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https://rp-online.de

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
4
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
36
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
86
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.
63
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.

10.38 s

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

16.51 s

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

270 ms

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

0.281

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

10.38 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.

16.61 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
9 PASS 2 REVIEW 4 FIX
D
Page Weight Budget
Action
2.5 MB transferred, 55 requests
FIX
2.5 MB transferred, 55 requests
Warning::
Page weighs 5.9 MB (2.5 MB transferred)
Warning::
JavaScript is 1.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.0 MB
Info::
Fonts are 704 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 704 KB
Info::
55 HTTP requests
Info::
Estimated 0.53 g CO2 per page load
2.5 MB / 2.4 MB budget
2.5 MB transferred
55 requests
0.53 g CO2 per page load
JavaScript 1.0 MiB 41%
Fonts 704.1 KiB 27%
Images 636.1 KiB 25%
HTML 106.8 KiB 4%
CSS 65.7 KiB 3%
Other 2.9 KiB 0%
Other 1.9 KiB 0%
Other 1.3 KiB 0%
Other 913 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

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

D
JS Execution Cost
Action
2157ms total JS execution
FIX
2157ms total JS execution
Warning::
Unattributable: 546ms CPU time
Warning::
https://rp-online.de/info/consent/: 358ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Z4XD...: 324ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-KJQ...: 214ms CPU time
Info::
https://rp-online.de/assets/head.js?v=1774856308: 153ms CPU time
Warning::
Third-party scripts: 1315ms (61% of total)

Main Thread Breakdown

Script Evaluation 40% Other 25% Script Parsing & Compilation 15% Style & Layout 15%
ScriptTotalScriptingParse/CompileParty
Unattributable546ms9ms0ms3rd
https://rp-online.de/info/consent/358ms9ms3ms1st
https://www.googletagmanager.com/gtag/js?id=G-Z4XDX2NETC&cx=c&gtm=4e64k0h1324ms259ms62ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KJQSZW7Q214ms159ms52ms3rd
https://rp-online.de/assets/head.js?v=1774856308153ms113ms39ms1st
https://rp-online.de/assets/consent/consent-page.js?v=1774856308126ms100ms26ms1st
https://tagrpd.de/v2/prod/rpd/rp-online/headlibrary.js?v=202212160700109ms34ms17ms3rd
https://rp-online.de/assets/piano.js?v=177485630896ms79ms17ms1st
https://accounts.google.com/gsi/client66ms28ms37ms3rd
https://rp-online.de/app/assets/dist/app.js?v=2026041416123257ms36ms10ms1st

Showing top 10 of 12 scripts

D
JS Bundles
Action
23 scripts, 372 KB unused
FIX
23 scripts, 372 KB unused
Warning::
https://accounts.google.com/gsi/client: 81 KB unused (85%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://rp-online.de/assets/head.js?v=1774856308: 69 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KJQ...: 65 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Z4XD...: 63 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://news.google.com/swg/js/v1/swg.js: 47 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 372 KB
372 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://accounts.google.com/gsi/client96 KB81 KB (85%)✓3rd
https://rp-online.de/assets/head.js?v=177485630898 KB69 KB (70%)✓1st
https://www.googletagmanager.com/gtm.js?id=GTM-KJQSZW7Q126 KB65 KB (52%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-Z4XDX2NETC&cx=c&gtm=4e64k0h1150 KB63 KB (42%)✓3rd
https://news.google.com/swg/js/v1/swg.js71 KB47 KB (69%)✓3rd
https://rp-online.de/assets/consent/consent-page.js?v=177485630846 KB24 KB (52%)✓1st
https://rp-online.de/assets/piano.js?v=177485630839 KB22 KB (58%)✓1st
https://data-043610b415.rp-online.de/iomm/latest/bootstrap/stub.js1 KB—✓3rd
https://news.google.com/swg/js/v1/swg-gaa.js27 KB—✓3rd
https://rp-online.de/assets/foot.js?v=1774856308180 KB—✓1st

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

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
Info::
Last-Modified header present
Cache-Control

no-store

DirectiveValueMeaning
no-store—Never cache this response
B
Image Optimization
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Info::
All images are well-optimized
14 images 636 KB
0 oversized -0 KB
12 legacy format
0 missing dimensions CLS risk
C
Page Weight Inventory
Action
55 resources · 2.5 MB · 372 KB savings available
REVIEW
55 resources · 2.5 MB · 372 KB savings available
Warning::
Page weight 1.5 MB over 1MB target
Got: 2.5 MB Expected: ≤ 1 MB
Info::
~372 KB of savings available
Info::
21 third-party resources (20% of weight)
Info::
2 resources over 200KB
55 resources · 2.5 MiB · 21 third-party 1.5 MiB over 1MB target
JavaScript 41% · 1.0 MiB
Font 27% · 704.1 KiB
Image 25% · 638.0 KiB
Document 4% · 106.8 KiB
CSS 3% · 65.7 KiB
Other 0% · 2.2 KiB

~371.5 KiB of savings available

Remove unused JavaScript: 371.5 KiB
A
Third-Party Impact
20% third-party, 0 ms blocking
PASS
20% third-party, 0 ms blocking
Info::
Third-party code accounts for 20% of page weight (525.2 KiB of 2.5 MiB)
Info::
Third-party blocking time is low (0 ms)
80%
20%
First-party Third-party
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
3 fonts (704 KB)
PASS
3 fonts (704 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

704 KB total

Render-blocking

0

of 3

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 16.0 s FCP 10.4 s LCP 16.5 shttps://rp-online.de/assets/skins/rp-online/fonts/inter/subset/woff2/inter-variable-webfont.woff2?v=2.2.1inter-variable-webfont.... https://rp-online.de/assets/skins/rp-online/fonts/inter/subset/woff2/inter-variable-webfont.woff2?v=2.2.1 — 337.8 KiB — 54 ms — font-display: swaphttps://rp-online.de/assets/skins/rp-online/fonts/inter/subset/woff2/inter-variable-webfont.woff2?v=2.1.0inter-variable-webfont.... https://rp-online.de/assets/skins/rp-online/fonts/inter/subset/woff2/inter-variable-webfont.woff2?v=2.1.0 — 337.8 KiB — 56 ms — font-display: swaphttps://rp-online.de/assets/skins/rp-online/fonts/publico/woff2/publicoheadline-medium-webfont.woff2?v=1.0.0publicoheadline-medium-... https://rp-online.de/assets/skins/rp-online/fonts/publico/woff2/publicoheadline-medium-webfont.woff2?v=1.0.0 — 28.5 KiB — 59 ms — font-display: swap
inter-variable-webfont.... woff2 swap
Size 338 KB
Load time 54 ms
Start 307 ms
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
inter-variable-webfont.... woff2 swap
Size 338 KB
Load time 56 ms
Start 720 ms
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
publicoheadline-medium-... woff2 swap
Size 29 KB
Load time 59 ms
Start 720 ms
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 ~338 KB and ~676 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
9 hints, 0 missing preconnects
PASS
9 hints, 0 missing preconnects
Info::
Page uses 9 resource hint(s)

Current Resource Hints

preconnect
—
preload
9
dns-prefetch
—
prefetch
—

9 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
55 requests over 984ms
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 FCP 10.4 s LCP 16.5 shttps://rp-online.de// https://rp-online.de/ — 200 — 102.2 KiB — 57 ms — h3https://accounts.google.com/gsi/clientaccounts.google.com/gsi/client https://accounts.google.com/gsi/client — 200 — 96.0 KiB — 83 ms — h2https://news.google.com/swg/js/v1/swg.jsnews.google.com/swg/js/v1/swg.js https://news.google.com/swg/js/v1/swg.js — 200 — 71.3 KiB — 28 ms — h2https://rp-online.de/assets/skins/rp-online/styles.css?v=1774856308/assets/skins/rp-online/styles.css?... https://rp-online.de/assets/skins/rp-online/styles.css?v=1774856308 — 200 — 25.7 KiB — 67 ms — h3https://rp-online.de/assets/head.js?v=1774856308/assets/head.js?v=1774856308 https://rp-online.de/assets/head.js?v=1774856308 — 200 — 98.4 KiB — 81 ms — h3https://tagrpd.de/v2/prod/rpd/rp-online/headlibrary.js?v=202212160700tagrpd.de/v2/prod/rpd/rp-online/hea... https://tagrpd.de/v2/prod/rpd/rp-online/headlibrary.js?v=202212160700 — 200 — 25.0 KiB — 43 ms — h3https://d.smartico.one/get/wg/SaXiJbSUv9Dltge4cF6LzHZKBHr4ovkHIYlLo5uD?scriptid=trm-ad-banderol-SaXiJbSUv9Dltge4cF6LzHZKBHr4ovkHIYlLo5uDd.smartico.one/get/wg/SaXiJbSUv9Dlt... https://d.smartico.one/get/wg/SaXiJbSUv9Dltge4cF6LzHZKBHr4ovkHIYlLo5uD?scriptid=trm-ad-banderol-SaXiJbSUv9Dltge4cF6LzHZKBHr4ovkHIYlLo5uD — -1 — 0 B — 556 ms — https://rp-online.de/assets/consent/consent-page.js?v=1774856308/assets/consent/consent-page.js?v=1... https://rp-online.de/assets/consent/consent-page.js?v=1774856308 — 200 — 46.1 KiB — 77 ms — h3https://trmwidget.eu/get/widget/magazine.rp-online.de/js/8e684111b2fc8d46098a7f6ecaef2f5atrmwidget.eu/get/widget/magazine.rp... https://trmwidget.eu/get/widget/magazine.rp-online.de/js/8e684111b2fc8d46098a7f6ecaef2f5a — -1 — 0 B — 556 ms — https://static-weekli.net/www/img/logo_240x97.pngstatic-weekli.net/www/img/logo_240x... https://static-weekli.net/www/img/logo_240x97.png — -1 — 0 B — 556 ms — https://rp-online.de/assets/foot.js?v=1774856308/assets/foot.js?v=1774856308 https://rp-online.de/assets/foot.js?v=1774856308 — 200 — 180.1 KiB — 94 ms — h3https://static-nt.weekli.systems/static/widget/widget-loader-1.6.4.min.jsstatic-nt.weekli.systems/static/wid... https://static-nt.weekli.systems/static/widget/widget-loader-1.6.4.min.js — -1 — 0 B — 556 ms — https://rp-online.de/assets/piano.js?v=1774856308/assets/piano.js?v=1774856308 https://rp-online.de/assets/piano.js?v=1774856308 — 200 — 38.8 KiB — 91 ms — h3https://data-043610b415.rp-online.de/iomm/latest/bootstrap/stub.jsdata-043610b415.rp-online.de/iomm/l... https://data-043610b415.rp-online.de/iomm/latest/bootstrap/stub.js — 200 — 666 B — 337 ms — h2https://data-497ecca600.rp-online.de/iomm/latest/bootstrap/stub.jsdata-497ecca600.rp-online.de/iomm/l... https://data-497ecca600.rp-online.de/iomm/latest/bootstrap/stub.js — 200 — 685 B — 418 ms — h2https://rp-online.de/assets/cmp.js?v=1774856308/assets/cmp.js?v=1774856308 https://rp-online.de/assets/cmp.js?v=1774856308 — 200 — 21.2 KiB — 74 ms — h3https://rp-online.de/imgs/32/2/6/4/5/7/9/9/5/7/tok_7722da67074f89b04d048d4772121290/w760_h475_x1024_y682_DPA_dpa_urn_newsml_dpa.com_20090101_260422-911-006952-v2-s2048-a3fa2fdcab4e7625.jpeg/imgs/32/2/6/4/5/7/9/9/5/7/tok_7722... https://rp-online.de/imgs/32/2/6/4/5/7/9/9/5/7/tok_7722da67074f89b04d048d4772121290/w760_h475_x1024_y682_DPA_dpa_urn_newsml_dpa.com_20090101_260422-911-006952-v2-s2048-a3fa2fdcab4e7625.jpeg — 200 — 43.2 KiB — 100 ms — h3https://rp-online.de/imgs/32/2/6/4/5/8/2/9/9/3/tok_287e53cfdf748e6adb49d66d39ad9f33/w760_h475_x1024_y682_DPA_dpa_ezy23y5wje-v6-ax-s2048-faf34f7c366084d0.jpeg/imgs/32/2/6/4/5/8/2/9/9/3/tok_287e... https://rp-online.de/imgs/32/2/6/4/5/8/2/9/9/3/tok_287e53cfdf748e6adb49d66d39ad9f33/w760_h475_x1024_y682_DPA_dpa_ezy23y5wje-v6-ax-s2048-faf34f7c366084d0.jpeg — 200 — 45.8 KiB — 101 ms — h3https://rp-online.de/imgs/32/2/6/4/6/9/4/0/8/9/tok_5963bb564b78755fa815d8830a50b51d/w760_h475_x1024_y690_DPA_dpa_mgmiyfu67d-v8-ax-s2048-f2060a6a5273c280.jpeg/imgs/32/2/6/4/6/9/4/0/8/9/tok_5963... https://rp-online.de/imgs/32/2/6/4/6/9/4/0/8/9/tok_5963bb564b78755fa815d8830a50b51d/w760_h475_x1024_y690_DPA_dpa_mgmiyfu67d-v8-ax-s2048-f2060a6a5273c280.jpeg — 200 — 39.7 KiB — 103 ms — h3https://rp-online.de/imgs/32/2/6/4/5/2/5/6/9/5/tok_05b946f524e0dfef32ff52ec10a7ef78/w760_h475_x1500_y844_DPA_bfunk_dpa_5FB0620068898E26-c8b315a6a0373b72.jpg/imgs/32/2/6/4/5/2/5/6/9/5/tok_05b9... https://rp-online.de/imgs/32/2/6/4/5/2/5/6/9/5/tok_05b946f524e0dfef32ff52ec10a7ef78/w760_h475_x1500_y844_DPA_bfunk_dpa_5FB0620068898E26-c8b315a6a0373b72.jpg — 200 — 28.6 KiB — 100 ms — h3https://rp-online.de/imgs/32/2/6/4/5/1/0/5/4/1/tok_b3917caa4b4a061e03973b82388f15b3/w760_h475_x703_y843_DJI_0144-ce02edbefeada98c.jpg/imgs/32/2/6/4/5/1/0/5/4/1/tok_b391... https://rp-online.de/imgs/32/2/6/4/5/1/0/5/4/1/tok_b3917caa4b4a061e03973b82388f15b3/w760_h475_x703_y843_DJI_0144-ce02edbefeada98c.jpg — 200 — 63.4 KiB — 101 ms — h3https://rp-online.de/imgs/32/2/6/1/9/2/3/0/4/5/tok_a0bdaa6d84391af667a693a8d26f0bd5/w760_h475_x1796_y1197_IMG_3639-c6d2c3e2b5f8ec0c.JPG/imgs/32/2/6/1/9/2/3/0/4/5/tok_a0bd... https://rp-online.de/imgs/32/2/6/1/9/2/3/0/4/5/tok_a0bdaa6d84391af667a693a8d26f0bd5/w760_h475_x1796_y1197_IMG_3639-c6d2c3e2b5f8ec0c.JPG — 200 — 78.6 KiB — 161 ms — h3https://rp-online.de/assets/vendor.js?v=1774856308/assets/vendor.js?v=1774856308 https://rp-online.de/assets/vendor.js?v=1774856308 — 200 — 145.6 KiB — 101 ms — h3https://news.google.com/swg/js/v1/swg-gaa.jsnews.google.com/swg/js/v1/swg-gaa.j... https://news.google.com/swg/js/v1/swg-gaa.js — 200 — 27.5 KiB — 16 ms — h2https://applets.ebxcdn.com/ebx.jsapplets.ebxcdn.com/ebx.js https://applets.ebxcdn.com/ebx.js — 200 — 1.0 KiB — 24 ms — h3https://rp-online.de/imgs/32/2/6/4/4/0/8/9/4/9/tok_cd38c78ec33ca7d00827b90625a57cbd/w760_h475_x1796_y1010_rp_mmF95_131225_0369-84d6c70faff61f3e.jpg/imgs/32/2/6/4/4/0/8/9/4/9/tok_cd38... https://rp-online.de/imgs/32/2/6/4/4/0/8/9/4/9/tok_cd38c78ec33ca7d00827b90625a57cbd/w760_h475_x1796_y1010_rp_mmF95_131225_0369-84d6c70faff61f3e.jpg — 200 — 60.2 KiB — 87 ms — h3https://rp-online.de/imgs/32/2/6/4/0/3/5/8/1/3/tok_6c207d9a2d84fe8e43170fdf303e7237/w760_h475_x1796_y1197_rp_kytaro-3210-cce3cae6d8a36003.jpg/imgs/32/2/6/4/0/3/5/8/1/3/tok_6c20... https://rp-online.de/imgs/32/2/6/4/0/3/5/8/1/3/tok_6c207d9a2d84fe8e43170fdf303e7237/w760_h475_x1796_y1197_rp_kytaro-3210-cce3cae6d8a36003.jpg — 200 — 64.2 KiB — 40 ms — h3https://rp-online.de/imgs/32/2/6/3/1/8/5/9/4/9/tok_016df9a9d0877602de2af8803ecf195d/w760_h475_x2541_y1075_han1-10da31f916ea086d.jpg/imgs/32/2/6/3/1/8/5/9/4/9/tok_016d... https://rp-online.de/imgs/32/2/6/3/1/8/5/9/4/9/tok_016df9a9d0877602de2af8803ecf195d/w760_h475_x2541_y1075_han1-10da31f916ea086d.jpg — 200 — 73.2 KiB — 87 ms — h3https://rp-online.de/imgs/32/2/6/3/3/6/4/3/0/1/tok_ce8a2a644b8d1a67987ad096ce420b60/w760_h475_x1024_y628_DPA_dpa_i23j6ljxb2-v8-ax-s2048-7207550a04e47d79.jpeg/imgs/32/2/6/3/3/6/4/3/0/1/tok_ce8a... https://rp-online.de/imgs/32/2/6/3/3/6/4/3/0/1/tok_ce8a2a644b8d1a67987ad096ce420b60/w760_h475_x1024_y628_DPA_dpa_i23j6ljxb2-v8-ax-s2048-7207550a04e47d79.jpeg — 200 — 75.1 KiB — 64 ms — h3https://rp-online.de/imgs/32/2/6/0/9/0/5/2/2/7/tok_de63907e253546d0004a887a2e1062ac/w760_h475_x1203_y956_Haematologie_RAW_0002-4b9f85fe3416883e.jpg/imgs/32/2/6/0/9/0/5/2/2/7/tok_de63... https://rp-online.de/imgs/32/2/6/0/9/0/5/2/2/7/tok_de63907e253546d0004a887a2e1062ac/w760_h475_x1203_y956_Haematologie_RAW_0002-4b9f85fe3416883e.jpg — 200 — 40.5 KiB — 47 ms — h3
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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
61% of JavaScript execution is third-party
First-party Third-party 1315ms · 468KB · €6/mo
Unattributable
Other
Costly
Execution 546ms
Transfer 0 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 324ms
Transfer 150 KB
Unused 42%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 214ms
Transfer 126 KB
Unused 52%
Monthly Cost €1/mo
tagrpd.de
Other
Optional
Execution 109ms
Transfer 25 KB
Monthly Cost €1/mo
accounts.google.com
Other
Optional
Execution 66ms
Transfer 96 KB
Unused 85%
Monthly Cost €0/mo
news.google.com
Other
Optional
Execution 56ms
Transfer 71 KB
Unused 69%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 546ms and costs ~€3/month
  • Google Tag Manager adds 324ms and costs ~€2/month
  • Google Tag Manager adds 214ms and costs ~€1/month

61% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 546ms 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 324ms 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 214ms 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 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

85% of accounts.google.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

69% of news.google.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

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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