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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
65
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.94 s

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

4.98 s

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

76 ms

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

0.002

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

2.19 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.

5.14 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
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
4.5 MB transferred, 87 requests
FIX
4.5 MB transferred, 87 requests
Critical::
Page weighs 8.7 MB (4.5 MB transferred)
Warning::
Images are 2.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.2 MB
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Info::
Fonts are 448 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 448 KB
Info::
CSS is 243 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 243 KB
Info::
87 HTTP requests
Info::
Estimated 0.94 g CO2 per page load
4.5 MB / 2.4 MB budget
4.5 MB transferred
87 requests
0.94 g CO2 per page load
Images 2.2 MiB 49%
JavaScript 1.4 MiB 31%
Fonts 447.7 KiB 10%
CSS 243.1 KiB 5%
Other 99.7 KiB 2%
Other 80.4 KiB 2%
HTML 22.3 KiB 0%
Other 3.6 KiB 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

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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 (4.5 MiB of 4.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
35 scripts, 621 KB unused
FIX
35 scripts, 621 KB unused
Warning::
https://www.sagepub.com/sfrenderer/scripts/HawkSea...: 295 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn-ukwest.onetrust.com/scripttemplates/20...: 75 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://analytics.sagepub.com/gtag/js?id=G-60R758K...: 64 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnjs.cloudflare.com/ajax/libs/lottie-web/...: 54 KB unused (87%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://analytics.sagepub.com/gtm.js?id=GTM-5R9QN8: 50 KB unused (28%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 621 KB
621 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.sagepub.com/sfrenderer/scripts/HawkSearch/vendor.bundle.js?assembly_name=CoreWeb.Sitefinity.Widgets&package_name=Global&version=921499994426 KB295 KB (69%)✓3rd
https://cdn-ukwest.onetrust.com/scripttemplates/202511.1.0/otBannerSdk.js124 KB75 KB (60%)✓3rd
https://analytics.sagepub.com/gtag/js?id=G-60R758KFDG&cx=c&gtm=4e64f0&sign=b0002113e2ec23f6059c5e43569baa9ba3206c46f1ccc97881bcd4d295426103_20260416172 KB64 KB (38%)✓3rd
https://cdnjs.cloudflare.com/ajax/libs/lottie-web/5.12.2/lottie.min.js63 KB54 KB (87%)✓3rd
https://analytics.sagepub.com/gtm.js?id=GTM-5R9QN8176 KB50 KB (28%)✓3rd
https://eu-assets.i.posthog.com/static/array.js67 KB36 KB (54%)✓3rd
https://eu-assets.i.posthog.com/static/surveys.js?v=1.369.032 KB25 KB (78%)✓3rd
https://www.sagepub.com/sfrenderer/scripts/bootstrap.bundle.min.js?package_name=Global&version=-57198086227 KB21 KB (81%)✓3rd
https://cdn.insight.sitefinity.com/sdk/sitefinity-insight-client.min.3.1.44.js11 KB—✓3rd
https://www.sagepub.com/global/js/main.min.js?v=0AkU1zgv41Z2H9zyt4tEvFVdgpAYIT8HmGsofq_yp8A7 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
87 resources · 4.5 MB · 621 KB savings available
FIX
87 resources · 4.5 MB · 621 KB savings available
Warning::
Page weight 3.5 MB over 1MB target
Got: 4.5 MB Expected: ≤ 1 MB
Info::
~621 KB of savings available
Warning::
86 third-party resources (100% of weight)
Info::
4 resources over 200KB
87 resources · 4.5 MiB · 86 third-party 3.5 MiB over 1MB target
Image 51% · 2.3 MiB
JavaScript 32% · 1.4 MiB
Font 10% · 447.7 KiB
CSS 5% · 247.7 KiB
Other 1% · 54.5 KiB
Document 0% · 22.5 KiB

~621.0 KiB of savings available

Remove unused JavaScript: 621.0 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 2.2 MB
0 oversized -0 KB
20 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
810ms total JS execution
REVIEW
810ms total JS execution
Info::
Unattributable: 195ms CPU time
Info::
https://www.sagepub.com/: 181ms CPU time
Info::
https://analytics.sagepub.com/gtm.js?id=GTM-5R9QN8: 146ms CPU time
Info::
https://www.sagepub.com/sfrenderer/scripts/lazy-co...: 93ms CPU time
Info::
https://www.sagepub.com/sfrenderer/scripts/HawkSea...: 69ms CPU time
Warning::
Third-party scripts: 810ms (100% of total)

Main Thread Breakdown

Script Evaluation 49% Other 19% Script Parsing & Compilation 12% Style & Layout 12%
ScriptTotalScriptingParse/CompileParty
Unattributable195ms25ms0ms3rd
https://www.sagepub.com/181ms11ms9ms3rd
https://analytics.sagepub.com/gtm.js?id=GTM-5R9QN8146ms126ms17ms3rd
https://www.sagepub.com/sfrenderer/scripts/lazy-components.min.js93ms86ms0ms3rd
https://www.sagepub.com/sfrenderer/scripts/HawkSearch/vendor.bundle.js?assembly_name=CoreWeb.Sitefinity.Widgets&package_name=Global&version=92149999469ms35ms34ms3rd
https://analytics.sagepub.com/gtag/js?id=G-60R758KFDG&cx=c&gtm=4e64f0&sign=b0002113e2ec23f6059c5e43569baa9ba3206c46f1ccc97881bcd4d295426103_2026041669ms55ms13ms3rd
https://eu-assets.i.posthog.com/static/array.js59ms53ms5ms3rd
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
9 fonts (448 KB)
PASS
9 fonts (448 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

448 KB total

Render-blocking

0

of 9

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 1.9 s LCP 5.0 shttps://www.sagepub.com/global/styles/fonts/SagePeak-Semibold.woff2SagePeak-Semibold.woff2 https://www.sagepub.com/global/styles/fonts/SagePeak-Semibold.woff2 — 38.2 KiB — 163 ms — font-display: swaphttps://www.sagepub.com/global/styles/fonts/SagePeak-Regular.woff2SagePeak-Regular.woff2 https://www.sagepub.com/global/styles/fonts/SagePeak-Regular.woff2 — 37.1 KiB — 170 ms — font-display: swaphttps://www.sagepub.com/global/styles/fonts/OpenSans-Regular.woff2OpenSans-Regular.woff2 https://www.sagepub.com/global/styles/fonts/OpenSans-Regular.woff2 — 47.4 KiB — 168 ms — font-display: swaphttps://www.sagepub.com/global/styles/fonts/peak-extrabold-webfont.woff2peak-extrabold-webfont.... https://www.sagepub.com/global/styles/fonts/peak-extrabold-webfont.woff2 — 14.7 KiB — 269 ms — font-display: swaphttps://www.sagepub.com/global/styles/fonts/bootstrap-icons.woff2?24e3eb84d0bcaf83d77f904c78ac1f47bootstrap-icons.woff2 https://www.sagepub.com/global/styles/fonts/bootstrap-icons.woff2?24e3eb84d0bcaf83d77f904c78ac1f47 — 127.8 KiB — 276 ms — font-display: swaphttps://www.sagepub.com/global/styles/fonts/OpenSans-SemiBold.woff2OpenSans-SemiBold.woff2 https://www.sagepub.com/global/styles/fonts/OpenSans-SemiBold.woff2 — 47.4 KiB — 273 ms — font-display: swaphttps://www.sagepub.com/global/styles/fonts/SagePeak-SemiboldItalic.woff2SagePeak-SemiboldItalic... https://www.sagepub.com/global/styles/fonts/SagePeak-SemiboldItalic.woff2 — 38.3 KiB — 311 ms — font-display: swaphttps://www.sagepub.com/global/styles/fonts/OpenSans-Bold.woff2OpenSans-Bold.woff2 https://www.sagepub.com/global/styles/fonts/OpenSans-Bold.woff2 — 47.4 KiB — 160 ms — font-display: swaphttps://www.sagepub.com/global/styles/fonts/OpenSans-Italic.woff2OpenSans-Italic.woff2 https://www.sagepub.com/global/styles/fonts/OpenSans-Italic.woff2 — 49.5 KiB — 377 ms — font-display: swap
SagePeak-Semibold.woff2 woff2 swap
Size 38 KB
Load time 163 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
SagePeak-Regular.woff2 woff2 swap
Size 37 KB
Load time 170 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
OpenSans-Regular.woff2 woff2 swap
Size 47 KB
Load time 168 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
peak-extrabold-webfont.... woff2 swap
Size 15 KB
Load time 269 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
bootstrap-icons.woff2 woff2 swap
Size 128 KB
Load time 276 ms
Start 1.4 s
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
OpenSans-SemiBold.woff2 woff2 swap
Size 47 KB
Load time 273 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
SagePeak-SemiboldItalic... woff2 swap
Size 38 KB
Load time 311 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
OpenSans-Bold.woff2 woff2 swap
Size 47 KB
Load time 160 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
OpenSans-Italic.woff2 woff2 swap
Size 49 KB
Load time 377 ms
Start 2.0 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)

Fixing the unchecked items could save ~64 KB and ~128 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
Network Waterfall
87 requests over 3127ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 1.9 s LCP 5.0 shttps://sagepub.com// https://sagepub.com/ — 301 — 102 B — 468 ms — h2https://www.sagepub.com/www.sagepub.com/ https://www.sagepub.com/ — 200 — 22.3 KiB — 314 ms — h2https://cdn-ukwest.onetrust.com/scripttemplates/otSDKStub.jscdn-ukwest.onetrust.com/scripttempl... https://cdn-ukwest.onetrust.com/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 103 ms — h2https://www.sagepub.com/global/styles/main.min.css?v=8yb5ornqfvaBydN8fMG4iATbZzA7PNDLDLVrPsO0eFcwww.sagepub.com/global/styles/main.... https://www.sagepub.com/global/styles/main.min.css?v=8yb5ornqfvaBydN8fMG4iATbZzA7PNDLDLVrPsO0eFc — 200 — 243.1 KiB — 620 ms — h2https://www.sagepub.com/sfrenderer/scripts/DarkModeToggle/default.min.js?assembly_name=CoreWeb.Sitefinity.Widgets&package_name=Global&version=921499994www.sagepub.com/sfrenderer/scripts/... https://www.sagepub.com/sfrenderer/scripts/DarkModeToggle/default.min.js?assembly_name=CoreWeb.Sitefinity.Widgets&package_name=Global&version=921499994 — 200 — 888 B — 159 ms — h2https://cdn-ukwest.onetrust.com/consent/01903b90-3e97-7898-87a2-6ece9db5ebc6/01903b90-3e97-7898-87a2-6ece9db5ebc6.jsoncdn-ukwest.onetrust.com/consent/019... https://cdn-ukwest.onetrust.com/consent/01903b90-3e97-7898-87a2-6ece9db5ebc6/01903b90-3e97-7898-87a2-6ece9db5ebc6.json — 200 — 2.3 KiB — 84 ms — h2https://www.google.com/books/jsapi.jswww.google.com/books/jsapi.js https://www.google.com/books/jsapi.js — 302 — 18 B — 221 ms — h3https://www.sagepub.com/global/js/coreweb-design.js?v=u2-_bVlh3glW7GR3BaIQ_HlSlUNp7r5IWvmM0uQ_ymgwww.sagepub.com/global/js/coreweb-d... https://www.sagepub.com/global/js/coreweb-design.js?v=u2-_bVlh3glW7GR3BaIQ_HlSlUNp7r5IWvmM0uQ_ymg — 200 — 12.1 KiB — 474 ms — h2https://www.sagepub.com/global/js/main.min.js?v=0AkU1zgv41Z2H9zyt4tEvFVdgpAYIT8HmGsofq_yp8Awww.sagepub.com/global/js/main.min.... https://www.sagepub.com/global/js/main.min.js?v=0AkU1zgv41Z2H9zyt4tEvFVdgpAYIT8HmGsofq_yp8A — 200 — 6.9 KiB — 474 ms — h2https://cdnjs.cloudflare.com/ajax/libs/lottie-web/5.12.2/lottie.min.jscdnjs.cloudflare.com/ajax/libs/lott... https://cdnjs.cloudflare.com/ajax/libs/lottie-web/5.12.2/lottie.min.js — 200 — 62.9 KiB — 84 ms — h3https://www.sagepub.com/WebResource.axd?d=NjxTqR2bqTw1rewxxlkHPj11z54WYQDTslIsMCe95Z_VLnRfBanMVhetl4clzaW3GIxskyG9nR51oP7TRR1zixdUnCnwb4-efXQQ6pw1lV3xXfowJrG0wiBo7hKO3sefQnR5E6jZgqK398iS0FdmP-rYRzutU4RcRVOHFFb50UptVAlWpzoDJ_9FdutxMrHMfq-vIn4_0BZEkKS82dCDH-ucLILDd1zO59sBjeswa0o1&t=639013907760000000www.sagepub.com/WebResource.axd?d=N... https://www.sagepub.com/WebResource.axd?d=NjxTqR2bqTw1rewxxlkHPj11z54WYQDTslIsMCe95Z_VLnRfBanMVhetl4clzaW3GIxskyG9nR51oP7TRR1zixdUnCnwb4-efXQQ6pw1lV3xXfowJrG0wiBo7hKO3sefQnR5E6jZgqK398iS0FdmP-rYRzutU4RcRVOHFFb50UptVAlWpzoDJ_9FdutxMrHMfq-vIn4_0BZEkKS82dCDH-ucLILDd1zO59sBjeswa0o1&t=639013907760000000 — 200 — 6.9 KiB — 473 ms — h2https://www.sagepub.com/WebResource.axd?d=HtQyXelCu6mzSPcVcvK_Bl3WywIB65351hXFDBfmOR8kk90ePBZJW73D0vEBjH2zPW1qnl8_gIawSb27H8b9HOM5q5X60nn8pmG_eeWNHPqWjpO7UYiLuq3ywEb1DmK47QUrnqeW-HA36UgWp3Q2Oyyq5mJilMHGzy6K1PFxxvQBQ6nF9UVJqqw4_UFvBiHTInztiGzk7YH8W-z2K1NA6iOVp463BvonWfvSAOG2Iik1&t=639013907060000000www.sagepub.com/WebResource.axd?d=H... https://www.sagepub.com/WebResource.axd?d=HtQyXelCu6mzSPcVcvK_Bl3WywIB65351hXFDBfmOR8kk90ePBZJW73D0vEBjH2zPW1qnl8_gIawSb27H8b9HOM5q5X60nn8pmG_eeWNHPqWjpO7UYiLuq3ywEb1DmK47QUrnqeW-HA36UgWp3Q2Oyyq5mJilMHGzy6K1PFxxvQBQ6nF9UVJqqw4_UFvBiHTInztiGzk7YH8W-z2K1NA6iOVp463BvonWfvSAOG2Iik1&t=639013907060000000 — 200 — 7.5 KiB — 473 ms — h2https://www.sagepub.com/sfrenderer/scripts/lazy-components.min.jswww.sagepub.com/sfrenderer/scripts/... https://www.sagepub.com/sfrenderer/scripts/lazy-components.min.js — 200 — 1.1 KiB — 473 ms — h2https://www.sagepub.com/sfrenderer/scripts/bootstrap.bundle.min.js?package_name=Global&version=-571980862www.sagepub.com/sfrenderer/scripts/... https://www.sagepub.com/sfrenderer/scripts/bootstrap.bundle.min.js?package_name=Global&version=-571980862 — 200 — 26.6 KiB — 478 ms — h2https://www.sagepub.com/sfrenderer/scripts/HawkSearch/hawksearch-redirect.min.js?assembly_name=CoreWeb.Sitefinity.Widgets&package_name=Global&version=921499994www.sagepub.com/sfrenderer/scripts/... https://www.sagepub.com/sfrenderer/scripts/HawkSearch/hawksearch-redirect.min.js?assembly_name=CoreWeb.Sitefinity.Widgets&package_name=Global&version=921499994 — 200 — 619 B — 478 ms — 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h2https://eu.i.posthog.com/e/?ip=0&_=1776362420395&ver=1.369.0&compression=gzip-jseu.i.posthog.com/e/?ip=0&_=17763624... https://eu.i.posthog.com/e/?ip=0&_=1776362420395&ver=1.369.0&compression=gzip-js — 200 — 289 B — 137 ms — h2https://eu-assets.i.posthog.com/static/surveys.js?v=1.369.0eu-assets.i.posthog.com/static/surv... https://eu-assets.i.posthog.com/static/surveys.js?v=1.369.0 — 200 — 32.0 KiB — 31 ms — h2https://www.sagepub.com/global/styles/images/user-signedout.svgwww.sagepub.com/global/styles/image... https://www.sagepub.com/global/styles/images/user-signedout.svg — 200 — 863 B — 159 ms — h2https://eu.i.posthog.com/api/surveys/?token=phc_lRjLLAqY28nfIBUvd29OG31zhVGnTB70hKWzE6uAtDS&ip=0&_=1776362420536&ver=1.369.0eu.i.posthog.com/api/surveys/?token... https://eu.i.posthog.com/api/surveys/?token=phc_lRjLLAqY28nfIBUvd29OG31zhVGnTB70hKWzE6uAtDS&ip=0&_=1776362420536&ver=1.369.0 — 200 — 1.5 KiB — 77 ms — 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h2https://www.sagepub.com/global/icons/favicon.icowww.sagepub.com/global/icons/favico... https://www.sagepub.com/global/icons/favicon.ico — 200 — 99.6 KiB — 163 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 810ms · 865KB · £4/mo
Unattributable
Other
Optional
Execution 195ms
Transfer 0 KB
Monthly Cost £1/mo
www.sagepub.com
Other
Optional
Execution 181ms
Transfer 22 KB
Monthly Cost £1/mo
analytics.sagepub.com
Other
Optional
Execution 146ms
Transfer 176 KB
Unused 28%
Monthly Cost £1/mo
www.sagepub.com
Other
Optional
Execution 93ms
Transfer 1 KB
Monthly Cost £0/mo
www.sagepub.com
Other
Optional
Execution 69ms
Transfer 426 KB
Unused 69%
Monthly Cost £0/mo
analytics.sagepub.com
Other
Optional
Execution 69ms
Transfer 172 KB
Unused 38%
Monthly Cost £0/mo
eu-assets.i.posthog.com
Other
Optional
Execution 59ms
Transfer 67 KB
Unused 54%
Monthly Cost £0/mo

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

69% of www.sagepub.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

54% of eu-assets.i.posthog.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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