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https://space.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
6
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
78
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
87
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.
85
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.

1.17 s

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

1.94 s

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

36 ms

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

0.204

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

1.51 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.

3.28 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 2 REVIEW 6 FIX
D
Page Weight Budget
Action
2.5 MB transferred, 106 requests
FIX
2.5 MB transferred, 106 requests
Warning::
Page weighs 8.0 MB (2.5 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::
106 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.51 g CO2 per page load
2.5 MB / 2.4 MB budget
2.5 MB transferred
106 requests
0.51 g CO2 per page load
JavaScript 1.6 MiB 65%
Images 442.4 KiB 18%
HTML 249.8 KiB 10%
Fonts 68.9 KiB 3%
CSS 64.8 KiB 3%
Other 27.2 KiB 1%
Other 17.6 KiB 1%
Other 4.3 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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 (2.5 MiB of 2.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3497ms total JS execution
FIX
3497ms total JS execution
Warning::
https://www.space.com/: 2596ms CPU time
Warning::
Unattributable: 384ms CPU time
Info::
https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-...: 112ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-WHL...: 99ms CPU time
Info::
https://www.space.com/vite/assets/vendor-DH-HcC7C....: 96ms CPU time
Warning::
Third-party scripts: 3497ms (100% of total)

Main Thread Breakdown

Other 48% Script Evaluation 30% Style & Layout 11% Rendering 5% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://www.space.com/2596ms323ms24ms3rd
Unattributable384ms133ms0ms3rd
https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-uspapi.090eccada574d39af6f8.bundle.js112ms102ms8ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C&gtm=4e64h199ms85ms14ms3rd
https://www.space.com/vite/assets/vendor-DH-HcC7C.js96ms91ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WWBWRXL91ms74ms12ms3rd
https://www.googletagmanager.com/gtag/js?id=G-NHWGPTEENX&cx=c&gtm=4e64h161ms49ms12ms3rd
https://bordeaux.futurecdn.net/bordeaux.js58ms44ms13ms3rd
F
JS Bundles
Action
55 scripts, 618 KB unused
FIX
55 scripts, 618 KB unused
Warning::
https://bordeaux.futurecdn.net/bordeaux.js: 90 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://vanilla.futurecdn.net/space/1610431/media/...: 85 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WHL...: 83 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 70 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-NHWG...: 60 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 618 KB
618 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://bordeaux.futurecdn.net/bordeaux.js159 KB90 KB (57%)✓3rd
https://vanilla.futurecdn.net/space/1610431/media/shared/js/bundle.connect.js139 KB85 KB (62%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C&gtm=4e64h1166 KB83 KB (50%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TF5X74CL&gtm=4e64h1112 KB70 KB (63%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-NHWGPTEENX&cx=c&gtm=4e64h1145 KB60 KB (41%)✓3rd
https://search-api.fie.futurecdn.net/js/w/es6/master-f8e9977d/responsive.js142 KB49 KB (62%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WWBWRXL144 KB47 KB (33%)✓3rd
https://vanilla.futurecdn.net/space/1610431/media/shared/js/main.DcB9tpsv.bundle.js105 KB44 KB (42%)✓3rd
https://sdk.mrf.io/statics/marfeel-sdk.js?id=784265 KB23 KB (36%)✓3rd
https://search-api.fie.futurecdn.net/js/w/es6/master-f8e9977d/hawklinks.js39 KB22 KB (58%)✓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
106 resources · 2.5 MB · 618 KB savings available
FIX
106 resources · 2.5 MB · 618 KB savings available
Warning::
Page weight 1.5 MB over 1MB target
Got: 2.5 MB Expected: ≤ 1 MB
Info::
~618 KB of savings available
Warning::
105 third-party resources (100% of weight)
Info::
1 resources over 200KB
106 resources · 2.5 MiB · 105 third-party 1.5 MiB over 1MB target
JavaScript 65% · 1.6 MiB
Image 18% · 445.9 KiB
Document 10% · 250.9 KiB
Font 3% · 68.9 KiB
CSS 3% · 64.8 KiB
Other 2% · 43.9 KiB

~617.7 KiB of savings available

Remove unused JavaScript: 617.7 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store,private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store,private

DirectiveValueMeaning
no-store—Never cache this response
private—Only browser cache, not CDN/proxy
B
Image Optimization
16 images, 0 KB saveable
REVIEW
16 images, 0 KB saveable
Info::
All images are well-optimized
16 images 442 KB
0 oversized -0 KB
5 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
4 fonts (69 KB)
PASS
4 fonts (69 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

69 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.2 s LCP 1.9 shttps://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-400-Regular.woff2OpenSans-400-Regular.woff2 https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-400-Regular.woff2 — 20.6 KiB — 84 ms — font-display: swaphttps://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-600-SemiBold.woff2OpenSans-600-SemiBold.w... https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-600-SemiBold.woff2 — 20.7 KiB — 81 ms — font-display: swaphttps://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-700-Bold.woff2OpenSans-700-Bold.woff2 https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-700-Bold.woff2 — 20.2 KiB — 25 ms — font-display: swaphttps://vanilla.futurecdn.net/space/1610431/media/fonts/space.woffspace.woff https://vanilla.futurecdn.net/space/1610431/media/fonts/space.woff — 7.5 KiB — 24 ms — font-display: swap
OpenSans-400-Regular.woff2 woff2 swap
Size 21 KB
Load time 84 ms
Start 44 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-600-SemiBold.w... woff2 swap
Size 21 KB
Load time 81 ms
Start 45 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-700-Bold.woff2 woff2 swap
Size 20 KB
Load time 25 ms
Start 219 ms
Risk FOUT — text flashes from fallback to web font
space.woff woff swap
Size 7 KB
Load time 24 ms
Start 219 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 ~2 KB and ~4 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
106 requests over 31149ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s FCP 1.2 s LCP 1.9 shttps://space.com// https://space.com/ — 301 — 260 B — 5 ms — h2https://www.space.com/www.space.com/ https://www.space.com/ — 200 — 247.6 KiB — 35 ms — h2https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-400-Regular.woff2vanilla.futurecdn.net/space/1610431... https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-400-Regular.woff2 — 200 — 20.6 KiB — 84 ms — h3https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-600-SemiBold.woff2vanilla.futurecdn.net/space/1610431... https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-600-SemiBold.woff2 — 200 — 20.7 KiB — 81 ms — h3https://vanilla.futurecdn.net/space/1610431/media/css/space.min.cssvanilla.futurecdn.net/space/1610431... https://vanilla.futurecdn.net/space/1610431/media/css/space.min.css — 200 — 47.5 KiB — 81 ms — h3https://www.space.com/vite/assets/reduxStore-Cn5mFc99.jswww.space.com/vite/assets/reduxStor... https://www.space.com/vite/assets/reduxStore-Cn5mFc99.js — 200 — 4.8 KiB — 12 ms — h2https://www.space.com/vite/assets/main-Cm0XM4Nt.jswww.space.com/vite/assets/main-Cm0X... https://www.space.com/vite/assets/main-Cm0XM4Nt.js — 200 — 3.2 KiB — 16 ms — h2https://www.space.com/vite/assets/Flexi/Widgets/Carouzelize.ts-BQCnpvGa.jswww.space.com/vite/assets/Flexi/Wid... https://www.space.com/vite/assets/Flexi/Widgets/Carouzelize.ts-BQCnpvGa.js — 200 — 1.2 KiB — 16 ms — h2https://www.space.com/vite/assets/Ads/Ads.ts-CCQdtPIk.jswww.space.com/vite/assets/Ads/Ads.t... https://www.space.com/vite/assets/Ads/Ads.ts-CCQdtPIk.js — 200 — 758 B — 16 ms — h2https://www.space.com/vite/assets/Viafoura/EntryScript/EntryScript.ts-ozopKOza.jswww.space.com/vite/assets/Viafoura/... https://www.space.com/vite/assets/Viafoura/EntryScript/EntryScript.ts-ozopKOza.js — 200 — 794 B — 18 ms — h2https://www.space.com/vite/assets/Footer/ccpa-footer-link.ts-B9_pzN11.jswww.space.com/vite/assets/Footer/cc... https://www.space.com/vite/assets/Footer/ccpa-footer-link.ts-B9_pzN11.js — 200 — 1.0 KiB — 19 ms — h2https://www.space.com/vite/assets/Footer/gdpr-footer-link.ts-BYKQRecd.jswww.space.com/vite/assets/Footer/gd... https://www.space.com/vite/assets/Footer/gdpr-footer-link.ts-BYKQRecd.js — 200 — 877 B — 18 ms — h2https://search-api.fie.futurecdn.net/css/browser/master-f8e9977d/responsive.min.csssearch-api.fie.futurecdn.net/css/br... https://search-api.fie.futurecdn.net/css/browser/master-f8e9977d/responsive.min.css — 200 — 10.6 KiB — 39 ms — h2https://www.space.com/media/img/spc-logo-w.svgwww.space.com/media/img/spc-logo-w.... https://www.space.com/media/img/spc-logo-w.svg — 200 — 1.8 KiB — 5 ms — h2https://cdn.mos.cms.futurecdn.net/ziu2wrUcA74BrYYY9rVBvF-650-80.jpg.webpcdn.mos.cms.futurecdn.net/ziu2wrUcA... https://cdn.mos.cms.futurecdn.net/ziu2wrUcA74BrYYY9rVBvF-650-80.jpg.webp — 200 — 42.2 KiB — 93 ms — h3https://search-api.fie.futurecdn.net/js/w/es6/master-f8e9977d/hawklinks.jssearch-api.fie.futurecdn.net/js/w/e... https://search-api.fie.futurecdn.net/js/w/es6/master-f8e9977d/hawklinks.js — 200 — 39.1 KiB — 10 ms — h2https://www.space.com/vite/assets/vendor-DH-HcC7C.jswww.space.com/vite/assets/vendor-DH... https://www.space.com/vite/assets/vendor-DH-HcC7C.js — 200 — 41.3 KiB — 82 ms — h3https://www.space.com/vite/assets/cookies-Btke1V1y.jswww.space.com/vite/assets/cookies-B... https://www.space.com/vite/assets/cookies-Btke1V1y.js — 200 — 1.0 KiB — 69 ms — h3https://www.space.com/vite/assets/screen-size-Dw4LJ_p1.jswww.space.com/vite/assets/screen-si... https://www.space.com/vite/assets/screen-size-Dw4LJ_p1.js — 200 — 910 B — 69 ms — h3https://www.space.com/vite/assets/Nav/Nav.ts-agSe9QHG.jswww.space.com/vite/assets/Nav/Nav.t... https://www.space.com/vite/assets/Nav/Nav.ts-agSe9QHG.js — 200 — 2.6 KiB — 70 ms — h3https://www.space.com/vite/assets/lazy-iframe-DxRpt_oy.jswww.space.com/vite/assets/lazy-ifra... https://www.space.com/vite/assets/lazy-iframe-DxRpt_oy.js — 200 — 1.0 KiB — 70 ms — h3https://www.space.com/vite/assets/MyAccount/Badges/index.ts-Bvthoehy.jswww.space.com/vite/assets/MyAccount... https://www.space.com/vite/assets/MyAccount/Badges/index.ts-Bvthoehy.js — 200 — 955 B — 69 ms — h3https://www.space.com/vite/assets/observeStore-BFjnUjC2.jswww.space.com/vite/assets/observeSt... https://www.space.com/vite/assets/observeStore-BFjnUjC2.js — 200 — 918 B — 69 ms — h3https://www.space.com/vite/assets/index-Dx6nOJhq.jswww.space.com/vite/assets/index-Dx6... https://www.space.com/vite/assets/index-Dx6nOJhq.js — 200 — 1.4 KiB — 69 ms — h3https://www.space.com/vite/assets/debouncer-DovBpx4g.jswww.space.com/vite/assets/debouncer... https://www.space.com/vite/assets/debouncer-DovBpx4g.js — 200 — 891 B — 67 ms — h3https://www.space.com/vite/assets/MyAccount/Badges/constants.ts-DWYI6TUO.jswww.space.com/vite/assets/MyAccount... https://www.space.com/vite/assets/MyAccount/Badges/constants.ts-DWYI6TUO.js — 200 — 1.7 KiB — 67 ms — h3https://www.space.com/vite/assets/MyAccount/Badges/utils.ts-ZtUZH30n.jswww.space.com/vite/assets/MyAccount... https://www.space.com/vite/assets/MyAccount/Badges/utils.ts-ZtUZH30n.js — 200 — 3.1 KiB — 66 ms — h3https://www.space.com/vite/assets/Ads/Bordeaux/Controllers/BordeauxController.ts-BGgoKI6y.jswww.space.com/vite/assets/Ads/Borde... https://www.space.com/vite/assets/Ads/Bordeaux/Controllers/BordeauxController.ts-BGgoKI6y.js — 200 — 1.7 KiB — 63 ms — h3https://www.space.com/vite/assets/Ads/Bordeaux/Services/Kiosq.ts-AAMjXMsn.jswww.space.com/vite/assets/Ads/Borde... https://www.space.com/vite/assets/Ads/Bordeaux/Services/Kiosq.ts-AAMjXMsn.js — 200 — 1.6 KiB — 63 ms — h3https://www.space.com/vite/assets/Viafoura/Core/Bootstrap.ts-DvK5nHUP.jswww.space.com/vite/assets/Viafoura/... https://www.space.com/vite/assets/Viafoura/Core/Bootstrap.ts-DvK5nHUP.js — 200 — 1.6 KiB — 63 ms — h3
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s FCP 1.2 s LCP 1.9 shttps://space.com// https://space.com/ — 301 — 260 B — 5 ms — h2https://www.space.com/www.space.com/ https://www.space.com/ — 200 — 247.6 KiB — 35 ms — h2https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-400-Regular.woff2vanilla.futurecdn.net/space/1610431... https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-400-Regular.woff2 — 200 — 20.6 KiB — 84 ms — h3https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-600-SemiBold.woff2vanilla.futurecdn.net/space/1610431... https://vanilla.futurecdn.net/space/1610431/media/shared/fonts/OpenSans-600-SemiBold.woff2 — 200 — 20.7 KiB — 81 ms — h3https://vanilla.futurecdn.net/space/1610431/media/css/space.min.cssvanilla.futurecdn.net/space/1610431... https://vanilla.futurecdn.net/space/1610431/media/css/space.min.css — 200 — 47.5 KiB — 81 ms — 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https://region1.google-analytics.com/g/collect?v=2&tid=G-NHWGPTEENX&gtm=45je64h1v868802068z8896039803za20gzb896039803zd896039803&_p=1776801348488&gcs=G101&gcd=13q3t3q2q5l1&npa=1&dma_cps=-&dma=1&tcfd=1065r&_eu=AAAAAGQ&are=1&cid=1302609985.1776801350&frm=0&pscdl=denied&rcb=4&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&tag_exp=0~115938465~115938468~117266401~117884344&sid=1776801349&sct=1&seg=0&dl=https%3A%2F%2Fwww.space.com%2F&dt=Space.com%3A%20NASA%2C%20Space%20Exploration%20and%20Astronomy%20News&_tu=SA&_s=2&tfd=6912 — 204 — 48 B — 25 ms — h2https://events.newsroom.bi/recirculation/recirculation.phpevents.newsroom.bi/recirculation/re... https://events.newsroom.bi/recirculation/recirculation.php — 200 — 432 B — 54 ms — h2https://events.newsroom.bi/recirculation/recirculation.phpevents.newsroom.bi/recirculation/re... https://events.newsroom.bi/recirculation/recirculation.php — 200 — 432 B — 52 ms — h2https://events.newsroom.bi/ingest.phpevents.newsroom.bi/ingest.php https://events.newsroom.bi/ingest.php — 200 — 421 B — 28 ms — h2https://events.newsroom.bi/ingest.phpevents.newsroom.bi/ingest.php https://events.newsroom.bi/ingest.php — 200 — 421 B — 28 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 3497ms · 938KB · €38/mo
www.space.com
Other
Costly
Execution 2596ms
Transfer 248 KB
Monthly Cost €28/mo
Unattributable
Other
Costly
Execution 384ms
Transfer 0 KB
Monthly Cost €4/mo
cdn.privacy-mgmt.com
Other
Optional
Execution 112ms
Transfer 35 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 99ms
Transfer 166 KB
Unused 50%
Monthly Cost €1/mo
www.space.com
Other
Optional
Execution 96ms
Transfer 41 KB
Unused 53%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 91ms
Transfer 144 KB
Unused 33%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 61ms
Transfer 145 KB
Unused 41%
Monthly Cost €1/mo
bordeaux.futurecdn.net
Other
Optional
Execution 58ms
Transfer 159 KB
Unused 57%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.space.com adds 2596ms and costs ~€28/month
  • Unattributable adds 384ms 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

www.space.com takes 2596ms 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 384ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

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

Source: web.dev

50% of Google Tag Manager'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

53% of www.space.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

57% of bordeaux.futurecdn.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

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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