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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
1
REVIEW
4
PASS
10
INFO
2

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

Mobile Desktop
48
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
82
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.
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.

3.18 s

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

9.01 s

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

234 ms

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

0.272

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

5.26 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.

9.04 s

Page Load Progression

477 ms
954 ms
1.4 s
1.9 s
2.4 s
2.9 s
3.3 s
3.8 s
Checks
17
10 PASS 4 REVIEW 1 FIX
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 (1.0 MiB of 1.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
B
Image Optimization
16 images, 0 KB saveable
REVIEW
16 images, 0 KB saveable
Info::
All images are well-optimized
16 images 284 KB
0 oversized -0 KB
6 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1666ms total JS execution
REVIEW
1666ms total JS execution
Warning::
https://consent.cookiebot.com/uc.js: 626ms CPU time
Warning::
https://www.provenexpert.com/en-us/: 520ms CPU time
Info::
https://www.provenexpert.com/js/main.js?v=2ac: 221ms CPU time
Info::
Unattributable: 215ms CPU time
Info::
https://s.provenexpert.net/seals/proseal-v2.js: 84ms CPU time
Warning::
Third-party scripts: 1666ms (100% of total)

Main Thread Breakdown

Script Evaluation 31% Other 26% Parse HTML & CSS 19% Style & Layout 12% Script Parsing & Compilation 8% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://consent.cookiebot.com/uc.js626ms318ms14ms3rd
https://www.provenexpert.com/en-us/520ms14ms4ms3rd
https://www.provenexpert.com/js/main.js?v=2ac221ms122ms68ms3rd
Unattributable215ms8ms0ms3rd
https://s.provenexpert.net/seals/proseal-v2.js84ms60ms18ms3rd
C
JS Bundles
Action
5 scripts, 172 KB unused
REVIEW
5 scripts, 172 KB unused
Warning::
https://www.provenexpert.com/js/main.js?v=2ac: 126 KB unused (84%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/e89874dc-49a1-4fa1-9...: 25 KB unused (22%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/uc.js: 21 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 172 KB
172 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.provenexpert.com/js/main.js?v=2ac151 KB126 KB (84%)✓3rd
https://consent.cookiebot.com/e89874dc-49a1-4fa1-9cec-8c95488ed95c/cc.js?renew=false&referer=www.provenexpert.com&dnt=false&init=false&culture=EN114 KB25 KB (22%)✓3rd
https://consent.cookiebot.com/uc.js36 KB21 KB (60%)✓3rd
https://www.provenexpert.com/js/locale/us.js?v=2ac3 KB—✓3rd
https://s.provenexpert.net/seals/proseal-v2.js91 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

B
HTTP Caching
private
REVIEW
private
Info::
Cache-Control header is set
Got: private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
A
Page Weight Budget
1.0 MB transferred, 35 requests
PASS
1.0 MB transferred, 35 requests
Info::
Page weighs 2.8 MB (1.0 MB transferred)
Info::
Fonts are 227 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 227 KB
Info::
35 HTTP requests
Info::
Estimated 0.22 g CO2 per page load
1.0 MB / 2.4 MB budget
1.0 MB transferred
35 requests
0.22 g CO2 per page load
JavaScript 394.0 KiB 37%
Images 283.8 KiB 27%
Fonts 227.1 KiB 22%
CSS 126.2 KiB 12%
HTML 14.2 KiB 1%
Other 2.8 KiB 0%
Other 1.9 KiB 0%
Other 981 B 0%
0 2.4 MB 4.9 MB
Under budget

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

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
6 fonts (227 KB)
PASS
6 fonts (227 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

227 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 3.2 s LCP 9.0 shttps://www.provenexpert.com/webfonts/fontawesome-webfont.woff?v=4.0.3fontawesome-webfont.woff https://www.provenexpert.com/webfonts/fontawesome-webfont.woff?v=4.0.3 — 95.8 KiB — 91 ms — font-display: swaphttps://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-extralight-webfont.wofftitilliumweb-extralight... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-extralight-webfont.woff — 25.9 KiB — 81 ms — font-display: swaphttps://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-light-webfont.wofftitilliumweb-light-webf... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-light-webfont.woff — 26.9 KiB — 79 ms — font-display: swaphttps://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-regular-webfont.wofftitilliumweb-regular-we... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-regular-webfont.woff — 26.7 KiB — 80 ms — font-display: swaphttps://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-semibold-webfont.wofftitilliumweb-semibold-w... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-semibold-webfont.woff — 26.5 KiB — 79 ms — font-display: swaphttps://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-bold-webfont.wofftitilliumweb-bold-webfo... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-bold-webfont.woff — 25.4 KiB — 78 ms — font-display: swap
fontawesome-webfont.woff woff swap
Size 96 KB
Load time 91 ms
Start 260 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
titilliumweb-extralight... woff swap
Size 26 KB
Load time 81 ms
Start 261 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
titilliumweb-light-webf... woff swap
Size 27 KB
Load time 79 ms
Start 261 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
titilliumweb-regular-we... woff swap
Size 27 KB
Load time 80 ms
Start 261 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
titilliumweb-semibold-w... woff swap
Size 26 KB
Load time 79 ms
Start 261 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
titilliumweb-bold-webfo... woff swap
Size 25 KB
Load time 78 ms
Start 261 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 ~68 KB and ~136 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
8 hints, 0 missing preconnects
PASS
8 hints, 0 missing preconnects
Info::
Page uses 8 resource hint(s)

Current Resource Hints

preconnect
—
preload
8
dns-prefetch
—
prefetch
—

8 resource hints configured

A
Page Weight Inventory
35 resources · 1.0 MB · 172 KB savings available
PASS
35 resources · 1.0 MB · 172 KB savings available
Warning::
Page weight 27 KB over 1MB target
Got: 1.0 MB Expected: ≤ 1 MB
Info::
~172 KB of savings available
Warning::
34 third-party resources (100% of weight)
35 resources · 1.0 MiB · 34 third-party 26.9 KiB over 1MB target
JavaScript 37% · 394.0 KiB
Image 27% · 285.7 KiB
Font 22% · 227.1 KiB
CSS 12% · 126.2 KiB
Document 1% · 15.1 KiB
Other 0% · 2.8 KiB

~172.5 KiB of savings available

Remove unused JavaScript: 172.5 KiB
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: Google Cloud

Network Waterfall
35 requests over 1433ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 3.2 s LCP 9.0 shttps://provenexpert.com// https://provenexpert.com/ — 308 — 140 B — 65 ms — h2https://www.provenexpert.com/www.provenexpert.com/ https://www.provenexpert.com/ — 302 — 799 B — 71 ms — h2https://www.provenexpert.com/en-us/www.provenexpert.com/en-us/ https://www.provenexpert.com/en-us/ — 200 — 13.4 KiB — 120 ms — h2https://consent.cookiebot.com/uc.jsconsent.cookiebot.com/uc.js https://consent.cookiebot.com/uc.js — 200 — 35.7 KiB — 67 ms — h2https://www.provenexpert.com/webfonts/fontawesome-webfont.woff?v=4.0.3www.provenexpert.com/webfonts/fonta... https://www.provenexpert.com/webfonts/fontawesome-webfont.woff?v=4.0.3 — 200 — 95.8 KiB — 91 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-extralight-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-extralight-webfont.woff — 200 — 25.9 KiB — 81 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-light-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-light-webfont.woff — 200 — 26.9 KiB — 79 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-regular-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-regular-webfont.woff — 200 — 26.7 KiB — 80 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-semibold-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-semibold-webfont.woff — 200 — 26.5 KiB — 79 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-bold-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-bold-webfont.woff — 200 — 25.4 KiB — 78 ms — h3https://www.provenexpert.com/css/main.css?v=2acwww.provenexpert.com/css/main.css?v... https://www.provenexpert.com/css/main.css?v=2ac — 200 — 126.2 KiB — 60 ms — h3https://www.provenexpert.com/images/start/team/julia.webpwww.provenexpert.com/images/start/t... https://www.provenexpert.com/images/start/team/julia.webp — 200 — 19.0 KiB — 89 ms — h3https://www.provenexpert.com/js/locale/us.js?v=2acwww.provenexpert.com/js/locale/us.j... https://www.provenexpert.com/js/locale/us.js?v=2ac — 200 — 2.7 KiB — 88 ms — h3https://consentcdn.cookiebot.com/consentconfig/e89874dc-49a1-4fa1-9cec-8c95488ed95c/settings.jsonconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/e89874dc-49a1-4fa1-9cec-8c95488ed95c/settings.json — 200 — 981 B — 52 ms — h2https://www.provenexpert.com/js/main.js?v=2acwww.provenexpert.com/js/main.js?v=2... https://www.provenexpert.com/js/main.js?v=2ac — 200 — 150.9 KiB — 29 ms — h3https://www.provenexpert.com/images/en-us/home/slider/slider-0_mobile.webpwww.provenexpert.com/images/en-us/h... https://www.provenexpert.com/images/en-us/home/slider/slider-0_mobile.webp — 200 — 5.9 KiB — 27 ms — h3https://consent.cookiebot.com/e89874dc-49a1-4fa1-9cec-8c95488ed95c/cc.js?renew=false&referer=www.provenexpert.com&dnt=false&init=false&culture=ENconsent.cookiebot.com/e89874dc-49a1... https://consent.cookiebot.com/e89874dc-49a1-4fa1-9cec-8c95488ed95c/cc.js?renew=false&referer=www.provenexpert.com&dnt=false&init=false&culture=EN — 200 — 113.7 KiB — 70 ms — h2https://www.provenexpert.com/images/de-de/logo/proven_expert_black_claim.svgwww.provenexpert.com/images/de-de/l... https://www.provenexpert.com/images/de-de/logo/proven_expert_black_claim.svg — 200 — 2.7 KiB — 23 ms — h3https://www.provenexpert.com/images/language/flag/en-us.svgwww.provenexpert.com/images/languag... https://www.provenexpert.com/images/language/flag/en-us.svg — 200 — 610 B — 25 ms — h3https://www.provenexpert.com/images/start/icons/blue/chartIcon.svgwww.provenexpert.com/images/start/i... https://www.provenexpert.com/images/start/icons/blue/chartIcon.svg — 200 — 587 B — 28 ms — h3https://www.provenexpert.com/images/start/icons/blue/peopleIcon.svgwww.provenexpert.com/images/start/i... https://www.provenexpert.com/images/start/icons/blue/peopleIcon.svg — 200 — 704 B — 30 ms — h3https://www.provenexpert.com/images/start/icons/blue/wandIcon.svgwww.provenexpert.com/images/start/i... https://www.provenexpert.com/images/start/icons/blue/wandIcon.svg — 200 — 646 B — 31 ms — h3https://www.provenexpert.com/images/start/testimonials/testimonials.webpwww.provenexpert.com/images/start/t... https://www.provenexpert.com/images/start/testimonials/testimonials.webp — 200 — 125.6 KiB — 37 ms — h3https://www.provenexpert.com/images/en-us/start/home/coffee_bg_mobile.webpwww.provenexpert.com/images/en-us/s... https://www.provenexpert.com/images/en-us/start/home/coffee_bg_mobile.webp — 200 — 30.0 KiB — 35 ms — h3https://www.provenexpert.com/images/en-us/start/home/laptop-mit-profil-new.webpwww.provenexpert.com/images/en-us/s... https://www.provenexpert.com/images/en-us/start/home/laptop-mit-profil-new.webp — 200 — 29.0 KiB — 36 ms — h3https://www.provenexpert.com/images/en-us/start/home/ipad-google_mobile.webpwww.provenexpert.com/images/en-us/s... https://www.provenexpert.com/images/en-us/start/home/ipad-google_mobile.webp — 200 — 46.7 KiB — 36 ms — h3https://www.provenexpert.com/images/en-us/start/home/bewertungssiegel-provenexpert_mobile.webpwww.provenexpert.com/images/en-us/s... https://www.provenexpert.com/images/en-us/start/home/bewertungssiegel-provenexpert_mobile.webp — 200 — 22.0 KiB — 36 ms — h3https://www.provenexpert.com/images/icons/svg/x-icon.svgwww.provenexpert.com/images/icons/s... https://www.provenexpert.com/images/icons/svg/x-icon.svg — 200 — 366 B — 33 ms — h3https://consentcdn.cookiebot.com/sdk/bc-v4.min.htmlconsentcdn.cookiebot.com/sdk/bc-v4.... https://consentcdn.cookiebot.com/sdk/bc-v4.min.html — 200 — 809 B — 9 ms — h2https://s.provenexpert.net/seals/proseal-v2.jss.provenexpert.net/seals/proseal-v2... https://s.provenexpert.net/seals/proseal-v2.js — 200 — 90.9 KiB — 124 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 3.2 s LCP 9.0 shttps://provenexpert.com// https://provenexpert.com/ — 308 — 140 B — 65 ms — h2https://www.provenexpert.com/www.provenexpert.com/ https://www.provenexpert.com/ — 302 — 799 B — 71 ms — h2https://www.provenexpert.com/en-us/www.provenexpert.com/en-us/ https://www.provenexpert.com/en-us/ — 200 — 13.4 KiB — 120 ms — h2https://consent.cookiebot.com/uc.jsconsent.cookiebot.com/uc.js https://consent.cookiebot.com/uc.js — 200 — 35.7 KiB — 67 ms — h2https://www.provenexpert.com/webfonts/fontawesome-webfont.woff?v=4.0.3www.provenexpert.com/webfonts/fonta... https://www.provenexpert.com/webfonts/fontawesome-webfont.woff?v=4.0.3 — 200 — 95.8 KiB — 91 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-extralight-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-extralight-webfont.woff — 200 — 25.9 KiB — 81 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-light-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-light-webfont.woff — 200 — 26.9 KiB — 79 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-regular-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-regular-webfont.woff — 200 — 26.7 KiB — 80 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-semibold-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-semibold-webfont.woff — 200 — 26.5 KiB — 79 ms — h3https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-bold-webfont.woffwww.provenexpert.com/webfonts/titil... https://www.provenexpert.com/webfonts/titillium_ext_latin/titilliumweb-bold-webfont.woff — 200 — 25.4 KiB — 78 ms — h3https://www.provenexpert.com/css/main.css?v=2acwww.provenexpert.com/css/main.css?v... https://www.provenexpert.com/css/main.css?v=2ac — 200 — 126.2 KiB — 60 ms — h3https://www.provenexpert.com/images/start/team/julia.webpwww.provenexpert.com/images/start/t... https://www.provenexpert.com/images/start/team/julia.webp — 200 — 19.0 KiB — 89 ms — h3https://www.provenexpert.com/js/locale/us.js?v=2acwww.provenexpert.com/js/locale/us.j... https://www.provenexpert.com/js/locale/us.js?v=2ac — 200 — 2.7 KiB — 88 ms — h3https://consentcdn.cookiebot.com/consentconfig/e89874dc-49a1-4fa1-9cec-8c95488ed95c/settings.jsonconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/e89874dc-49a1-4fa1-9cec-8c95488ed95c/settings.json — 200 — 981 B — 52 ms — h2https://www.provenexpert.com/js/main.js?v=2acwww.provenexpert.com/js/main.js?v=2... https://www.provenexpert.com/js/main.js?v=2ac — 200 — 150.9 KiB — 29 ms — h3https://www.provenexpert.com/images/en-us/home/slider/slider-0_mobile.webpwww.provenexpert.com/images/en-us/h... https://www.provenexpert.com/images/en-us/home/slider/slider-0_mobile.webp — 200 — 5.9 KiB — 27 ms — h3https://consent.cookiebot.com/e89874dc-49a1-4fa1-9cec-8c95488ed95c/cc.js?renew=false&referer=www.provenexpert.com&dnt=false&init=false&culture=ENconsent.cookiebot.com/e89874dc-49a1... https://consent.cookiebot.com/e89874dc-49a1-4fa1-9cec-8c95488ed95c/cc.js?renew=false&referer=www.provenexpert.com&dnt=false&init=false&culture=EN — 200 — 113.7 KiB — 70 ms — h2https://www.provenexpert.com/images/de-de/logo/proven_expert_black_claim.svgwww.provenexpert.com/images/de-de/l... https://www.provenexpert.com/images/de-de/logo/proven_expert_black_claim.svg — 200 — 2.7 KiB — 23 ms — h3https://www.provenexpert.com/images/language/flag/en-us.svgwww.provenexpert.com/images/languag... https://www.provenexpert.com/images/language/flag/en-us.svg — 200 — 610 B — 25 ms — 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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
100% of JavaScript execution is third-party
First-party Third-party 1666ms · 291KB · €9/mo
consent.cookiebot.com
Other
Costly
Execution 626ms
Transfer 36 KB
Unused 60%
Monthly Cost €3/mo
www.provenexpert.com
Other
Costly
Execution 520ms
Transfer 13 KB
Monthly Cost €3/mo
www.provenexpert.com
Other
Costly
Execution 221ms
Transfer 151 KB
Unused 84%
Monthly Cost €1/mo
Unattributable
Other
Costly
Execution 215ms
Transfer 0 KB
Monthly Cost €1/mo
s.provenexpert.net
Other
Optional
Execution 84ms
Transfer 91 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • consent.cookiebot.com adds 626ms and costs ~€3/month
  • www.provenexpert.com adds 520ms and costs ~€3/month
  • www.provenexpert.com adds 221ms and costs ~€1/month
  • Unattributable adds 215ms and costs ~€1/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

consent.cookiebot.com takes 626ms 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

60% of consent.cookiebot.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

www.provenexpert.com takes 520ms 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.provenexpert.com takes 221ms 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

84% of www.provenexpert.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

Unattributable takes 215ms 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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