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https://astronomy.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
37
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
94
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.
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.

3.09 s

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

14.97 s

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

1.09 s

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

0.026

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

15.98 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.

53.44 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
8 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
14.1 MB transferred, 152 requests
FIX
14.1 MB transferred, 152 requests
Critical::
Page weighs 18.7 MB (14.1 MB transferred)
Warning::
Images are 11.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 11.9 MB
Warning::
JavaScript is 1.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.8 MB
Warning::
152 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 3.0 g CO2 per page load
14.1 MB / 2.4 MB budget
14.1 MB transferred
152 requests
3.0 g CO2 per page load
Images 11.9 MiB 84%
JavaScript 1.8 MiB 12%
Other 134.0 KiB 1%
Fonts 123.4 KiB 1%
CSS 103.4 KiB 1%
HTML 78.0 KiB 1%
Other 16.9 KiB 0%
Other 3.3 KiB 0%
Other 1.0 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

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 (14.1 MiB of 14.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
6436ms total JS execution
FIX
6436ms total JS execution
Warning::
https://www.astronomy.com/: 1298ms CPU time
Warning::
Unattributable: 1010ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 826ms CPU time
Warning::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 456ms CPU time
Warning::
https://s.dpmsrv.com/dpm_1784f0e37c1fdd6200c1e8b28...: 331ms CPU time
Warning::
Third-party scripts: 6436ms (100% of total)

Main Thread Breakdown

Script Evaluation 57% Other 16% Style & Layout 14% Script Parsing & Compilation 6% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.astronomy.com/1298ms132ms18ms3rd
Unattributable1010ms30ms0ms3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js826ms695ms79ms3rd
https://fundingchoicesmessages.google.com/f/AGSKWxWBrsUvPaeJKYDYj87YqkmJqw6QeseMOLQIlLAEx3dHba--Mqp6yYwPngoat7vUPeW9BDAzBY5k_ZmqJKIdzLkVpVjiM_qJ9Iu7ptvlvj2pgPaDvT0kP7M_6iLEZ_WVvi2ZoPM8fw==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODk3NjA0LDcyNzAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cuYXN0cm9ub215LmNvbS8iLG51bGwsW1s4LCJwU0prbzE5NklIMCJdLFs5LCJlbi1VUyJdLFszNSwiMTc3Njg5NzYwNCJdLFsyNiwiOCJdLFsxOSwiMSJdLFsyNCwiIl0sWzI1LCJbWzk1Mzg2MTg5XV0iXSxbMjksImZhbHNlIl1dXQ456ms225ms60ms3rd
https://s.dpmsrv.com/dpm_1784f0e37c1fdd6200c1e8b28e8caae5402e74e0.min.js331ms195ms5ms3rd
https://www.astronomy.com/cdn-cgi/challenge-platform/scripts/jsd/main.js306ms282ms3ms3rd
https://cdn-cookieyes.com/client_data/8b2b503ea77987f25f16a19b/banner.js295ms191ms2ms3rd
https://ads.blogherads.com/static/chunks/5273.eec6f62e6c9beefc4be4.js284ms256ms22ms3rd
https://fundingchoicesmessages.google.com/i/pub-9489621755605348?ers=1280ms252ms24ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js204ms186ms7ms3rd

Showing top 10 of 19 scripts

F
JS Bundles
Action
57 scripts, 943 KB unused
FIX
57 scripts, 943 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ads.blogherads.com/static/chunks/5273.eec6...: 103 KB unused (78%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WHW...: 69 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 943 KB
943 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://ads.blogherads.com/static/chunks/5273.eec6f62e6c9beefc4be4.js132 KB103 KB (78%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHWV7HZ144 KB69 KB (48%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-2R82D8QZG9&cx=c&gtm=4e64k1155 KB63 KB (41%)✓3rd
https://olytics.omeda.com/olytics/js/v3/p/olytics.min.js71 KB46 KB (66%)✓3rd
https://ads.blogherads.com/static/chunks/3622.7d0e84ccad5146cd86e6.js50 KB41 KB (82%)✓3rd
https://ads.blogherads.com/static/chunks/831.b113b40433677910de75.js43 KB35 KB (81%)✓3rd
https://fundingchoicesmessages.google.com/i/pub-9489621755605348?ers=170 KB33 KB (48%)✓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
152 resources · 14.1 MB · 943 KB savings available
FIX
152 resources · 14.1 MB · 943 KB savings available
Warning::
Page weight 13.1 MB over 1MB target
Got: 14.1 MB Expected: ≤ 1 MB
Info::
~943 KB of savings available
Warning::
151 third-party resources (100% of weight)
Info::
6 resources over 200KB
152 resources · 14.1 MiB · 151 third-party 13.1 MiB over 1MB target
Image 84% · 11.9 MiB
JavaScript 12% · 1.8 MiB
Font 2% · 252.8 KiB
CSS 1% · 103.4 KiB
Document 1% · 80.0 KiB
Other 0% · 21.5 KiB

~942.5 KiB of savings available

Remove unused JavaScript: 942.5 KiB
B
Image Optimization
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Warning::
https://www.astronomy.com/wp-content/uploads/2023/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
27 images 11.9 MB
0 oversized -0 KB
18 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

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

Source: web.dev / Core Web Vitals

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
14 fonts (253 KB)
PASS
14 fonts (253 KB)
Info::
14 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

14

253 KB total

Render-blocking

0

of 14

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 14.0 s FCP 3.1 s LCP 15.0 shttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-light.65dbd68a.woff2rubik-light.65dbd68a.woff2 https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-light.65dbd68a.woff2 — 25.5 KiB — 38 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-regular.18856bd2.woff2rubik-regular.18856bd2.... https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-regular.18856bd2.woff2 — 25.9 KiB — 30 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-semibold.c5dee968.woff2rubik-semibold.c5dee968... https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-semibold.c5dee968.woff2 — 26.9 KiB — 38 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-medium.ffa06caa.woff2rubik-medium.ffa06caa.w... https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-medium.ffa06caa.woff2 — 25.4 KiB — 40 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-bold.2a7d0e11.woff2rubik-bold.2a7d0e11.woff2 https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-bold.2a7d0e11.woff2 — 25.6 KiB — 42 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-bold.2a7d0e11.woff2rubik-bold.2a7d0e11.woff2 https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-bold.2a7d0e11.woff2 — 0 B — 33 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-medium.ffa06caa.woff2rubik-medium.ffa06caa.w... https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-medium.ffa06caa.woff2 — 0 B — 30 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-semibold.c5dee968.woff2rubik-semibold.c5dee968... https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-semibold.c5dee968.woff2 — 0 B — 30 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-regular.18856bd2.woff2rubik-regular.18856bd2.... https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-regular.18856bd2.woff2 — 0 B — 29 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-light.65dbd68a.woff2rubik-light.65dbd68a.woff2 https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-light.65dbd68a.woff2 — 0 B — 30 ms — font-display: swaphttps://fonts.gstatic.com/s/firasans/v18/va9E4kDNxMZdWfMOD5Vvl4jLazX3dA.woff2va9E4kDNxMZdWfMOD5Vvl4j... https://fonts.gstatic.com/s/firasans/v18/va9E4kDNxMZdWfMOD5Vvl4jLazX3dA.woff2 — 17.1 KiB — 36 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 77 ms — font-display: swaphttps://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-lightitalic.003cbe43.woff2rubik-lightitalic.003cb... https://www.astronomy.com/wp-content/themes/astronomy/dist/fonts/rubik-lightitalic.003cbe43.woff2 — 30.3 KiB — 13 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 — 47 ms — font-display: swap
rubik-light.65dbd68a.woff2 woff2 swap
Size 26 KB
Load time 38 ms
Start 565 ms
Risk FOUT — text flashes from fallback to web font
rubik-regular.18856bd2.... woff2 swap
Size 26 KB
Load time 30 ms
Start 565 ms
Risk FOUT — text flashes from fallback to web font
rubik-semibold.c5dee968... woff2 swap
Size 27 KB
Load time 38 ms
Start 565 ms
Risk FOUT — text flashes from fallback to web font
rubik-medium.ffa06caa.w... woff2 swap
Size 25 KB
Load time 40 ms
Start 565 ms
Risk FOUT — text flashes from fallback to web font
rubik-bold.2a7d0e11.woff2 woff2 swap
Size 26 KB
Load time 42 ms
Start 565 ms
Risk FOUT — text flashes from fallback to web font
rubik-bold.2a7d0e11.woff2 woff2 swap
Size 0 KB
Load time 33 ms
Start 577 ms
Risk FOUT — text flashes from fallback to web font
rubik-medium.ffa06caa.w... woff2 swap
Size 0 KB
Load time 30 ms
Start 577 ms
Risk FOUT — text flashes from fallback to web font
rubik-semibold.c5dee968... woff2 swap
Size 0 KB
Load time 30 ms
Start 577 ms
Risk FOUT — text flashes from fallback to web font
rubik-regular.18856bd2.... woff2 swap
Size 0 KB
Load time 29 ms
Start 577 ms
Risk FOUT — text flashes from fallback to web font
rubik-light.65dbd68a.woff2 woff2 swap
Size 0 KB
Load time 30 ms
Start 577 ms
Risk FOUT — text flashes from fallback to web font
va9E4kDNxMZdWfMOD5Vvl4j... woff2 swap
Size 17 KB
Load time 36 ms
Start 677 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 77 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
rubik-lightitalic.003cb... woff2 swap
Size 30 KB
Load time 13 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 47 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)
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
23 hints, 0 missing preconnects
PASS
23 hints, 0 missing preconnects
Info::
Page uses 23 resource hint(s)

Current Resource Hints

preconnect
3
preload
1
dns-prefetch
+4
14
prefetch
5

23 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
HTTP Caching
max-age=600 (10 minutes)
PASS
max-age=600 (10 minutes)
Info::
Cache-Control header is set
Got: max-age=600, must-revalidate
Info::
Effective TTL: 10 minutes (max-age=600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=600, must-revalidate

DirectiveValueMeaning
max-age600Cache for 10 minutes
must-revalidate—Must recheck with server after expiry
Effective TTL: 600 seconds
Network Waterfall
152 requests over 3546ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 3.1 s LCP 15.0 shttps://astronomy.com// https://astronomy.com/ — 301 — 721 B — 191 ms — h2https://www.astronomy.com/www.astronomy.com/ https://www.astronomy.com/ — 200 — 45.9 KiB — 231 ms — h2https://olytics.omeda.com/olytics/css/v3/p/olytics.cssolytics.omeda.com/olytics/css/v3/p/... https://olytics.omeda.com/olytics/css/v3/p/olytics.css — 200 — 3.3 KiB — 83 ms — h2https://www.astronomy.com/wp-content/uploads/2023/01/cropped-Logo-white@2x.pngwww.astronomy.com/wp-content/upload... https://www.astronomy.com/wp-content/uploads/2023/01/cropped-Logo-white@2x.png — 200 — 2.3 KiB — 19 ms — h2https://www.astronomy.com/wp-content/plugins/astronomy-core/dist/blocks/pic-of-the-day/styles.css?ver=76de2ad23e6705f17dcdbe997ba98039www.astronomy.com/wp-content/plugin... https://www.astronomy.com/wp-content/plugins/astronomy-core/dist/blocks/pic-of-the-day/styles.css?ver=76de2ad23e6705f17dcdbe997ba98039 — 200 — 314 B — 19 ms — h2https://www.astronomy.com/wp-content/plugins/astronomy-core/dist/blocks/post-content-selector/styles.css?ver=cc14531cd3d27fb7a0d5c45a67189f41www.astronomy.com/wp-content/plugin... https://www.astronomy.com/wp-content/plugins/astronomy-core/dist/blocks/post-content-selector/styles.css?ver=cc14531cd3d27fb7a0d5c45a67189f41 — 200 — 1.3 KiB — 20 ms — h2https://www.astronomy.com/wp-content/plugins/astronomy-core/dist/lib/css/glide.core.min.css?ver=1.0.0www.astronomy.com/wp-content/plugin... https://www.astronomy.com/wp-content/plugins/astronomy-core/dist/lib/css/glide.core.min.css?ver=1.0.0 — 200 — 379 B — 25 ms — h2https://www.astronomy.com/wp-content/plugins/fc-top-banner/style.css?ver=1.1.5www.astronomy.com/wp-content/plugin... https://www.astronomy.com/wp-content/plugins/fc-top-banner/style.css?ver=1.1.5 — 200 — 857 B — 22 ms — h2https://www.astronomy.com/wp-content/plugins/sheknows-infuse/public/css/style.css?ver=1.0.43www.astronomy.com/wp-content/plugin... 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https://insight.adsrvr.org/track/pxl/?adv=f6ba480&ct=0:0qwxs84&fmt=3 — 200 — 148 B — 130 ms — h2https://insight.adsrvr.org/track/pxl/?adv=f6ba480&ct=0:s161583&fmt=3insight.adsrvr.org/track/pxl/?adv=f... https://insight.adsrvr.org/track/pxl/?adv=f6ba480&ct=0:s161583&fmt=3 — 200 — 149 B — 127 ms — h2https://k.clarity.ms/collectk.clarity.ms/collect https://k.clarity.ms/collect — 204 — 281 B — 409 ms — http/1.1https://ib.adnxs.com/bounce?%2Fseg%3Fmember%3D827%26consent%3D1%26add%3D39584851%2C39580835ib.adnxs.com/bounce?%2Fseg%3Fmember... https://ib.adnxs.com/bounce?%2Fseg%3Fmember%3D827%26consent%3D1%26add%3D39584851%2C39580835 — 200 — 925 B — 35 ms — h2https://pixel.mathtag.com/event/img?primary-x-request-id=948bee92214b35162775cd50ac45e926&mt_id=2373830&mt_adid=431650pixel.mathtag.com/event/img?primary... https://pixel.mathtag.com/event/img?primary-x-request-id=948bee92214b35162775cd50ac45e926&mt_id=2373830&mt_adid=431650 — 200 — 756 B — 108 ms — http/1.1https://pixel.mathtag.com/event/img?primary-x-request-id=83429ec4f03874d605047563f332cd49&mt_id=2373835&mt_adid=431650pixel.mathtag.com/event/img?primary... https://pixel.mathtag.com/event/img?primary-x-request-id=83429ec4f03874d605047563f332cd49&mt_id=2373835&mt_adid=431650 — 200 — 756 B — 105 ms — http/1.1
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 6436ms · 841KB · €70/mo
www.astronomy.com
Other
Costly
Execution 1298ms
Transfer 46 KB
Monthly Cost €14/mo
Unattributable
Other
Costly
Execution 1010ms
Transfer 0 KB
Monthly Cost €11/mo
www.gstatic.com
Other
Costly
Execution 826ms
Transfer 0 KB
Unused 49%
Monthly Cost €9/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 456ms
Transfer 71 KB
Monthly Cost €5/mo
s.dpmsrv.com
Other
Costly
Execution 331ms
Transfer 14 KB
Monthly Cost €4/mo
www.astronomy.com
Other
Costly
Execution 306ms
Transfer 0 KB
Monthly Cost €3/mo
cdn-cookieyes.com
Other
Costly
Execution 295ms
Transfer 9 KB
Monthly Cost €3/mo
ads.blogherads.com
Other
Costly
Execution 284ms
Transfer 132 KB
Unused 78%
Monthly Cost €3/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 280ms
Transfer 70 KB
Unused 48%
Monthly Cost €3/mo
Microsoft Clarity
Session Replay
Costly
Execution 204ms
Transfer 26 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 204ms
Transfer 144 KB
Unused 48%
Monthly Cost €2/mo
olytics.omeda.com
Other
Optional
Execution 191ms
Transfer 71 KB
Unused 66%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 183ms
Transfer 155 KB
Unused 41%
Monthly Cost €2/mo
www.astronomy.com
Other
Optional
Execution 124ms
Transfer 31 KB
Unused 66%
Monthly Cost €1/mo
Google Analytics
Analytics
Optional
Execution 116ms
Transfer 21 KB
Monthly Cost €1/mo
dkpklk99llpj0.cloudfront.net
Other
Optional
Execution 104ms
Transfer 22 KB
Monthly Cost €1/mo
static.chartbeat.com
Other
Optional
Execution 90ms
Transfer 16 KB
Monthly Cost €1/mo
www.astronomy.com
Other
Optional
Execution 81ms
Transfer 3 KB
Monthly Cost €1/mo
static.chartbeat.com
Other
Optional
Execution 51ms
Transfer 10 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.astronomy.com adds 1298ms and costs ~€14/month
  • Unattributable adds 1010ms and costs ~€11/month
  • www.gstatic.com adds 826ms and costs ~€9/month
  • fundingchoicesmessages.google.com adds 456ms and costs ~€5/month
  • s.dpmsrv.com adds 331ms and costs ~€4/month
  • www.astronomy.com adds 306ms and costs ~€3/month
  • cdn-cookieyes.com adds 295ms and costs ~€3/month
  • ads.blogherads.com adds 284ms and costs ~€3/month
  • fundingchoicesmessages.google.com adds 280ms and costs ~€3/month
  • Microsoft Clarity adds 204ms and costs ~€2/month
  • Google Tag Manager adds 204ms and costs ~€2/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.astronomy.com takes 1298ms 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 1010ms 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.gstatic.com takes 826ms 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 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

s.dpmsrv.com takes 331ms 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.astronomy.com takes 306ms 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

cdn-cookieyes.com takes 295ms 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

ads.blogherads.com takes 284ms 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

78% of ads.blogherads.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

fundingchoicesmessages.google.com takes 280ms 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

Microsoft Clarity takes 204ms 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 204ms 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

66% of olytics.omeda.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

66% of www.astronomy.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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