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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
2
REVIEW
3
PASS
7
INFO
3

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

Mobile Desktop
92
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.
81
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.

695 ms

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

1.15 s

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

161 ms

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

0.080

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

1.05 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.

2.51 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
15
7 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
76% third-party, 0 ms blocking
FIX
76% third-party, 0 ms blocking
Warning::
Third-party code accounts for 76% of page weight (1.4 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
24%
76%
First-party Third-party
F
JS Bundles
Action
28 scripts, 657 KB unused
FIX
28 scripts, 657 KB unused
Warning::
https://cdn.snigelweb.com/prebid/9.43.0/prebid.js?...: 149 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 128 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fundingchoicesmessages.google.com/i/221527...: 65 KB unused (95%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-XLBG...: 64 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://c.amazon-adsystem.com/aax2/apstag.js: 50 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 657 KB
657 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.snigelweb.com/prebid/9.43.0/prebid.js?v=18266-1774866111347197 KB149 KB (76%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js182 KB128 KB (70%)✓3rd
https://fundingchoicesmessages.google.com/i/22152718?ers=369 KB65 KB (95%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-XLBGPKWB3N172 KB64 KB (37%)✓3rd
https://c.amazon-adsystem.com/aax2/apstag.js90 KB50 KB (55%)✓3rd
https://cdn.snigelweb.com/intentiq/IIQAgent.js46 KB39 KB (86%)✓3rd
https://adengine.snigelweb.com/notebookcheck.net/18266-1774866111347/adngin.js66 KB36 KB (55%)✓3rd
https://fundingchoicesmessages.google.com/i/pub-9885689965057708?ers=170 KB35 KB (51%)✓3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js54 KB34 KB (63%)✓3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js0 KB34 KB (63%)✓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

C
Page Weight Budget
Action
1.8 MB transferred, 111 requests
REVIEW
1.8 MB transferred, 111 requests
Info::
Page weighs 5.5 MB (1.8 MB transferred)
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Warning::
111 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
111 requests
0.38 g CO2 per page load
JavaScript 1.1 MiB 63%
Images 365.1 KiB 20%
Other 110.1 KiB 6%
Other 87.8 KiB 5%
HTML 47.1 KiB 3%
Fonts 38.9 KiB 2%
Other 26.3 KiB 1%
CSS 7.0 KiB 0%
Other 1.1 KiB 0%
Other 562 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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

B
Image Optimization
51 images, 0 KB saveable
REVIEW
51 images, 0 KB saveable
Warning::
https://www.notebookcheck.net/fileadmin/templates/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
51 images 365 KB
0 oversized -0 KB
24 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 Execution Cost
Action
1984ms total JS execution
REVIEW
1984ms total JS execution
Warning::
https://www.notebookcheck.net/: 633ms CPU time
Warning::
Unattributable: 299ms CPU time
Info::
https://securepubads.g.doubleclick.net/pagead/mana...: 141ms CPU time
Info::
https://www.notebookcheck.net/cdn-cgi/challenge-pl...: 137ms CPU time
Info::
https://cdn.snigelweb.com/prebid/9.43.0/prebid.js?...: 121ms CPU time
Warning::
Third-party scripts: 1214ms (61% of total)

Main Thread Breakdown

Script Evaluation 52% Other 17% Style & Layout 16% Script Parsing & Compilation 9% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.notebookcheck.net/633ms99ms15ms1st
Unattributable299ms19ms0ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js141ms111ms23ms3rd
https://www.notebookcheck.net/cdn-cgi/challenge-platform/scripts/jsd/main.js137ms132ms1ms1st
https://cdn.snigelweb.com/prebid/9.43.0/prebid.js?v=18266-1774866111347121ms95ms25ms3rd
https://fundingchoicesmessages.google.com/i/pub-9885689965057708?ers=198ms69ms18ms3rd
https://www.googletagmanager.com/gtag/js?id=G-XLBGPKWB3N96ms73ms22ms3rd
https://c.amazon-adsystem.com/aax2/apstag.js94ms74ms14ms3rd
https://adengine.snigelweb.com/notebookcheck.net/18266-1774866111347/adngin.js93ms83ms9ms3rd
https://config.aps.amazon-adsystem.com/configs/392779ms57ms3ms3rd

Showing top 10 of 13 scripts

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 (39 KB)
PASS
2 fonts (39 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

39 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 500 ms 1.0 s FCP 695 ms LCP 1.1 shttps://cdn.snigelweb.com/resources/fonts/roboto-bold-webfont.woff2roboto-bold-webfont.woff2 https://cdn.snigelweb.com/resources/fonts/roboto-bold-webfont.woff2 — 19.5 KiB — 0 ms — font-display: swaphttps://cdn.snigelweb.com/resources/fonts/roboto-regular-webfont.woff2roboto-regular-webfont.... https://cdn.snigelweb.com/resources/fonts/roboto-regular-webfont.woff2 — 19.3 KiB — 0 ms — font-display: swap
roboto-bold-webfont.woff2 woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
roboto-regular-webfont.... woff2 swap
Size 19 KB
Load time 0 ms
Start 0 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)
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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

A+
HTTP Caching
max-age=1800 (30 minutes)
PASS
max-age=1800 (30 minutes)
Info::
Cache-Control header is set
Got: max-age=1800
Info::
Effective TTL: 30 minutes (max-age=1800)
Info::
Last-Modified header present
Cache-Control

max-age=1800

DirectiveValueMeaning
max-age1800Cache for 30 minutes
Effective TTL: 1800 seconds
Network Waterfall
111 requests over 0ms
INFO

Performance analysis not available for this result.

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 1214ms · 855KB · €4/mo
Unattributable
Other
Costly
Execution 299ms
Transfer 0 KB
Monthly Cost €1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 141ms
Transfer 182 KB
Unused 70%
Monthly Cost €0/mo
cdn.snigelweb.com
Other
Optional
Execution 121ms
Transfer 197 KB
Unused 76%
Monthly Cost €0/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 98ms
Transfer 70 KB
Unused 51%
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 96ms
Transfer 172 KB
Unused 37%
Monthly Cost €0/mo
c.amazon-adsystem.com
Other
Optional
Execution 94ms
Transfer 90 KB
Unused 55%
Monthly Cost €0/mo
adengine.snigelweb.com
Other
Optional
Execution 93ms
Transfer 66 KB
Unused 55%
Monthly Cost €0/mo
config.aps.amazon-adsystem.com
Other
Optional
Execution 79ms
Transfer 7 KB
Monthly Cost €0/mo
html-load.com
Other
Optional
Execution 71ms
Transfer 47 KB
Monthly Cost €0/mo
cdn.snigelweb.com
Other
Optional
Execution 70ms
Transfer 14 KB
Monthly Cost €0/mo
cdn.snigelweb.com
Other
Optional
Execution 51ms
Transfer 11 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 299ms 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 299ms 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

70% of securepubads.g.doubleclick.net'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

76% of cdn.snigelweb.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

51% of fundingchoicesmessages.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

55% of c.amazon-adsystem.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

55% of adengine.snigelweb.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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-03-07 — 2026-04-03)

LCP (p75)

924 ms

95% good

INP (p75)

63 ms

96% good

CLS (p75)

0.000

97% good

FCP (p75)

682 ms

TTFB (p75)

321 ms

This origin passes Core Web Vitals assessment
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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