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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
54
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
58
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

61.65 s

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

65.88 s

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

94 ms

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

0.000

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

61.65 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.

67.37 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
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
12.3 MB transferred, 94 requests
FIX
12.3 MB transferred, 94 requests
Critical::
Page weighs 29.7 MB (12.3 MB transferred)
Info::
CSS is 10.9 MB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 10.9 MB
Warning::
JavaScript is 744 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 744 KB
Info::
94 HTTP requests
Info::
Estimated 2.6 g CO2 per page load
12.3 MB / 2.4 MB budget
12.3 MB transferred
94 requests
2.6 g CO2 per page load
CSS 10.9 MiB 89%
JavaScript 744.0 KiB 6%
Images 584.2 KiB 5%
HTML 51.8 KiB 0%
Fonts 35.8 KiB 0%
Other 10.9 KiB 0%
Other 6.3 KiB 0%
Other 1.0 KiB 0%
0 2.4 MB 4.9 MB
Over budget

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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

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 (12.3 MiB of 12.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
17351ms total JS execution
FIX
17351ms total JS execution
Warning::
https://cdn.infoq.com/statics_s1_20260421232814/sc...: 12822ms CPU time
Warning::
https://www.infoq.com/: 2920ms CPU time
Warning::
Unattributable: 388ms CPU time
Warning::
https://cc.cdn.civiccomputing.com/9/cookieControl-...: 337ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-VMVP...: 225ms CPU time
Warning::
Third-party scripts: 17351ms (100% of total)

Main Thread Breakdown

Other 75% Style & Layout 16% Script Evaluation 6%
ScriptTotalScriptingParse/CompileParty
https://cdn.infoq.com/statics_s1_20260421232814/scripts/combinedJs.min.js12822ms183ms20ms3rd
https://www.infoq.com/2920ms123ms18ms3rd
Unattributable388ms1ms0ms3rd
https://cc.cdn.civiccomputing.com/9/cookieControl-9.x.min.js337ms229ms36ms3rd
https://www.googletagmanager.com/gtag/js?id=G-VMVPD4D2JY&cx=c&gtm=4e64h1h1225ms174ms34ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W9GJ5DL172ms139ms33ms3rd
https://cdn.infoq.com/statics_s1_20260421232814/scripts/infoq.js163ms70ms37ms3rd
https://connect.facebook.net/en_US/fbevents.js152ms90ms62ms3rd
https://connect.facebook.net/signals/config/842388869148196?v=2.9.303&r=stable&domain=www.infoq.com&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168115ms101ms14ms3rd
https://cdn.infoq.com/statics_s1_20260421232814/styles/style.css57ms0ms0ms3rd
D
JS Bundles
Action
10 scripts, 329 KB unused
FIX
10 scripts, 329 KB unused
Warning::
https://cdn.infoq.com/statics_s1_20260421232814/sc...: 75 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-VMVP...: 67 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-W9G...: 64 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cc.cdn.civiccomputing.com/9/cookieControl-...: 57 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.infoq.com/statics_s1_20260421232814/sc...: 34 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 329 KB
329 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.infoq.com/statics_s1_20260421232814/scripts/infoq.js115 KB75 KB (65%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-VMVPD4D2JY&cx=c&gtm=4e64h1h1159 KB67 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W9GJ5DL129 KB64 KB (50%)✓3rd
https://cc.cdn.civiccomputing.com/9/cookieControl-9.x.min.js123 KB57 KB (47%)✓3rd
https://cdn.infoq.com/statics_s1_20260421232814/scripts/combinedJs.min.js58 KB34 KB (58%)✓3rd
https://connect.facebook.net/en_US/fbevents.js97 KB32 KB (34%)✓3rd
https://cdn.infoq.com/statics_s1_20260421232814/scripts/relatedVcr.min.js6 KB—✓3rd
https://plausible.io/js/script.file-downloads.hash.outbound-links.pageview-props.tagged-events.js3 KB—✓3rd
https://cdn.infoq.com/statics_s1_20260421232814/scripts/lib/browser-update-org/update.js7 KB—✓3rd
https://connect.facebook.net/signals/config/842388869148196?v=2.9.303&r=stable&domain=www.infoq.com&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C16847 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

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
Page Weight Inventory
Action
94 resources · 12.3 MB · 329 KB savings available
FIX
94 resources · 12.3 MB · 329 KB savings available
Warning::
Page weight 11.3 MB over 1MB target
Got: 12.3 MB Expected: ≤ 1 MB
Info::
~329 KB of savings available
Warning::
93 third-party resources (100% of weight)
Info::
3 resources over 200KB
94 resources · 12.3 MiB · 93 third-party 11.3 MiB over 1MB target
CSS 89% · 10.9 MiB
JavaScript 6% · 744.0 KiB
Image 5% · 590.0 KiB
Document 0% · 52.3 KiB
Font 0% · 35.8 KiB
Other 0% · 12.0 KiB

~328.9 KiB of savings available

Remove unused JavaScript: 328.9 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
60 images, 0 KB saveable
REVIEW
60 images, 0 KB saveable
Info::
All images are well-optimized
60 images 584 KB
0 oversized -0 KB
8 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
2 fonts (36 KB)
PASS
2 fonts (36 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

36 KB total

Render-blocking

0

of 2

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 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s 64.0 s 66.0 s 68.0 s FCP 61.7 s LCP 65.9 shttps://cdn.infoq.com/statics_s1_20260421232814/styles/fonts/va9B4kDNxMZdWfMOD5VnZKveRhf6Xl7Glw.woff2va9B4kDNxMZdWfMOD5VnZKv... https://cdn.infoq.com/statics_s1_20260421232814/styles/fonts/va9B4kDNxMZdWfMOD5VnZKveRhf6Xl7Glw.woff2 — 17.9 KiB — 11 ms — font-display: swaphttps://cdn.infoq.com/statics_s1_20260421232814/styles/fonts/va9B4kDNxMZdWfMOD5VnLK3eRhf6Xl7Glw.woff2va9B4kDNxMZdWfMOD5VnLK3... https://cdn.infoq.com/statics_s1_20260421232814/styles/fonts/va9B4kDNxMZdWfMOD5VnLK3eRhf6Xl7Glw.woff2 — 17.9 KiB — 12 ms — font-display: swap
va9B4kDNxMZdWfMOD5VnZKv... woff2 swap
Size 18 KB
Load time 11 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
va9B4kDNxMZdWfMOD5VnLK3... woff2 swap
Size 18 KB
Load time 12 ms
Start 1.1 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
Network Waterfall
94 requests over 2993ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s 64.0 s 66.0 s 68.0 s FCP 61.7 s LCP 65.9 shttps://infoq.com// https://infoq.com/ — 301 — 486 B — 533 ms — h2https://www.infoq.com/www.infoq.com/ https://www.infoq.com/ — 200 — 41.3 KiB — 615 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/styles/style.csscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/styles/style.css — 200 — 969.1 KiB — 144 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/styles/style_en.csscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/styles/style_en.css — 200 — 608 B — 107 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/styles/icons.csscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/styles/icons.css — 200 — 10.0 MiB — 403 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/styles/style_extra.csscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/styles/style_extra.css — 200 — 1.6 KiB — 112 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/styles/fonts/font.csscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/styles/fonts/font.css — 200 — 948 B — 114 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/scripts/combinedJs.min.jscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/scripts/combinedJs.min.js — 200 — 58.4 KiB — 121 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/scripts/relatedVcr.min.jscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/scripts/relatedVcr.min.js — 200 — 5.7 KiB — 118 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/scripts/infoq.jscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/scripts/infoq.js — 200 — 115.4 KiB — 121 ms — h2https://plausible.io/js/script.file-downloads.hash.outbound-links.pageview-props.tagged-events.jsplausible.io/js/script.file-downloa... https://plausible.io/js/script.file-downloads.hash.outbound-links.pageview-props.tagged-events.js — 200 — 2.8 KiB — 34 ms — h2https://www.infoq.com/vendorcontent/loadVcrs.actionwww.infoq.com/vendorcontent/loadVcr... https://www.infoq.com/vendorcontent/loadVcrs.action — 200 — 10.3 KiB — 372 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-W9GJ5DLwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-W9GJ5DL — 200 — 128.7 KiB — 157 ms — h2https://cdn.infoq.com/statics_s1_20260421232814/styles/print.csscdn.infoq.com/statics_s1_2026042123... https://cdn.infoq.com/statics_s1_20260421232814/styles/print.css — 200 — 1.4 KiB — 46 ms — h2data:image/svg+xml,%3csvg height='28' viewBox='0 0 92 28' width='92' xmlns='http://www.w3.org/2000/…www.w3.org/2000/… data:image/svg+xml,%3csvg height='28' viewBox='0 0 92 28' width='92' xmlns='http://www.w3.org/2000/… — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='10' height='7' viewBox='0 0 10 …www.w3.org/2000/svg' width='10' hei... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='10' height='7' viewBox='0 0 10 … — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3csvg fill='none' height='12' viewBox='0 0 12 12' width='12' xmlns='http://www.…www.… data:image/svg+xml,%3csvg fill='none' height='12' viewBox='0 0 12 12' width='12' xmlns='http://www.… — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3csvg height='31' viewBox='0 0 100 31' width='100' xmlns='http://www.w3.org/200…www.w3.org/200… data:image/svg+xml,%3csvg height='31' viewBox='0 0 100 31' width='100' xmlns='http://www.w3.org/200… — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3csvg fill='none' height='12' viewBox='0 0 12 12' width='12' xmlns='http://www.…www.… data:image/svg+xml,%3csvg fill='none' height='12' viewBox='0 0 12 12' width='12' xmlns='http://www.… — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3csvg fill='none' height='12' viewBox='0 0 12 12' width='12' xmlns='http://www.…www.… data:image/svg+xml,%3csvg fill='none' height='12' viewBox='0 0 12 12' width='12' xmlns='http://www.… — 200 — 0 B — 0 ms — datahttps://imgopt.infoq.com/eyJidWNrZXQiOiAiYXNzZXRzLmluZm9xLmNvbSIsImtleSI6ICJ3ZWIvaGVhZGVyL2NvbmZlcmVuY2VzLzIwMjYvT25saW5lQ29ob3J0c01hcmNoMjAyNi10b3AtdjQuanBnIiwiZWRpdHMiOiB7IndlYnAiOiB7ICJxdWFsaXR5Ijo4MH19fQ==imgopt.infoq.com/eyJidWNrZXQiOiAiYX... https://imgopt.infoq.com/eyJidWNrZXQiOiAiYXNzZXRzLmluZm9xLmNvbSIsImtleSI6ICJ3ZWIvaGVhZGVyL2NvbmZlcmVuY2VzLzIwMjYvT25saW5lQ29ob3J0c01hcmNoMjAyNi10b3AtdjQuanBnIiwiZWRpdHMiOiB7IndlYnAiOiB7ICJxdWFsaXR5Ijo4MH19fQ== — 200 — 2.7 KiB — 62 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 17351ms · 1739KB · €188/mo
cdn.infoq.com
Other
Costly
Execution 12822ms
Transfer 58 KB
Unused 58%
Monthly Cost €139/mo
www.infoq.com
Other
Costly
Execution 2920ms
Transfer 41 KB
Monthly Cost €32/mo
Unattributable
Other
Costly
Execution 388ms
Transfer 0 KB
Monthly Cost €4/mo
cc.cdn.civiccomputing.com
Other
Costly
Execution 337ms
Transfer 123 KB
Unused 47%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 225ms
Transfer 159 KB
Unused 42%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 172ms
Transfer 129 KB
Unused 50%
Monthly Cost €2/mo
cdn.infoq.com
Other
Optional
Execution 163ms
Transfer 115 KB
Unused 65%
Monthly Cost €2/mo
Facebook Pixel
Advertising
Optional
Execution 152ms
Transfer 97 KB
Unused 34%
Monthly Cost €2/mo
Facebook Pixel
Advertising
Optional
Execution 115ms
Transfer 47 KB
Monthly Cost €1/mo
cdn.infoq.com
Other
Optional
Execution 57ms
Transfer 969 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • cdn.infoq.com adds 12822ms and costs ~€139/month
  • www.infoq.com adds 2920ms and costs ~€32/month
  • Unattributable adds 388ms and costs ~€4/month
  • cc.cdn.civiccomputing.com adds 337ms and costs ~€4/month
  • Google Tag Manager adds 225ms 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

cdn.infoq.com takes 12822ms 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

58% of cdn.infoq.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.infoq.com takes 2920ms 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 388ms 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

cc.cdn.civiccomputing.com takes 337ms 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 225ms 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

65% of cdn.infoq.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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