (23%)✓3rd
https://cdn.cookielaw.org/consent/018ef1e9-de13-746f-94ae-e683992bbd45/OtAutoBlock.js0 KB—✓3rd
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js0 KB—✓3rd
https://www.hopkinsmedicine.org/assets/js/jquery-3.7.1.min.js30 KB—✓3rd
https://www.hopkinsmedicine.org/assets/js/jquery-migrate-1.4.1.min.js4 KB—✓3rd
https://www.hopkinsmedicine.org/assets/js/34.e82d4.js5 KB—✓3rd
https://www.hopkinsmedicine.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?13 KB—✓3rd
https://cdn.schemaapp.com/javascript/highlight.js12 KB—✓3rd
https://jhm.containers.piwik.pro/ppms.js26 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

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 (289 KB)
PASS
5 fonts (289 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

289 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 FCP 3.3 s LCP 9.6 shttps://jhmcdn.azureedge.net/template-assets/fonts/noto-sans/noto-sans-v35_400_latin.woff2noto-sans-v35_400_latin... https://jhmcdn.azureedge.net/template-assets/fonts/noto-sans/noto-sans-v35_400_latin.woff2 — 39.0 KiB — 182 ms — font-display: swaphttps://jhmcdn.azureedge.net/template-assets/fonts/noto-sans/noto-sans-v35_700_latin.woff2noto-sans-v35_700_latin... https://jhmcdn.azureedge.net/template-assets/fonts/noto-sans/noto-sans-v35_700_latin.woff2 — 39.0 KiB — 183 ms — font-display: swaphttps://jhmcdn.azureedge.net/template-assets/fonts/noto-serif/noto-serif-v23_400_latin.woff2noto-serif-v23_400_lati... https://jhmcdn.azureedge.net/template-assets/fonts/noto-serif/noto-serif-v23_400_latin.woff2 — 42.6 KiB — 182 ms — font-display: swaphttps://jhmcdn.azureedge.net/template-assets/fonts/material-icons/material-icons-v140.woff2material-icons-v140.woff2 https://jhmcdn.azureedge.net/template-assets/fonts/material-icons/material-icons-v140.woff2 — 125.8 KiB — 193 ms — font-display: swaphttps://jhmcdn.azureedge.net/template-assets/fonts/noto-serif/noto-serif-v23_700_latin.woff2noto-serif-v23_700_lati... https://jhmcdn.azureedge.net/template-assets/fonts/noto-serif/noto-serif-v23_700_latin.woff2 — 42.6 KiB — 194 ms — font-display: swap
noto-sans-v35_400_latin... woff2 swap
Size 39 KB
Load time 182 ms
Start 704 ms
Risk FOUT — text flashes from fallback to web font
noto-sans-v35_700_latin... woff2 swap
Size 39 KB
Load time 183 ms
Start 708 ms
Risk FOUT — text flashes from fallback to web font
noto-serif-v23_400_lati... woff2 swap
Size 43 KB
Load time 182 ms
Start 709 ms
Risk FOUT — text flashes from fallback to web font
material-icons-v140.woff2 woff2 swap
Size 126 KB
Load time 193 ms
Start 709 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
noto-serif-v23_700_lati... woff2 swap
Size 43 KB
Load time 194 ms
Start 709 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~63 KB and ~126 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
57 requests over 2144ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.3 s LCP 9.6 shttps://hopkinsmedicine.org// https://hopkinsmedicine.org/ — 301 — 362 B — 444 ms — h2https://www.hopkinsmedicine.org/www.hopkinsmedicine.org/ https://www.hopkinsmedicine.org/ — 200 — 10.0 KiB — 75 ms — h2https://cdn.cookielaw.org/consent/018ef1e9-de13-746f-94ae-e683992bbd45/OtAutoBlock.jscdn.cookielaw.org/consent/018ef1e9-... https://cdn.cookielaw.org/consent/018ef1e9-de13-746f-94ae-e683992bbd45/OtAutoBlock.js — -1 — 0 B — 77 ms — https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 77 ms — https://www.hopkinsmedicine.org/assets/css/base.csswww.hopkinsmedicine.org/assets/css/... https://www.hopkinsmedicine.org/assets/css/base.css — 200 — 130.7 KiB — 51 ms — h2https://www.hopkinsmedicine.org/-/media/images/hopkins-medicine-logo-white-header.svg?iar=0&hash=C6173D209DB591FDF4EFE00B18C2FFE4www.hopkinsmedicine.org/-/media/ima... https://www.hopkinsmedicine.org/-/media/images/hopkins-medicine-logo-white-header.svg?iar=0&hash=C6173D209DB591FDF4EFE00B18C2FFE4 — 200 — 5.4 KiB — 50 ms — h2https://www.hopkinsmedicine.org/-/media/medicine/images/som-logo.png?h=440&iar=0&w=640&hash=D029E5EBFBC931F4426EAFA54A5FE1D6www.hopkinsmedicine.org/-/media/med... https://www.hopkinsmedicine.org/-/media/medicine/images/som-logo.png?h=440&iar=0&w=640&hash=D029E5EBFBC931F4426EAFA54A5FE1D6 — 200 — 23.0 KiB — 50 ms — h2https://www.hopkinsmedicine.org/-/media/som/images/_images-md-program/match26/hopkins-match-day-2025-104.jpg?h=440&iar=0&w=640&hash=EBBC5D3A26B7386793FC72B62035F0FDwww.hopkinsmedicine.org/-/media/som... https://www.hopkinsmedicine.org/-/media/som/images/_images-md-program/match26/hopkins-match-day-2025-104.jpg?h=440&iar=0&w=640&hash=EBBC5D3A26B7386793FC72B62035F0FD — 200 — 314.6 KiB — 87 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/researcher-in-lab.jpg?h=366&iar=0&w=650&hash=9D6F5BA6E2EC494762907F8B9CCE50B1www.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/researcher-in-lab.jpg?h=366&iar=0&w=650&hash=9D6F5BA6E2EC494762907F8B9CCE50B1 — 200 — 71.7 KiB — 31 ms — h2https://www.hopkinsmedicine.org/-/media/images/hopkins-nav-logo.svgwww.hopkinsmedicine.org/-/media/ima... https://www.hopkinsmedicine.org/-/media/images/hopkins-nav-logo.svg — 200 — 4.2 KiB — 31 ms — h2https://www.hopkinsmedicine.org/assets/js/jquery-3.7.1.min.jswww.hopkinsmedicine.org/assets/js/j... https://www.hopkinsmedicine.org/assets/js/jquery-3.7.1.min.js — 200 — 29.9 KiB — 33 ms — h2https://www.hopkinsmedicine.org/assets/js/jquery-migrate-1.4.1.min.jswww.hopkinsmedicine.org/assets/js/j... https://www.hopkinsmedicine.org/assets/js/jquery-migrate-1.4.1.min.js — 200 — 4.1 KiB — 29 ms — h2https://www.hopkinsmedicine.org/assets/js/health.jswww.hopkinsmedicine.org/assets/js/h... https://www.hopkinsmedicine.org/assets/js/health.js — 200 — 216.9 KiB — 59 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/icons-png---shared/stethoscope-blue.pngwww.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/icons-png---shared/stethoscope-blue.png — 200 — 19.4 KiB — 64 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/icons-png---shared/location-blue.pngwww.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/icons-png---shared/location-blue.png — 200 — 9.6 KiB — 55 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/icons-png---shared/appointment-blue.pngwww.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/icons-png---shared/appointment-blue.png — 200 — 12.6 KiB — 55 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/icons-png---shared/mychart-blue.pngwww.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/icons-png---shared/mychart-blue.png — 200 — 6.5 KiB — 55 ms — h2https://www.hopkinsmedicine.org/-/media/johns-hopkins-childrens-center/images/usnwr/25-26/peds-usnews-25-26-640-336-3.jpgwww.hopkinsmedicine.org/-/media/joh... https://www.hopkinsmedicine.org/-/media/johns-hopkins-childrens-center/images/usnwr/25-26/peds-usnews-25-26-640-336-3.jpg — 200 — 132.4 KiB — 65 ms — h2https://www.hopkinsmedicine.org/-/media/usnews/images/25-26/slider-image-homepage.pngwww.hopkinsmedicine.org/-/media/usn... https://www.hopkinsmedicine.org/-/media/usnews/images/25-26/slider-image-homepage.png — 200 — 97.5 KiB — 66 ms — h2https://www.hopkinsmedicine.org/-/media/plastic-reconstructive-surgery/byoung-chol-oh-and-gerald-brandacher/rsl-ai/searson-team-copy.jpgwww.hopkinsmedicine.org/-/media/pla... https://www.hopkinsmedicine.org/-/media/plastic-reconstructive-surgery/byoung-chol-oh-and-gerald-brandacher/rsl-ai/searson-team-copy.jpg — 200 — 268.7 KiB — 82 ms — h2https://www.hopkinsmedicine.org/-/media/plastic-reconstructive-surgery/byoung-chol-oh-and-gerald-brandacher/rsl-ai.jpegwww.hopkinsmedicine.org/-/media/pla... https://www.hopkinsmedicine.org/-/media/plastic-reconstructive-surgery/byoung-chol-oh-and-gerald-brandacher/rsl-ai.jpeg — 200 — 52.9 KiB — 77 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/rsl-640.jpgwww.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/rsl-640.jpg — 200 — 18.9 KiB — 77 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/ocd-children.jpgwww.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/ocd-children.jpg — 200 — 47.4 KiB — 77 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/microgrippers-illustration.jpgwww.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/microgrippers-illustration.jpg — 200 — 77.9 KiB — 78 ms — h2https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/digital-twin-heart.jpgwww.hopkinsmedicine.org/-/media/jhm... https://www.hopkinsmedicine.org/-/media/jhm/images/homepage/digital-twin-heart.jpg — 200 — 29.9 KiB — 81 ms — h2https://jhm.containers.piwik.pro/fd716230-1d9c-4254-9880-b5715cd3995a.jsjhm.containers.piwik.pro/fd716230-1... https://jhm.containers.piwik.pro/fd716230-1d9c-4254-9880-b5715cd3995a.js — 200 — 125.5 KiB — 657 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' xml:space='preserve' sty…www.w3.org/2000/svg' xml:space='pre... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' xml:space='preserve' sty… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3…www.w3.org/2000/svg' viewBox='0 0 2... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='137' height='108'…www.w3.org/2000/svg' width='137' he... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='137' height='108'… — 200 — 0 B — 0 ms — datahttps://www.hopkinsmedicine.org/-/media/images/option3.jpgwww.hopkinsmedicine.org/-/media/ima... https://www.hopkinsmedicine.org/-/media/images/option3.jpg — 200 — 300.2 KiB — 77 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.3 s LCP 9.6 shttps://hopkinsmedicine.org// https://hopkinsmedicine.org/ — 301 — 362 B — 444 ms — h2https://www.hopkinsmedicine.org/www.hopkinsmedicine.org/ https://www.hopkinsmedicine.org/ — 200 — 10.0 KiB — 75 ms — h2https://cdn.cookielaw.org/consent/018ef1e9-de13-746f-94ae-e683992bbd45/OtAutoBlock.jscdn.cookielaw.org/consent/018ef1e9-... https://cdn.cookielaw.org/consent/018ef1e9-de13-746f-94ae-e683992bbd45/OtAutoBlock.js — -1 — 0 B — 77 ms — https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 77 ms — https://www.hopkinsmedicine.org/assets/css/base.csswww.hopkinsmedicine.org/assets/css/... https://www.hopkinsmedicine.org/assets/css/base.css — 200 — 130.7 KiB — 51 ms — h2https://www.hopkinsmedicine.org/-/media/images/hopkins-medicine-logo-white-header.svg?iar=0&hash=C6173D209DB591FDF4EFE00B18C2FFE4www.hopkinsmedicine.org/-/media/ima... https://www.hopkinsmedicine.org/-/media/images/hopkins-medicine-logo-white-header.svg?iar=0&hash=C6173D209DB591FDF4EFE00B18C2FFE4 — 200 — 5.4 KiB — 50 ms — h2https://www.hopkinsmedicine.org/-/media/medicine/images/som-logo.png?h=440&iar=0&w=640&hash=D029E5EBFBC931F4426EAFA54A5FE1D6www.hopkinsmedicine.org/-/media/med... https://www.hopkinsmedicine.org/-/media/medicine/images/som-logo.png?h=440&iar=0&w=640&hash=D029E5EBFBC931F4426EAFA54A5FE1D6 — 200 — 23.0 KiB — 50 ms — h2https://www.hopkinsmedicine.org/-/media/som/images/_images-md-program/match26/hopkins-match-day-2025-104.jpg?h=440&iar=0&w=640&hash=EBBC5D3A26B7386793FC72B62035F0FDwww.hopkinsmedicine.org/-/media/som... https://www.hopkinsmedicine.org/-/media/som/images/_images-md-program/match26/hopkins-match-day-2025-104.jpg?h=440&iar=0&w=640&hash=EBBC5D3A26B7386793FC72B62035F0FD — 200 — 314.6 KiB — 87 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 2196ms · 513KB · $29/mo
www.hopkinsmedicine.org
Other
Costly
Execution 717ms
Transfer 10 KB
Monthly Cost $10/mo
www.hopkinsmedicine.org
Other
Costly
Execution 394ms
Transfer 217 KB
Unused 77%
Monthly Cost $5/mo
jhm.containers.piwik.pro
Other
Costly
Execution 379ms
Transfer 126 KB
Unused 23%
Monthly Cost $5/mo
Unattributable
Other
Costly
Execution 327ms
Transfer 0 KB
Monthly Cost $4/mo
www.hopkinsmedicine.org
Other
Costly
Execution 241ms
Transfer 0 KB
Monthly Cost $3/mo
www.hopkinsmedicine.org
Other
Optional
Execution 84ms
Transfer 131 KB
Monthly Cost $1/mo
www.hopkinsmedicine.org
Other
Optional
Execution 54ms
Transfer 30 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.hopkinsmedicine.org adds 717ms and costs ~$10/month
  • www.hopkinsmedicine.org adds 394ms and costs ~$5/month
  • jhm.containers.piwik.pro adds 379ms and costs ~$5/month
  • Unattributable adds 327ms and costs ~$4/month
  • www.hopkinsmedicine.org adds 241ms 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

www.hopkinsmedicine.org takes 717ms 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.hopkinsmedicine.org takes 394ms 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

77% of www.hopkinsmedicine.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

jhm.containers.piwik.pro takes 379ms 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 327ms 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.hopkinsmedicine.org takes 241ms 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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