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https://spektrum.de

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
6
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
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.

4.02 s

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

12.93 s

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

2.19 s

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

2.081

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

8.77 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.

16.36 s

Page Load Progression

547 ms
1.1 s
1.6 s
2.2 s
2.7 s
3.3 s
3.8 s
4.4 s
Checks
17
8 PASS 3 REVIEW 4 FIX
D
Page Weight Budget
Action
2.2 MB transferred, 78 requests
FIX
2.2 MB transferred, 78 requests
Info::
Page weighs 6.6 MB (2.2 MB transferred)
Warning::
JavaScript is 1018 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1018 KB
Info::
Fonts are 495 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 495 KB
Info::
78 HTTP requests
Info::
Estimated 0.45 g CO2 per page load
2.2 MB / 2.4 MB budget
2.2 MB transferred
78 requests
0.45 g CO2 per page load
JavaScript 1018.2 KiB 46%
Fonts 494.7 KiB 22%
Images 293.2 KiB 13%
Other 208.6 KiB 9%
CSS 78.0 KiB 4%
Other 44.0 KiB 2%
Other 34.7 KiB 2%
HTML 34.0 KiB 2%
Other 395 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

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
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.2 MiB of 2.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
8812ms total JS execution
FIX
8812ms total JS execution
Warning::
https://static.spektrum.de/js_css/assets/js/app.js: 2333ms CPU time
Warning::
https://www.spektrum.de/: 1770ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NV9...: 1091ms CPU time
Warning::
https://cdn.cookielaw.org/scripttemplates/202604.1...: 783ms CPU time
Warning::
Unattributable: 724ms CPU time
Warning::
Third-party scripts: 8812ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 18% Style & Layout 17% Script Parsing & Compilation 6% Rendering 5% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://static.spektrum.de/js_css/assets/js/app.js2333ms1278ms78ms3rd
https://www.spektrum.de/1770ms37ms6ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NV9D2M1091ms866ms84ms3rd
https://cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js783ms458ms98ms3rd
Unattributable724ms14ms0ms3rd
https://cdn.cookielaw.org/scripttemplates/202604.1.0/otTCF.js648ms575ms11ms3rd
https://www.googletagmanager.com/gtag/js?id=G-YXNVZ6NX0G&cx=c&gtm=4e64k1h1456ms387ms64ms3rd
https://static.spektrum.de/js_css/iqd/cdn_spektrum_mob_digt/live/iqadcontroller.js414ms203ms110ms3rd
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js?did=69405b66-21db-433c-a550-4b18074a0f51180ms135ms4ms3rd
https://assets.poool.fr/access.min.js157ms135ms18ms3rd

Showing top 10 of 13 scripts

D
Page Weight Inventory
Action
78 resources · 2.2 MB · 295 KB savings available
FIX
78 resources · 2.2 MB · 295 KB savings available
Warning::
Page weight 1.2 MB over 1MB target
Got: 2.2 MB Expected: ≤ 1 MB
Info::
~295 KB of savings available
Warning::
77 third-party resources (100% of weight)
78 resources · 2.2 MiB · 77 third-party 1.2 MiB over 1MB target
JavaScript 46% · 1018.2 KiB
Font 23% · 497.0 KiB
Image 13% · 297.7 KiB
Other 12% · 275.7 KiB
CSS 4% · 82.7 KiB
Document 2% · 34.5 KiB

~294.9 KiB of savings available

Remove unused JavaScript: 294.9 KiB
B
Image Optimization
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Warning::
https://www.spektrum.de/pix/fallback.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
10 images 293 KB
0 oversized -0 KB
3 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
JS Bundles
Action
22 scripts, 295 KB unused
REVIEW
22 scripts, 295 KB unused
Warning::
https://static.spektrum.de/js_css/assets/js/app.js: 94 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NV9...: 74 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-YXNV...: 65 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202604.1...: 62 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 295 KB
295 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.spektrum.de/js_css/assets/js/app.js140 KB94 KB (67%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NV9D2M171 KB74 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-YXNVZ6NX0G&cx=c&gtm=4e64k1h1172 KB65 KB (38%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js131 KB62 KB (47%)✓3rd
https://www.spektrum.de/js_css/ouibounce/ouibounce.min.js1 KB—✓3rd
https://assets.poool.fr/vendor-audit.min.js1 KB—✓3rd
https://static.spektrum.de/js_css/iqd/cdn_spektrum_mob_digt/live/iqadcontroller.js69 KB—✓3rd
https://cdn.cookielaw.org/scripttemplates/202604.1.0/otTCF.js18 KB—✓3rd
https://assets.poool.fr/engage.min.js19 KB—✓3rd
https://assets.poool.fr/access.min.js31 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

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
15 fonts (497 KB)
PASS
15 fonts (497 KB)
Info::
15 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

15

497 KB total

Render-blocking

0

of 15

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 FCP 4.0 s LCP 12.9 shttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-normal.woff2Roboto_Condensed-300-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-normal.woff2 — 20.8 KiB — 215 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-normal.woff2Roboto_Condensed-400-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-normal.woff2 — 20.5 KiB — 237 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-normal.woff2Roboto_Condensed-700-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-normal.woff2 — 20.8 KiB — 229 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-italic.woff2Roboto_Condensed-300-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-italic.woff2 — 22.4 KiB — 405 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-italic.woff2Roboto_Condensed-400-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-italic.woff2 — 22.0 KiB — 225 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-italic.woff2Roboto_Condensed-700-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-italic.woff2 — 22.4 KiB — 220 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-brands-400.woff2 — 116.3 KiB — 245 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-regular-400.woff2 — 25.1 KiB — 220 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-solid-900.woff2 — 154.8 KiB — 243 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-ext-normal.woff2Roboto_Condensed-700-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-ext-normal.woff2 — 14.2 KiB — 8 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-ext-normal.woff2Roboto_Condensed-300-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-ext-normal.woff2 — 13.9 KiB — 5 ms — font-display: swaphttps://cdn.poool.fr/assets/fonts/poool-ico-2/1.3.0/Poool-Ico-2.woff?vdi71fPoool-Ico-2.woff https://cdn.poool.fr/assets/fonts/poool-ico-2/1.3.0/Poool-Ico-2.woff?vdi71f — 2.2 KiB — 61 ms — font-display: swaphttps://cdn.poool.fr/assets/fonts/poool-ico-2/1.3.0/Poool-Ico-2.ttf?vdi71fPoool-Ico-2.ttf https://cdn.poool.fr/assets/fonts/poool-ico-2/1.3.0/Poool-Ico-2.ttf?vdi71f — 0 B — 2 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-normal.woff2Roboto_Condensed-700-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-normal.woff2 — 20.8 KiB — 14 ms — font-display: swaphttps://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-normal.woff2Roboto_Condensed-400-la... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-normal.woff2 — 20.7 KiB — 11 ms — font-display: swap
Roboto_Condensed-300-la... woff2 swap
Size 21 KB
Load time 215 ms
Start 618 ms
Risk FOUT — text flashes from fallback to web font
Roboto_Condensed-400-la... woff2 swap
Size 21 KB
Load time 237 ms
Start 619 ms
Risk FOUT — text flashes from fallback to web font
Roboto_Condensed-700-la... woff2 swap
Size 21 KB
Load time 229 ms
Start 619 ms
Risk FOUT — text flashes from fallback to web font
Roboto_Condensed-300-la... woff2 swap
Size 22 KB
Load time 405 ms
Start 619 ms
Risk FOUT — text flashes from fallback to web font
Roboto_Condensed-400-la... woff2 swap
Size 22 KB
Load time 225 ms
Start 619 ms
Risk FOUT — text flashes from fallback to web font
Roboto_Condensed-700-la... woff2 swap
Size 22 KB
Load time 220 ms
Start 620 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 116 KB
Load time 245 ms
Start 620 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
fa-regular-400.woff2 woff2 swap
Size 25 KB
Load time 220 ms
Start 621 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 155 KB
Load time 243 ms
Start 621 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
Roboto_Condensed-700-la... woff2 swap
Size 14 KB
Load time 8 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
Roboto_Condensed-300-la... woff2 swap
Size 14 KB
Load time 5 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
Poool-Ico-2.woff woff swap
Size 2 KB
Load time 61 ms
Start 3.7 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Poool-Ico-2.ttf ttf swap
Size 0 KB
Load time 2 ms
Start 4.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Roboto_Condensed-700-la... woff2 swap
Size 21 KB
Load time 14 ms
Start 4.2 s
Risk FOUT — text flashes from fallback to web font
Roboto_Condensed-400-la... woff2 swap
Size 21 KB
Load time 11 ms
Start 4.2 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 ~136 KB and ~272 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
12 hints, 0 missing preconnects
PASS
12 hints, 0 missing preconnects
Info::
Page uses 12 resource hint(s)

Current Resource Hints

preconnect
3
preload
9
dns-prefetch
—
prefetch
—

12 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=86400 (1 day)
PASS
max-age=86400 (1 day)
Info::
Cache-Control header is set
Got: max-age=86400
Info::
Effective TTL: 1 day (max-age=86400)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=86400

DirectiveValueMeaning
max-age86400Cache for 1 day
Effective TTL: 86400 seconds
Network Waterfall
78 requests over 4214ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 4.0 s LCP 12.9 shttps://spektrum.de// https://spektrum.de/ — 301 — 197 B — 393 ms — h2https://www.spektrum.de/www.spektrum.de/ https://www.spektrum.de/ — 200 — 32.8 KiB — 208 ms — h2https://static.spektrum.de/js_css/assets/js/jquery.min.jsstatic.spektrum.de/js_css/assets/js... https://static.spektrum.de/js_css/assets/js/jquery.min.js — 200 — 29.1 KiB — 231 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-normal.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-normal.woff2 — 200 — 20.8 KiB — 215 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-normal.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-normal.woff2 — 200 — 20.5 KiB — 237 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-normal.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-normal.woff2 — 200 — 20.8 KiB — 229 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-italic.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-300-latin-italic.woff2 — 200 — 22.4 KiB — 405 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-italic.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-italic.woff2 — 200 — 22.0 KiB — 225 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-italic.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-italic.woff2 — 200 — 22.4 KiB — 220 ms — h2https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-brands-400.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-brands-400.woff2 — 200 — 116.3 KiB — 245 ms — h2https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-regular-400.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-regular-400.woff2 — 200 — 25.1 KiB — 220 ms — h2https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-solid-900.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/fontawesome/webfonts/fa-solid-900.woff2 — 200 — 154.8 KiB — 243 ms — h2https://static.spektrum.de/js_css/assets/css/app.cssstatic.spektrum.de/js_css/assets/cs... https://static.spektrum.de/js_css/assets/css/app.css — 200 — 77.0 KiB — 230 ms — 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https://assets.poool.fr/vendor-poool-trim-html.min.js — 200 — 1.2 KiB — 14 ms — h2https://assets.poool.fr/vendor-access.min.jsassets.poool.fr/vendor-access.min.j... https://assets.poool.fr/vendor-access.min.js — 200 — 10.3 KiB — 18 ms — h2https://assets.poool.fr/advanced-paywall-frame.htmlassets.poool.fr/advanced-paywall-fr... https://assets.poool.fr/advanced-paywall-frame.html — 200 — 1.2 KiB — 33 ms — h2https://assets.poool.fr/advanced-paywall-frame.min.jsassets.poool.fr/advanced-paywall-fr... https://assets.poool.fr/advanced-paywall-frame.min.js — 200 — 157.1 KiB — 43 ms — h2https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516 — 200 — 10.7 KiB — 47 ms — h2https://cdn.poool.fr/assets/fonts/google/open-sans/os-regular.woff2cdn.poool.fr/assets/fonts/google/op... 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h2https://assets.poool.fr/vendor-buddy-v3.min.jsassets.poool.fr/vendor-buddy-v3.min... https://assets.poool.fr/vendor-buddy-v3.min.js — 200 — 3.0 KiB — 14 ms — h2https://assets.poool.fr/969.jsassets.poool.fr/969.js https://assets.poool.fr/969.js — 200 — 13.2 KiB — 16 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/fonts.cssstatic.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/fonts.css — 200 — 1.0 KiB — 215 ms — h2https://cdn.poool.fr/assets/fonts/poool-ico-2/1.3.0/Poool-Ico-2.ttf?vdi71fcdn.poool.fr/assets/fonts/poool-ico... https://cdn.poool.fr/assets/fonts/poool-ico-2/1.3.0/Poool-Ico-2.ttf?vdi71f — 200 — 0 B — 2 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-normal.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-700-latin-normal.woff2 — 200 — 20.8 KiB — 14 ms — h2https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-normal.woff2static.spektrum.de/js_css/assets/fo... https://static.spektrum.de/js_css/assets/fonts/custom/Roboto_Condensed-400-latin-normal.woff2 — 200 — 20.7 KiB — 11 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 8812ms · 816KB · €96/mo
static.spektrum.de
Other
Costly
Execution 2333ms
Transfer 140 KB
Unused 67%
Monthly Cost €25/mo
www.spektrum.de
Other
Costly
Execution 1770ms
Transfer 33 KB
Monthly Cost €19/mo
Google Tag Manager
Tag Manager
Costly
Execution 1091ms
Transfer 171 KB
Unused 44%
Monthly Cost €12/mo
OneTrust
Consent
Essential
Execution 783ms
Transfer 131 KB
Unused 47%
Monthly Cost €8/mo
Unattributable
Other
Costly
Execution 724ms
Transfer 0 KB
Monthly Cost €8/mo
OneTrust
Consent
Essential
Execution 648ms
Transfer 18 KB
Monthly Cost €7/mo
Google Tag Manager
Tag Manager
Costly
Execution 456ms
Transfer 172 KB
Unused 38%
Monthly Cost €5/mo
static.spektrum.de
Other
Costly
Execution 414ms
Transfer 69 KB
Monthly Cost €4/mo
OneTrust
Consent
Essential
Execution 180ms
Transfer 9 KB
Monthly Cost €2/mo
assets.poool.fr
Other
Optional
Execution 157ms
Transfer 31 KB
Monthly Cost €2/mo
static.spektrum.de
Other
Optional
Execution 105ms
Transfer 29 KB
Monthly Cost €1/mo
assets.poool.fr
Other
Optional
Execution 89ms
Transfer 10 KB
Monthly Cost €1/mo
assets.poool.fr
Other
Optional
Execution 60ms
Transfer 3 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • static.spektrum.de adds 2333ms and costs ~€25/month
  • www.spektrum.de adds 1770ms and costs ~€19/month
  • Google Tag Manager adds 1091ms and costs ~€12/month
  • Unattributable adds 724ms and costs ~€8/month
  • Google Tag Manager adds 456ms and costs ~€5/month
  • static.spektrum.de adds 414ms 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

static.spektrum.de takes 2333ms 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

67% of static.spektrum.de'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

www.spektrum.de takes 1770ms 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 1091ms 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 724ms 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 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

static.spektrum.de takes 414ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

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

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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