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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

40
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

3.52 s

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

12.09 s

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

1.35 s

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.

4.95 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.

12.37 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
7 PASS 3 REVIEW 5 FIX
D
Third-Party Impact
Action
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
F
JS Execution Cost
Action
5271ms total JS execution
FIX
5271ms total JS execution
Warning::
https://medicalxpress.com/: 1363ms CPU time
Warning::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 643ms CPU time
Warning::
Unattributable: 637ms CPU time
Warning::
https://fundingchoicesmessages.google.com/i/498820...: 515ms CPU time
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 456ms CPU time
Warning::
Third-party scripts: 3907ms (74% of total)

Main Thread Breakdown

Script Evaluation 41% Other 23% Style & Layout 18% Script Parsing & Compilation 10% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://medicalxpress.com/1363ms16ms8ms1st
https://fundingchoicesmessages.google.com/f/AGSKWxXU9ZTVVXNNqVM_b68iid-_lDi_apEfS0qHc937qamFJAP3rB-CarlIcbKRXe8FPZ7pBgDaSw1CoWVJKn62sqBJLwqYteWrAwTZdzIGUWLIpRLH7ZxoJRzIWKdoPfSBIpde64ldow==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODA3NTY4LDMxODAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzcsMTcsMTldXSwiaHR0cHM6Ly9tZWRpY2FseHByZXNzLmNvbS8iLG51bGwsW1s4LCJEc0tHTi1xcWZyUSJdLFs5LCJlbi1VUyJdLFsxOCwiW1tbbnVsbCw5NjNdXV0iXSxbMzUsIjE3NzY4MDc1NjgiXSxbMTksIjEiXSxbMjQsIiJdLFsyOSwiZmFsc2UiXV1d643ms276ms85ms3rd
Unattributable637ms16ms0ms3rd
https://fundingchoicesmessages.google.com/i/4988204?ers=3515ms466ms35ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946456ms343ms96ms3rd
https://www.googletagmanager.com/gtag/js?id=G-9JGWNNG80H436ms351ms81ms3rd
https://medx.b-cdn.net/tmpl/mobile/js/main.2574936669.js398ms127ms4ms3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-0536483524803400368ms226ms128ms3rd
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604160101/show_ads_impl_fy2021.js263ms170ms91ms3rd
https://securepubads.g.doubleclick.net/tag/js/gpt.js121ms102ms18ms3rd

Showing top 10 of 11 scripts

D
JS Bundles
Action
12 scripts, 413 KB unused
FIX
12 scripts, 413 KB unused
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 150 KB unused (84%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 132 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-9JGW...: 68 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fundingchoicesmessages.google.com/i/498820...: 36 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://pagead2.googlesyndication.com/pagead/js/ad...: 28 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 413 KB
413 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604160101/show_ads_impl_fy2021.js178 KB150 KB (84%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946187 KB132 KB (70%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-9JGWNNG80H170 KB68 KB (40%)✓3rd
https://fundingchoicesmessages.google.com/i/4988204?ers=372 KB36 KB (51%)✓3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-053648352480340054 KB28 KB (51%)✓3rd
https://medx.b-cdn.net/tmpl/mobile/js/visual-stories.2574936669.js4 KB—✓3rd
https://medx.b-cdn.net/tmpl/mobile/js/libs.2574936669.js24 KB—✓3rd
https://medx.b-cdn.net/tmpl/mobile/js/main.2574936669.js8 KB—✓3rd
https://securepubads.g.doubleclick.net/tag/js/gpt.js34 KB—✓3rd
https://bh.contextweb.com/cp?p=8348&token=E5KPVMZKODGT&ch=124 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

F
Page Weight Inventory
Action
55 resources · 1.6 MB · 413 KB savings available
FIX
55 resources · 1.6 MB · 413 KB savings available
Warning::
Page weight 595 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~413 KB of savings available
Warning::
53 third-party resources (99% of weight)
55 resources · 1.6 MiB · 53 third-party 595.1 KiB over 1MB target
JavaScript 52% · 841.7 KiB
Image 39% · 636.6 KiB
Font 3% · 53.9 KiB
CSS 3% · 49.2 KiB
Other 2% · 24.9 KiB
Document 1% · 12.8 KiB

~412.9 KiB of savings available

Remove unused JavaScript: 412.9 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
1.6 MB transferred, 55 requests
REVIEW
1.6 MB transferred, 55 requests
Info::
Page weighs 4.0 MB (1.6 MB transferred)
Warning::
JavaScript is 842 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 842 KB
Info::
55 HTTP requests
Info::
Estimated 0.33 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
55 requests
0.33 g CO2 per page load
JavaScript 841.7 KiB 52%
Images 559.2 KiB 35%
Other 100.3 KiB 6%
Fonts 53.9 KiB 3%
CSS 49.2 KiB 3%
HTML 12.6 KiB 1%
Other 874 B 0%
Other 570 B 0%
Other 559 B 0%
Other 196 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

B
Image Optimization
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Info::
All images are well-optimized
25 images 559 KB
0 oversized -0 KB
24 legacy format
0 missing dimensions CLS risk
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
2 fonts (54 KB)
PASS
2 fonts (54 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

54 KB total

Render-blocking

0

of 2

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 3.5 s LCP 12.1 shttps://medx.b-cdn.net/tmpl/mobile/fonts/fontello.woff2?43891721fontello.woff2 https://medx.b-cdn.net/tmpl/mobile/fonts/fontello.woff2?43891721 — 11.8 KiB — 14 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.1 KiB — 10 ms — font-display: swap
fontello.woff2 woff2 swap
Size 12 KB
Load time 14 ms
Start 502 ms
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 10 ms
Start 1.4 s
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
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
55 requests over 2185ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 3.5 s LCP 12.1 shttps://medicalxpress.com// https://medicalxpress.com/ — 200 — 12.6 KiB — 318 ms — h2https://medx.b-cdn.net/tmpl/mobile/css/main.2563887066.cssmedx.b-cdn.net/tmpl/mobile/css/main... https://medx.b-cdn.net/tmpl/mobile/css/main.2563887066.css — 200 — 42.5 KiB — 42 ms — h2https://www.googletagmanager.com/gtag/js?id=G-9JGWNNG80Hwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-9JGWNNG80H — 200 — 170.2 KiB — 114 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2026/brain-anatomy.jpgscx1.b-cdn.net/csz/news/tmb/2026/br... https://scx1.b-cdn.net/csz/news/tmb/2026/brain-anatomy.jpg — 200 — 2.5 KiB — 29 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2022/liver-2.jpgscx1.b-cdn.net/csz/news/tmb/2022/li... https://scx1.b-cdn.net/csz/news/tmb/2022/liver-2.jpg — 200 — 2.2 KiB — 31 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2026/molecular-keyhole-shed.jpgscx1.b-cdn.net/csz/news/tmb/2026/mo... https://scx1.b-cdn.net/csz/news/tmb/2026/molecular-keyhole-shed.jpg — 200 — 2.5 KiB — 10 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2026/b-cells-that-fight-inf.jpgscx1.b-cdn.net/csz/news/tmb/2026/b-... https://scx1.b-cdn.net/csz/news/tmb/2026/b-cells-that-fight-inf.jpg — 200 — 2.7 KiB — 12 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2026/ai-can-use-a-photo-of.jpgscx1.b-cdn.net/csz/news/tmb/2026/ai... https://scx1.b-cdn.net/csz/news/tmb/2026/ai-can-use-a-photo-of.jpg — 200 — 2.8 KiB — 9 ms — h2https://medx.b-cdn.net/tmpl/mobile/js/visual-stories.2574936669.jsmedx.b-cdn.net/tmpl/mobile/js/visua... https://medx.b-cdn.net/tmpl/mobile/js/visual-stories.2574936669.js — 200 — 3.7 KiB — 24 ms — h2https://medicalxpress.com/manifest.json/manifest.json https://medicalxpress.com/manifest.json — 200 — 874 B — 256 ms — h2https://medx.b-cdn.net/tmpl/mobile/js/libs.2574936669.jsmedx.b-cdn.net/tmpl/mobile/js/libs.... https://medx.b-cdn.net/tmpl/mobile/js/libs.2574936669.js — 200 — 24.4 KiB — 50 ms — h2https://medx.b-cdn.net/tmpl/mobile/js/main.2574936669.jsmedx.b-cdn.net/tmpl/mobile/js/main.... https://medx.b-cdn.net/tmpl/mobile/js/main.2574936669.js — 200 — 7.9 KiB — 41 ms — h2https://securepubads.g.doubleclick.net/tag/js/gpt.jssecurepubads.g.doubleclick.net/tag/... https://securepubads.g.doubleclick.net/tag/js/gpt.js — 200 — 33.8 KiB — 87 ms — h3https://medx.b-cdn.net/tmpl/mobile/img/logo.svgmedx.b-cdn.net/tmpl/mobile/img/logo... https://medx.b-cdn.net/tmpl/mobile/img/logo.svg — 200 — 3.9 KiB — 40 ms — h2https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-0536483524803400pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-0536483524803400 — 200 — 54.4 KiB — 95 ms — h3https://scx1.b-cdn.net/csz/news/tmb/2026/how-immune-cell-networ.jpgscx1.b-cdn.net/csz/news/tmb/2026/ho... https://scx1.b-cdn.net/csz/news/tmb/2026/how-immune-cell-networ.jpg — 200 — 2.8 KiB — 39 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2026/study-reveals-dynamic.jpgscx1.b-cdn.net/csz/news/tmb/2026/st... https://scx1.b-cdn.net/csz/news/tmb/2026/study-reveals-dynamic.jpg — 200 — 2.7 KiB — 47 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2026/in-alzheimers-disease.jpgscx1.b-cdn.net/csz/news/tmb/2026/in... https://scx1.b-cdn.net/csz/news/tmb/2026/in-alzheimers-disease.jpg — 200 — 2.7 KiB — 42 ms — h2https://bh.contextweb.com/cp?p=8348&token=E5KPVMZKODGT&ch=1bh.contextweb.com/cp?p=8348&token=E... https://bh.contextweb.com/cp?p=8348&token=E5KPVMZKODGT&ch=1 — 200 — 23.6 KiB — 60 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/does-the-brain-work-li-1.jpgscx1.b-cdn.net/csz/news/800w/2026/d... https://scx1.b-cdn.net/csz/news/800w/2026/does-the-brain-work-li-1.jpg — 200 — 23.5 KiB — 41 ms — h2https://scx1.b-cdn.net/csz/news/800w/2021/1-neighborhood.jpgscx1.b-cdn.net/csz/news/800w/2021/1... https://scx1.b-cdn.net/csz/news/800w/2021/1-neighborhood.jpg — 200 — 68.8 KiB — 75 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/how-a-key-regulatory-p.jpgscx1.b-cdn.net/csz/news/800w/2026/h... https://scx1.b-cdn.net/csz/news/800w/2026/how-a-key-regulatory-p.jpg — 200 — 54.9 KiB — 146 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/chaos-in-the-heart-and.jpgscx1.b-cdn.net/csz/news/800w/2026/c... https://scx1.b-cdn.net/csz/news/800w/2026/chaos-in-the-heart-and.jpg — 200 — 53.3 KiB — 158 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/childhood-trauma.jpgscx1.b-cdn.net/csz/news/800w/2026/c... https://scx1.b-cdn.net/csz/news/800w/2026/childhood-trauma.jpg — 200 — 38.7 KiB — 142 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/new-cancer-research-to.jpgscx1.b-cdn.net/csz/news/800w/2026/n... https://scx1.b-cdn.net/csz/news/800w/2026/new-cancer-research-to.jpg — 200 — 29.9 KiB — 135 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/novel-ai-pathology-sys-2.jpgscx1.b-cdn.net/csz/news/800w/2026/n... https://scx1.b-cdn.net/csz/news/800w/2026/novel-ai-pathology-sys-2.jpg — 200 — 55.5 KiB — 48 ms — h2https://scx1.b-cdn.net/csz/news/800w/2025/colon-cancer-1.jpgscx1.b-cdn.net/csz/news/800w/2025/c... https://scx1.b-cdn.net/csz/news/800w/2025/colon-cancer-1.jpg — 200 — 25.1 KiB — 51 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/creating-a-wireless-ti.jpgscx1.b-cdn.net/csz/news/800w/2026/c... https://scx1.b-cdn.net/csz/news/800w/2026/creating-a-wireless-ti.jpg — 200 — 37.6 KiB — 65 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/novel-house-design-cut.jpgscx1.b-cdn.net/csz/news/800w/2026/n... https://scx1.b-cdn.net/csz/news/800w/2026/novel-house-design-cut.jpg — 200 — 27.3 KiB — 53 ms — h2https://scx1.b-cdn.net/csz/news/800w/2026/potential-therapeutic.jpgscx1.b-cdn.net/csz/news/800w/2026/p... https://scx1.b-cdn.net/csz/news/800w/2026/potential-therapeutic.jpg — 200 — 62.0 KiB — 63 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 3.5 s LCP 12.1 shttps://medicalxpress.com// https://medicalxpress.com/ — 200 — 12.6 KiB — 318 ms — h2https://medx.b-cdn.net/tmpl/mobile/css/main.2563887066.cssmedx.b-cdn.net/tmpl/mobile/css/main... https://medx.b-cdn.net/tmpl/mobile/css/main.2563887066.css — 200 — 42.5 KiB — 42 ms — h2https://www.googletagmanager.com/gtag/js?id=G-9JGWNNG80Hwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-9JGWNNG80H — 200 — 170.2 KiB — 114 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2026/brain-anatomy.jpgscx1.b-cdn.net/csz/news/tmb/2026/br... https://scx1.b-cdn.net/csz/news/tmb/2026/brain-anatomy.jpg — 200 — 2.5 KiB — 29 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2022/liver-2.jpgscx1.b-cdn.net/csz/news/tmb/2022/li... https://scx1.b-cdn.net/csz/news/tmb/2022/liver-2.jpg — 200 — 2.2 KiB — 31 ms — h2https://scx1.b-cdn.net/csz/news/tmb/2026/molecular-keyhole-shed.jpgscx1.b-cdn.net/csz/news/tmb/2026/mo... 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h3https://fundingchoicesmessages.google.com/el/AGSKWxWCxV6d-V7LUWSmEo0ZFb9Xa9O0ozA_DHgOfFjmptvt_YL06kre35DmxuZUOt3eY9hX1fUkuLEF8yMYBGTgYZXTbIRP8mC9w3ikpnhUeNYtrmwXNCJ3y3w0mQMZZjSY6Ljw5xiQGA==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxWCxV6d-V7LUWSmEo0ZFb9Xa9O0ozA_DHgOfFjmptvt_YL06kre35DmxuZUOt3eY9hX1fUkuLEF8yMYBGTgYZXTbIRP8mC9w3ikpnhUeNYtrmwXNCJ3y3w0mQMZZjSY6Ljw5xiQGA== — 204 — 28 B — 12 ms — h3https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2fonts.gstatic.com/s/opensans/v40/me... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 200 — 42.1 KiB — 10 ms — h3https://medx.b-cdn.net/tmpl/v6/img/favicons/favicon.svgmedx.b-cdn.net/tmpl/v6/img/favicons... https://medx.b-cdn.net/tmpl/v6/img/favicons/favicon.svg — 200 — 77.3 KiB — 17 ms — h2https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gptsecurepubads.g.doubleclick.net/page... https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gpt — 200 — 23.0 KiB — 7 ms — h3https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 11 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
74% of JavaScript execution is third-party
First-party Third-party 3907ms · 802KB · $52/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 643ms
Transfer 75 KB
Monthly Cost $9/mo
Unattributable
Other
Costly
Execution 637ms
Transfer 0 KB
Monthly Cost $8/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 515ms
Transfer 72 KB
Unused 51%
Monthly Cost $7/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 456ms
Transfer 187 KB
Unused 70%
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 436ms
Transfer 170 KB
Unused 40%
Monthly Cost $6/mo
medx.b-cdn.net
Other
Costly
Execution 398ms
Transfer 8 KB
Monthly Cost $5/mo
pagead2.googlesyndication.com
Other
Costly
Execution 368ms
Transfer 54 KB
Unused 51%
Monthly Cost $5/mo
pagead2.googlesyndication.com
Other
Costly
Execution 263ms
Transfer 178 KB
Unused 84%
Monthly Cost $3/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 121ms
Transfer 34 KB
Monthly Cost $2/mo
medx.b-cdn.net
Other
Optional
Execution 70ms
Transfer 24 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • fundingchoicesmessages.google.com adds 643ms and costs ~$9/month
  • Unattributable adds 637ms and costs ~$8/month
  • fundingchoicesmessages.google.com adds 515ms and costs ~$7/month
  • securepubads.g.doubleclick.net adds 456ms and costs ~$6/month
  • Google Tag Manager adds 436ms and costs ~$6/month
  • medx.b-cdn.net adds 398ms and costs ~$5/month
  • pagead2.googlesyndication.com adds 368ms and costs ~$5/month
  • pagead2.googlesyndication.com adds 263ms and costs ~$3/month

74% 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

fundingchoicesmessages.google.com takes 643ms 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 637ms 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

fundingchoicesmessages.google.com takes 515ms 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

51% of fundingchoicesmessages.google.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

securepubads.g.doubleclick.net takes 456ms 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

70% of securepubads.g.doubleclick.net'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

Google Tag Manager takes 436ms 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

medx.b-cdn.net takes 398ms 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

pagead2.googlesyndication.com takes 368ms 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

51% of pagead2.googlesyndication.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

pagead2.googlesyndication.com takes 263ms 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

84% of pagead2.googlesyndication.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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