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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
46
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.
91
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.

2.53 s

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

4.97 s

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

3.44 s

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

0.037

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

4.74 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.

19.34 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 2 REVIEW 6 FIX
D
Page Weight Budget
Action
2.2 MB transferred, 104 requests
FIX
2.2 MB transferred, 104 requests
Info::
Page weighs 6.8 MB (2.2 MB transferred)
Warning::
JavaScript is 1.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.6 MB
Warning::
104 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.46 g CO2 per page load
2.2 MB / 2.4 MB budget
2.2 MB transferred
104 requests
0.46 g CO2 per page load
JavaScript 1.6 MiB 75%
Images 218.3 KiB 10%
Other 177.3 KiB 8%
Fonts 47.9 KiB 2%
HTML 46.7 KiB 2%
Other 25.2 KiB 1%
CSS 24.2 KiB 1%
Other 16.4 KiB 1%
Other 331 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

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 (2.2 MiB of 2.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
8317ms total JS execution
FIX
8317ms total JS execution
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 1417ms CPU time
Warning::
Unattributable: 1014ms CPU time
Warning::
https://www.bmj.com/: 775ms CPU time
Warning::
https://analytics.bmj.com/gtm.js?id=GTM-NF7HCLL: 635ms CPU time
Warning::
https://cookie-cdn.cookiepro.com/scripttemplates/2...: 634ms CPU time
Warning::
Third-party scripts: 8317ms (100% of total)

Main Thread Breakdown

Script Evaluation 67% Other 14% Style & Layout 7% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js1417ms1275ms75ms3rd
Unattributable1014ms64ms0ms3rd
https://www.bmj.com/775ms22ms6ms3rd
https://analytics.bmj.com/gtm.js?id=GTM-NF7HCLL635ms551ms69ms3rd
https://cookie-cdn.cookiepro.com/scripttemplates/202604.1.0/otTCF.js634ms554ms6ms3rd
https://cookie-cdn.cookiepro.com/scripttemplates/202604.1.0/otBannerSdk.js484ms303ms66ms3rd
https://analytics.bmj.com/gtag/js?id=G-N0KVPL2464&cx=c&gtm=4e64h1&sign=83e2c1b12c70a9558f13df5b162eac5b6c035d42774f6ce16bcea8d559a22c89_20260421461ms349ms46ms3rd
https://jsconfig.adsafeprotected.com/jsconfig/rjss/st/2731174/92424455/skeleton.js?cbName=__IntegralAS__6480395ms369ms1ms3rd
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js393ms329ms35ms3rd
https://www.googletagmanager.com/gtag/js?id=G-8P7810XE1M&cx=c&gtm=4e64h1&sign=83e2c1b12c70a9558f13df5b162eac5b6c035d42774f6ce16bcea8d559a22c89_20260421333ms285ms44ms3rd

Showing top 10 of 20 scripts

F
JS Bundles
Action
37 scripts, 571 KB unused
FIX
37 scripts, 571 KB unused
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 97 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://analytics.bmj.com/gtag/js?id=G-LHT0ZJKRSY&...: 78 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://analytics.bmj.com/gtag/js?id=G-N0KVPL2464&...: 70 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://analytics.bmj.com/gtm.js?id=GTM-NF7HCLL: 65 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/destination?...: 65 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 571 KB
571 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB97 KB (52%)✓3rd
https://analytics.bmj.com/gtag/js?id=G-LHT0ZJKRSY&cx=c&gtm=4e64h1&sign=83e2c1b12c70a9558f13df5b162eac5b6c035d42774f6ce16bcea8d559a22c89_20260421195 KB78 KB (40%)✓3rd
https://analytics.bmj.com/gtag/js?id=G-N0KVPL2464&cx=c&gtm=4e64h1&sign=83e2c1b12c70a9558f13df5b162eac5b6c035d42774f6ce16bcea8d559a22c89_20260421180 KB70 KB (39%)✓3rd
https://analytics.bmj.com/gtm.js?id=GTM-NF7HCLL200 KB65 KB (33%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=DC-13070819&cx=c&gtm=4e64h1&sign=83e2c1b12c70a9558f13df5b162eac5b6c035d42774f6ce16bcea8d559a22c89_20260421130 KB65 KB (50%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-8P7810XE1M&cx=c&gtm=4e64h1&sign=83e2c1b12c70a9558f13df5b162eac5b6c035d42774f6ce16bcea8d559a22c89_20260421152 KB64 KB (42%)✓3rd
https://cookie-cdn.cookiepro.com/scripttemplates/202604.1.0/otBannerSdk.js131 KB63 KB (48%)✓3rd
https://fw.adsafeprotected.com/rjss/st/2731174/92424455/skeleton.js92 KB37 KB (40%)✓3rd
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js73 KB30 KB (41%)✓3rd
https://www.bmj.com/_next/static/chunks/363-c279d1e5e0049870.js5 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

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
104 resources · 2.2 MB · 571 KB savings available
FIX
104 resources · 2.2 MB · 571 KB savings available
Warning::
Page weight 1.2 MB over 1MB target
Got: 2.2 MB Expected: ≤ 1 MB
Info::
~571 KB of savings available
Warning::
103 third-party resources (100% of weight)
Info::
1 resources over 200KB
104 resources · 2.2 MiB · 103 third-party 1.2 MiB over 1MB target
JavaScript 81% · 1.8 MiB
Image 10% · 219.8 KiB
Other 4% · 87.8 KiB
Font 2% · 47.9 KiB
Document 2% · 46.9 KiB
CSS 1% · 29.4 KiB

~570.7 KiB of savings available

Remove unused JavaScript: 570.7 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.

B
Image Optimization
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Info::
All images are well-optimized
27 images 218 KB
0 oversized -0 KB
18 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 (48 KB)
PASS
2 fonts (48 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

48 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.5 s LCP 5.0 shttps://www.bmj.com/_next/static/media/if_std_rg-webfont.90c6a082.woffif_std_rg-webfont.90c6a... https://www.bmj.com/_next/static/media/if_std_rg-webfont.90c6a082.woff — 23.6 KiB — 57 ms — font-display: swaphttps://www.bmj.com/_next/static/media/if_std_bd-webfont.ed1e08b9.woffif_std_bd-webfont.ed1e0... https://www.bmj.com/_next/static/media/if_std_bd-webfont.ed1e08b9.woff — 24.3 KiB — 42 ms — font-display: swap
if_std_rg-webfont.90c6a... woff swap
Size 24 KB
Load time 57 ms
Start 265 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
if_std_bd-webfont.ed1e0... woff swap
Size 24 KB
Load time 42 ms
Start 265 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~14 KB and ~28 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
104 requests over 3336ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.5 s LCP 5.0 shttps://bmj.com// https://bmj.com/ — 301 — 258 B — 24 ms — h2https://www.bmj.com/www.bmj.com/ https://www.bmj.com/ — 200 — 23.3 KiB — 65 ms — h2https://www.bmj.com/cdn-cgi/speculationwww.bmj.com/cdn-cgi/speculation https://www.bmj.com/cdn-cgi/speculation — 200 — 232 B — 8 ms — h2https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fthebmj-frontend.bmj.com%2Fnext-resources%2Fthebmj-logo-large.png&w=220&q=75thebmj-frontend.bmj.com/_next/image... https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fthebmj-frontend.bmj.com%2Fnext-resources%2Fthebmj-logo-large.png&w=220&q=75 — 200 — 2.6 KiB — 120 ms — h2https://cookie-cdn.cookiepro.com/scripttemplates/otSDKStub.jscookie-cdn.cookiepro.com/scripttemp... https://cookie-cdn.cookiepro.com/scripttemplates/otSDKStub.js — 200 — 9.3 KiB — 76 ms — h2https://thebmj-frontend.bmj.com/next-resources/oneTrust.jsthebmj-frontend.bmj.com/next-resour... https://thebmj-frontend.bmj.com/next-resources/oneTrust.js — 200 — 610 B — 119 ms — h2https://securepubads.g.doubleclick.net/tag/js/gpt.jssecurepubads.g.doubleclick.net/tag/... https://securepubads.g.doubleclick.net/tag/js/gpt.js — 200 — 33.6 KiB — 101 ms — h3https://www.bmj.com/_next/static/css/187b6a924df2e0f7.csswww.bmj.com/_next/static/css/187b6a... https://www.bmj.com/_next/static/css/187b6a924df2e0f7.css — 200 — 24.2 KiB — 32 ms — h3https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fcomprehensive_school_students_2HTJ336-copy.jpg&w=800&q=75thebmj-frontend.bmj.com/_next/image... https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fcomprehensive_school_students_2HTJ336-copy.jpg&w=800&q=75 — 200 — 24.2 KiB — 265 ms — h2https://cdn.pbgrd.com/core-bmj.js?t=1653636702cdn.pbgrd.com/core-bmj.js?t=1653636... https://cdn.pbgrd.com/core-bmj.js?t=1653636702 — 200 — 4.0 KiB — 88 ms — http/1.1https://www.bmj.com/_next/static/chunks/webpack-6ef43a8d4a395f49.jswww.bmj.com/_next/static/chunks/web... https://www.bmj.com/_next/static/chunks/webpack-6ef43a8d4a395f49.js — 200 — 1.5 KiB — 46 ms — h3https://www.bmj.com/_next/static/chunks/framework-3b5a00d5d7e8d93b.jswww.bmj.com/_next/static/chunks/fra... https://www.bmj.com/_next/static/chunks/framework-3b5a00d5d7e8d93b.js — 200 — 46.1 KiB — 66 ms — h3https://www.bmj.com/_next/static/chunks/main-fc788ce92ccfeb2d.jswww.bmj.com/_next/static/chunks/mai... https://www.bmj.com/_next/static/chunks/main-fc788ce92ccfeb2d.js — 200 — 32.3 KiB — 64 ms — h3https://www.bmj.com/_next/static/chunks/pages/_app-58067fd7f289b1e2.jswww.bmj.com/_next/static/chunks/pag... https://www.bmj.com/_next/static/chunks/pages/_app-58067fd7f289b1e2.js — 200 — 53.3 KiB — 90 ms — h3https://www.bmj.com/_next/static/chunks/100-933a18c4a3ce9023.jswww.bmj.com/_next/static/chunks/100... https://www.bmj.com/_next/static/chunks/100-933a18c4a3ce9023.js — 200 — 2.9 KiB — 82 ms — h3https://www.bmj.com/_next/static/chunks/363-c279d1e5e0049870.jswww.bmj.com/_next/static/chunks/363... https://www.bmj.com/_next/static/chunks/363-c279d1e5e0049870.js — 200 — 5.1 KiB — 81 ms — h3https://www.bmj.com/_next/static/chunks/pages/index-c3741423fcbb2feb.jswww.bmj.com/_next/static/chunks/pag... https://www.bmj.com/_next/static/chunks/pages/index-c3741423fcbb2feb.js — 200 — 6.4 KiB — 82 ms — h3https://www.bmj.com/_next/static/Z44gBmeiSp9a1xlbTWw4j/_buildManifest.jswww.bmj.com/_next/static/Z44gBmeiSp... https://www.bmj.com/_next/static/Z44gBmeiSp9a1xlbTWw4j/_buildManifest.js — 200 — 834 B — 82 ms — h3https://www.bmj.com/_next/static/Z44gBmeiSp9a1xlbTWw4j/_ssgManifest.jswww.bmj.com/_next/static/Z44gBmeiSp... https://www.bmj.com/_next/static/Z44gBmeiSp9a1xlbTWw4j/_ssgManifest.js — 200 — 552 B — 80 ms — h3https://api.altmetric.com/v1/donut/116132730_60.pngapi.altmetric.com/v1/donut/11613273... https://api.altmetric.com/v1/donut/116132730_60.png — 302 — 138 B — 132 ms — h2https://api.altmetric.com/v1/donut/160173974_60.pngapi.altmetric.com/v1/donut/16017397... https://api.altmetric.com/v1/donut/160173974_60.png — 302 — 510 B — 131 ms — h2https://api.altmetric.com/v1/donut/124733966_60.pngapi.altmetric.com/v1/donut/12473396... https://api.altmetric.com/v1/donut/124733966_60.png — 302 — 139 B — 130 ms — h2https://api.altmetric.com/v1/donut/101645304_60.pngapi.altmetric.com/v1/donut/10164530... https://api.altmetric.com/v1/donut/101645304_60.png — 302 — 134 B — 240 ms — h2https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516 — 200 — 10.7 KiB — 92 ms — h2https://analytics.bmj.com/gtm.js?id=GTM-NF7HCLLanalytics.bmj.com/gtm.js?id=GTM-NF7... https://analytics.bmj.com/gtm.js?id=GTM-NF7HCLL — 200 — 200.4 KiB — 383 ms — h2https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fbrazil_person_computer_iStock-1246061014-copy.jpg&w=300&q=75thebmj-frontend.bmj.com/_next/image... https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fbrazil_person_computer_iStock-1246061014-copy.jpg&w=300&q=75 — 200 — 9.3 KiB — 34 ms — h2https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fadditional_therapeutic_strategies_for_alzheimers_disease.jpg&w=300&q=75thebmj-frontend.bmj.com/_next/image... https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fadditional_therapeutic_strategies_for_alzheimers_disease.jpg&w=300&q=75 — 200 — 8.1 KiB — 31 ms — h2https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fwillett_colleague_initiative.jpg&w=300&q=75thebmj-frontend.bmj.com/_next/image... https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fwillett_colleague_initiative.jpg&w=300&q=75 — 200 — 10.8 KiB — 28 ms — h2https://thebmj-frontend.bmj.com/_next/image?url=https%3A%2F%2Fbmj-chicken.bmj.com%2Fthebmj%2Fwp-content%2Fuploads%2Fsites%2F4%2F2026%2F04%2Fteenager_getting_a_vaccine.png&w=720&q=75thebmj-frontend.bmj.com/_next/image... 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— 200 — 177 B — 77 ms — h2https://ep2.adtrafficquality.google/sodar/sodar2/254/runner.htmlep2.adtrafficquality.google/sodar/s... https://ep2.adtrafficquality.google/sodar/sodar2/254/runner.html — 200 — 5.4 KiB — 19 ms — h2https://www.google.com/recaptcha/api2/aframewww.google.com/recaptcha/api2/afram... https://www.google.com/recaptcha/api2/aframe — 200 — 566 B — 48 ms — 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https://ade.googlesyndication.com/ddm/activity/src=13070819;type=counter;cat=allvi0;rcb=13;ord=807689688809;gdpr=1;gdpr_consent=CQjA2wAQjA2wAAcABBENCbFgAAAAAEPgAChQAAAYsAAAACIAAAAAECAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAaYBk-YJklOgiAJghIyDIhNUEg8UxRCghyA2KWYA6eIKAGXayQh_qBYAAA.YAAACHwAAAAA.IMXQKwAFAAcABAAEUAJgAUgB4gD9AQ4AicBN4C2wF4ALzAZIBGYCckE7ATwgnkCfME-wUXgoyCjkFHgUmgpQClcFLQUvgpiCmQFNIKbAqJBUYFSYKlgqxBVoFXoKwAraBW8CuIFcwK7QV4BXoCvkFfgWHAsTBYsFj4LIgu1BdwGIIMRAxcAA;npa=1;u12=https%3A%2F%2Fwww.bmj.com%2F;gdid=dYWJhMj;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=denied;frm=0;_tu=KFA;gtm=45fe64h1v9181807179z876895456za20gzb76895456zd76895456xea;gcs=G101;gcd=13q3r3q2q5l1;dma_cps=-;dma=1;dc_fmt=8;tcfd=10s5a;tag_exp=0~115938466~115938469~117266401;epver=2;~oref=https%3A%2F%2Fwww.bmj.com%2F? — 200 — 401 B — 82 ms — h2https://pagead2.googlesyndication.com/bg/f5QAlvtNIG4WVQkBqopU_UJKye32LJV4C0JimSvBZxA.jspagead2.googlesyndication.com/bg/f5... https://pagead2.googlesyndication.com/bg/f5QAlvtNIG4WVQkBqopU_UJKye32LJV4C0JimSvBZxA.js — 200 — 21.8 KiB — 30 ms — h3https://pagead2.googlesyndication.com/pagead/sodar?id=sodar2&v=254&li=gpt_m202604160201&jk=1693297628601714&rc=pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/sodar?id=sodar2&v=254&li=gpt_m202604160201&jk=1693297628601714&rc= — 204 — 17 B — 45 ms — h3https://dt.adsafeprotected.com/dt?advEntityId=2731174&asId=369a66e0-54d2-0912-5c58-c259bb0e677d&tv=%7Bc:arMLYC,time:794,type:e,sca:%7Bprp:%7Bnot:1,csi:1,msl:0,hdl:1,aps:0,hae:1,ito:1,sec:1%7D,exr:%7Bexs:objectExternal%7D,ifr:%7Bact:1,eff:0%7D,dvw:%7Bwit:10,wot:0%7D,nit:%7Bpqr:prompt,ntr:default%7D,cdc:%5B2,2,2,2,0,0,0,0,0,2,0,2,0,0,2,2,2,2%5D%7D,es:0,sc:1,ha:1,fgad:1,fif:0,gmnp:0,for:1,b11:0,cnod:1,intblk:1,gm:0,slTimes:%7Bi:794,o:0,n:0,pp:0,pm:0%7D,slEvents:%5B%7Bsl:i,t:194,wc:0.0.412.823,ac:NaN.NaN.300.50,am:sp,cc:0.0.300.50,piv:100,obst:0,th:0,reas:,bkn:%7Bpiv:%5B620~100%5D,as:%5B620~300.50%5D%7D%7D%5D,slEventCount:1,em:true,fr:true,e:,tt:rjss,dtt:138,fm:vhs9hZu+11%7C12%7C13%7C14*.2731174-92424455%7C141%7C15%7C161,idMap:14*,rmeas:1,rend:1,renddet:IMG.qs,siq:196,cpli:%5B7,10%5D,cgc:0,cvli:0,ccmp:2,cdop:1,cttd:0,msd:0,ph:13233,igt:1,sis:396%7D&br=cdt.adsafeprotected.com/dt?advEntity... https://dt.adsafeprotected.com/dt?advEntityId=2731174&asId=369a66e0-54d2-0912-5c58-c259bb0e677d&tv=%7Bc:arMLYC,time:794,type:e,sca:%7Bprp:%7Bnot:1,csi:1,msl:0,hdl:1,aps:0,hae:1,ito:1,sec:1%7D,exr:%7Bexs:objectExternal%7D,ifr:%7Bact:1,eff:0%7D,dvw:%7Bwit:10,wot:0%7D,nit:%7Bpqr:prompt,ntr:default%7D,cdc:%5B2,2,2,2,0,0,0,0,0,2,0,2,0,0,2,2,2,2%5D%7D,es:0,sc:1,ha:1,fgad:1,fif:0,gmnp:0,for:1,b11:0,cnod:1,intblk:1,gm:0,slTimes:%7Bi:794,o:0,n:0,pp:0,pm:0%7D,slEvents:%5B%7Bsl:i,t:194,wc:0.0.412.823,ac:NaN.NaN.300.50,am:sp,cc:0.0.300.50,piv:100,obst:0,th:0,reas:,bkn:%7Bpiv:%5B620~100%5D,as:%5B620~300.50%5D%7D%7D%5D,slEventCount:1,em:true,fr:true,e:,tt:rjss,dtt:138,fm:vhs9hZu+11%7C12%7C13%7C14*.2731174-92424455%7C141%7C15%7C161,idMap:14*,rmeas:1,rend:1,renddet:IMG.qs,siq:196,cpli:%5B7,10%5D,cgc:0,cvli:0,ccmp:2,cdop:1,cttd:0,msd:0,ph:13233,igt:1,sis:396%7D&br=c — 200 — 177 B — 71 ms — h2https://ep2.adtrafficquality.google/generate_204?l0k1Dgep2.adtrafficquality.google/generat... https://ep2.adtrafficquality.google/generate_204?l0k1Dg — 204 — 10 B — 8 ms — h3https://dt.adsafeprotected.com/dt?advEntityId=2731174&asId=369a66e0-54d2-0912-5c58-c259bb0e677d&tv=%7Bc:arMM5u,pingTime:1,time:1220,type:p,clog:%5B%7Bpiv:100,vs:i,r:,w:300,h:50,t:194%7D%5D,es:0,sc:1,ha:1,fgad:1,fif:0,gmnp:0,for:1,b11:0,cnod:1,intblk:1,gm:0,slTimes:%7Bi:1220,o:0,n:0,pp:0,pm:0%7D,slEvents:%5B%7Bsl:i,t:194,wc:0.0.412.823,ac:NaN.NaN.300.50,am:sp,cc:0.0.300.50,piv:100,obst:0,th:0,reas:,bkn:%7Bpiv:%5B1045~100%5D,as:%5B1045~300.50%5D%7D%7D%5D,slEventCount:1,em:true,fr:true,e:,tt:rjss,dtt:75,fm:vhs9hZu+11%7C12%7C13%7C14*.2731174-92424455%7C141%7C15%7C161,idMap:14*,rmeas:1,rend:1,renddet:IMG.qs,siq:196,cpli:%5B7,10%5D,cgc:0,cvli:0,ccmp:2,cdop:1,cttd:0,msd:0,ph:13233,igt:1,sis:396%7D&br=cdt.adsafeprotected.com/dt?advEntity... https://dt.adsafeprotected.com/dt?advEntityId=2731174&asId=369a66e0-54d2-0912-5c58-c259bb0e677d&tv=%7Bc:arMM5u,pingTime:1,time:1220,type:p,clog:%5B%7Bpiv:100,vs:i,r:,w:300,h:50,t:194%7D%5D,es:0,sc:1,ha:1,fgad:1,fif:0,gmnp:0,for:1,b11:0,cnod:1,intblk:1,gm:0,slTimes:%7Bi:1220,o:0,n:0,pp:0,pm:0%7D,slEvents:%5B%7Bsl:i,t:194,wc:0.0.412.823,ac:NaN.NaN.300.50,am:sp,cc:0.0.300.50,piv:100,obst:0,th:0,reas:,bkn:%7Bpiv:%5B1045~100%5D,as:%5B1045~300.50%5D%7D%7D%5D,slEventCount:1,em:true,fr:true,e:,tt:rjss,dtt:75,fm:vhs9hZu+11%7C12%7C13%7C14*.2731174-92424455%7C141%7C15%7C161,idMap:14*,rmeas:1,rend:1,renddet:IMG.qs,siq:196,cpli:%5B7,10%5D,cgc:0,cvli:0,ccmp:2,cdop:1,cttd:0,msd:0,ph:13233,igt:1,sis:396%7D&br=c — 200 — 177 B — 77 ms — h2https://dt.adsafeprotected.com/dt?advEntityId=2731174&asId=369a66e0-54d2-0912-5c58-c259bb0e677d&tv=%7Bc:arMM5x,pingTime:1,time:1223,type:pf,clog:%5B%7Bpiv:100,vs:i,r:,w:300,h:50,t:194%7D%5D,es:0,sc:1,ha:1,fgad:1,fif:0,gmnp:0,for:1,b11:0,cnod:1,intblk:1,gm:0,slTimes:%7Bi:1223,o:0,n:0,pp:0,pm:0%7D,slEvents:%5B%7Bsl:i,t:194,wc:0.0.412.823,ac:NaN.NaN.300.50,am:sp,cc:0.0.300.50,piv:100,obst:0,th:0,reas:,bkn:%7Bpiv:%5B1048~100%5D,as:%5B1048~300.50%5D%7D%7D%5D,slEventCount:1,em:true,fr:true,e:,tt:rjss,dtt:75,fm:vhs9hZu+11%7C12%7C13%7C14*.2731174-92424455%7C141%7C15%7C161,idMap:14*,rmeas:1,rend:1,renddet:IMG.qs,siq:196,cpli:%5B7,10%5D,cgc:0,cvli:0,ccmp:2,cdop:1,cttd:0,msd:0,ph:13233,igt:1,sis:396%7D&br=cdt.adsafeprotected.com/dt?advEntity... https://dt.adsafeprotected.com/dt?advEntityId=2731174&asId=369a66e0-54d2-0912-5c58-c259bb0e677d&tv=%7Bc:arMM5x,pingTime:1,time:1223,type:pf,clog:%5B%7Bpiv:100,vs:i,r:,w:300,h:50,t:194%7D%5D,es:0,sc:1,ha:1,fgad:1,fif:0,gmnp:0,for:1,b11:0,cnod:1,intblk:1,gm:0,slTimes:%7Bi:1223,o:0,n:0,pp:0,pm:0%7D,slEvents:%5B%7Bsl:i,t:194,wc:0.0.412.823,ac:NaN.NaN.300.50,am:sp,cc:0.0.300.50,piv:100,obst:0,th:0,reas:,bkn:%7Bpiv:%5B1048~100%5D,as:%5B1048~300.50%5D%7D%7D%5D,slEventCount:1,em:true,fr:true,e:,tt:rjss,dtt:75,fm:vhs9hZu+11%7C12%7C13%7C14*.2731174-92424455%7C141%7C15%7C161,idMap:14*,rmeas:1,rend:1,renddet:IMG.qs,siq:196,cpli:%5B7,10%5D,cgc:0,cvli:0,ccmp:2,cdop:1,cttd:0,msd:0,ph:13233,igt:1,sis:396%7D&br=c — 200 — 177 B — 73 ms — h2https://ep1.adtrafficquality.google/pagead/sodar?id=sodar2&v=254&t=2&li=gpt_m202604160201&jk=1693297628601714&bg=!QEOlQyHNAAY2C5OeFgs7AEcBe5WfOE8DQO27wBeFP6Ky2g7xhqj9vQyR1M5dlG4ooVIc4V-W3d94ITg_4VxWbgZwn-BhP1z2d2bt13FxJxkoJqVUdfysawIAAABxUgAAAAZoAQd-ADbp4A-z-XZIi5meFtgHk8xO4hrUkuurP3RcYJfXscN5c4FmcHwO2qKBDz-bOod8Gh_LXs663KeZAqDoA0L8uppJlyyfMHKCavIhlwMULXPlj4hrhwvRGPzA9RncKHm1JFXAKl5hfT3M3z_bcmb1SO77ZBknPyECGi9I0uJNqUZLO8TFkc6O9xmQ3QAC5KyK7Ozd0s729AJ-nexd9fsiu3tIc85QVpbenQ4KIDXWlSXE-t_NSI3RLg3Zz_Amvy2EhXBjCRRt4GHl1GYxH9u1DUB3zQmgU9BTBuB0uMYA0AtGk8oQv63Gg1ZEoauiI3b3rPVpVeM7WYOnueXweh877rbjguXqdGEjzoJ3nbqOhSmmuDJfXqfyAoPiZgPmXejfr644MUREiWnt5N3sqijqQKRSVXhxfFrpHRLBuzBEgV8acjyvMAKV4lXj9rGjFhe2d4I7iVzpclFYzOo4XDKyjRjzIRaMIBwsUiH0AA0YmOUfjsfaRGFJH0SZ0H2EbVlJ7eLBlJbm-PxzqNLsZ4zpU3d89LfD-BcePkbpGvk1R6AR80R2H-ERYMLGuvs8wEC-CohPhChLcHXo1p3pZdzzg4ABvjntbGLtKwFy_Bf-0l17EtY2hULK8uQzeS172-UVetrJiVgDB6gzZbIKRdNe2CH1ZOEbtVv5kL4z2MAYLa6dyRCInWt9bQj1NrOYMP1_3j2e3Q2BvkVfXULoLF833bUFy3VrnC2DKDEVyHjvGwG1Z_KQnnC_nMm6wgaIM8y0zAgbC_yyRrxj31nbMKOAKByHBWcHWXlSav8vpCkrf1ky5SuqLK7WUIFSctGkbqyIt-mX8fdBJ1nVWuCDYvBIkVP_pc-BVwfAuyZGsJqRvXhpH8caG8oq2EJxgP72Z4LLHJ1BEIZ3vkCnzN7Otm4Zxyp5XONzmqIl1WP_6G63fDZm-jWsIKwETiY4_JKw6v2OhbUeiVavxjqh_9sep1.adtrafficquality.google/pagead/... https://ep1.adtrafficquality.google/pagead/sodar?id=sodar2&v=254&t=2&li=gpt_m202604160201&jk=1693297628601714&bg=!QEOlQyHNAAY2C5OeFgs7AEcBe5WfOE8DQO27wBeFP6Ky2g7xhqj9vQyR1M5dlG4ooVIc4V-W3d94ITg_4VxWbgZwn-BhP1z2d2bt13FxJxkoJqVUdfysawIAAABxUgAAAAZoAQd-ADbp4A-z-XZIi5meFtgHk8xO4hrUkuurP3RcYJfXscN5c4FmcHwO2qKBDz-bOod8Gh_LXs663KeZAqDoA0L8uppJlyyfMHKCavIhlwMULXPlj4hrhwvRGPzA9RncKHm1JFXAKl5hfT3M3z_bcmb1SO77ZBknPyECGi9I0uJNqUZLO8TFkc6O9xmQ3QAC5KyK7Ozd0s729AJ-nexd9fsiu3tIc85QVpbenQ4KIDXWlSXE-t_NSI3RLg3Zz_Amvy2EhXBjCRRt4GHl1GYxH9u1DUB3zQmgU9BTBuB0uMYA0AtGk8oQv63Gg1ZEoauiI3b3rPVpVeM7WYOnueXweh877rbjguXqdGEjzoJ3nbqOhSmmuDJfXqfyAoPiZgPmXejfr644MUREiWnt5N3sqijqQKRSVXhxfFrpHRLBuzBEgV8acjyvMAKV4lXj9rGjFhe2d4I7iVzpclFYzOo4XDKyjRjzIRaMIBwsUiH0AA0YmOUfjsfaRGFJH0SZ0H2EbVlJ7eLBlJbm-PxzqNLsZ4zpU3d89LfD-BcePkbpGvk1R6AR80R2H-ERYMLGuvs8wEC-CohPhChLcHXo1p3pZdzzg4ABvjntbGLtKwFy_Bf-0l17EtY2hULK8uQzeS172-UVetrJiVgDB6gzZbIKRdNe2CH1ZOEbtVv5kL4z2MAYLa6dyRCInWt9bQj1NrOYMP1_3j2e3Q2BvkVfXULoLF833bUFy3VrnC2DKDEVyHjvGwG1Z_KQnnC_nMm6wgaIM8y0zAgbC_yyRrxj31nbMKOAKByHBWcHWXlSav8vpCkrf1ky5SuqLK7WUIFSctGkbqyIt-mX8fdBJ1nVWuCDYvBIkVP_pc-BVwfAuyZGsJqRvXhpH8caG8oq2EJxgP72Z4LLHJ1BEIZ3vkCnzN7Otm4Zxyp5XONzmqIl1WP_6G63fDZm-jWsIKwETiY4_JKw6v2OhbUeiVavxjqh_9s — 204 — 17 B — 49 ms — h3
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 8317ms · 1591KB · $110/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 1417ms
Transfer 188 KB
Unused 52%
Monthly Cost $19/mo
Unattributable
Other
Costly
Execution 1014ms
Transfer 0 KB
Monthly Cost $13/mo
www.bmj.com
Other
Costly
Execution 775ms
Transfer 23 KB
Monthly Cost $10/mo
analytics.bmj.com
Other
Costly
Execution 635ms
Transfer 200 KB
Unused 33%
Monthly Cost $8/mo
cookie-cdn.cookiepro.com
Other
Costly
Execution 634ms
Transfer 18 KB
Monthly Cost $8/mo
cookie-cdn.cookiepro.com
Other
Costly
Execution 484ms
Transfer 131 KB
Unused 48%
Monthly Cost $6/mo
analytics.bmj.com
Other
Costly
Execution 461ms
Transfer 180 KB
Unused 39%
Monthly Cost $6/mo
jsconfig.adsafeprotected.com
Other
Costly
Execution 395ms
Transfer 3 KB
Monthly Cost $5/mo
pagead2.googlesyndication.com
Other
Costly
Execution 393ms
Transfer 73 KB
Unused 41%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 333ms
Transfer 152 KB
Unused 42%
Monthly Cost $4/mo
www.bmj.com
Other
Costly
Execution 330ms
Transfer 46 KB
Monthly Cost $4/mo
analytics.bmj.com
Other
Costly
Execution 311ms
Transfer 195 KB
Unused 40%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 283ms
Transfer 130 KB
Unused 50%
Monthly Cost $4/mo
static.adsafeprotected.com
Other
Costly
Execution 274ms
Transfer 23 KB
Monthly Cost $4/mo
www.bmj.com
Other
Optional
Execution 131ms
Transfer 53 KB
Monthly Cost $2/mo
fw.adsafeprotected.com
Other
Optional
Execution 116ms
Transfer 92 KB
Unused 40%
Monthly Cost $2/mo
cookie-cdn.cookiepro.com
Other
Optional
Execution 108ms
Transfer 9 KB
Monthly Cost $1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 94ms
Transfer 34 KB
Monthly Cost $1/mo
www.bmj.com
Other
Optional
Execution 77ms
Transfer 32 KB
Monthly Cost $1/mo
ep2.adtrafficquality.google
Other
Optional
Execution 54ms
Transfer 8 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • securepubads.g.doubleclick.net adds 1417ms and costs ~$19/month
  • Unattributable adds 1014ms and costs ~$13/month
  • www.bmj.com adds 775ms and costs ~$10/month
  • analytics.bmj.com adds 635ms and costs ~$8/month
  • cookie-cdn.cookiepro.com adds 634ms and costs ~$8/month
  • cookie-cdn.cookiepro.com adds 484ms and costs ~$6/month
  • analytics.bmj.com adds 461ms and costs ~$6/month
  • jsconfig.adsafeprotected.com adds 395ms and costs ~$5/month
  • pagead2.googlesyndication.com adds 393ms and costs ~$5/month
  • Google Tag Manager adds 333ms and costs ~$4/month
  • www.bmj.com adds 330ms and costs ~$4/month
  • analytics.bmj.com adds 311ms and costs ~$4/month
  • Google Tag Manager adds 283ms and costs ~$4/month
  • static.adsafeprotected.com adds 274ms and costs ~$4/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

securepubads.g.doubleclick.net takes 1417ms 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 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

Unattributable takes 1014ms 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.bmj.com takes 775ms 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

analytics.bmj.com takes 635ms 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

cookie-cdn.cookiepro.com takes 634ms 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

cookie-cdn.cookiepro.com takes 484ms 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

analytics.bmj.com takes 461ms 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

jsconfig.adsafeprotected.com takes 395ms 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 393ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 333ms 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.bmj.com takes 330ms 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

analytics.bmj.com takes 311ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 283ms 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

static.adsafeprotected.com takes 274ms 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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