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https://startpage.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
2
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.

810 ms

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

852 ms

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

91 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.

835 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.05 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 4 REVIEW 2 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 (297.4 KiB of 297.5 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Info::
All images are well-optimized
9 images 18 KB
0 oversized -0 KB
9 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
579ms total JS execution
REVIEW
579ms total JS execution
Info::
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/16...: 240ms CPU time
Info::
https://www.startpage.com/: 176ms CPU time
Info::
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/16...: 83ms CPU time
Info::
Unattributable: 79ms CPU time
Warning::
Third-party scripts: 579ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Style & Layout 20% Other 20% Parse HTML & CSS 4% Script Parsing & Compilation 3% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/deps.js240ms210ms4ms3rd
https://www.startpage.com/176ms5ms1ms3rd
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/lib/AppHome.js83ms56ms15ms3rd
Unattributable79ms2ms0ms3rd
B
JS Bundles
4 scripts, 73 KB unused
REVIEW
4 scripts, 73 KB unused
Warning::
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/16...: 73 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 73 KB
73 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/lib/AppHome.js156 KB73 KB (47%)✓3rd
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/deps.js43 KB—✓3rd
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/runtime.js3 KB—✓3rd
https://www.startpage.com/adblock-detector.min.js?v=5pqbodyvqfm0 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
298 KB transferred, 20 requests
PASS
298 KB transferred, 20 requests
Info::
Page weighs 864 KB (298 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.06 g CO2 per page load
298 KB / 2.4 MB budget
298 KB transferred
20 requests
0.06 g CO2 per page load
JavaScript 202.6 KiB 68%
Fonts 37.9 KiB 13%
HTML 33.0 KiB 11%
Images 18.1 KiB 6%
Other 4.1 KiB 1%
Other 1.2 KiB 0%
Other 529 B 0%
0 2.4 MB 4.9 MB
Under budget
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
1 fonts (38 KB)
PASS
1 fonts (38 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

38 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 810 ms LCP 852 mshttps://cdn.startpage.com/sp/cdn/font/Inter/v11/UcC73FwrK3iLTeHuS_fvQtMwCp50KnMa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_fvQtM... https://cdn.startpage.com/sp/cdn/font/Inter/v11/UcC73FwrK3iLTeHuS_fvQtMwCp50KnMa1ZL7W0Q5nw.woff2 — 37.9 KiB — 7 ms — font-display: swap
UcC73FwrK3iLTeHuS_fvQtM... woff2 swap
Size 38 KB
Load time 7 ms
Start 290 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
Page Weight Inventory
20 resources · 298 KB · 73 KB savings available
PASS
20 resources · 298 KB · 73 KB savings available
Info::
Within 1MB page-weight target
Got: 298 KB
Info::
~73 KB of savings available
Warning::
19 third-party resources (100% of weight)
20 resources · 297.5 KiB · 19 third-party Within 1MB page-weight target
JavaScript 68% · 202.6 KiB
Font 13% · 37.9 KiB
Document 11% · 33.1 KiB
Image 7% · 22.2 KiB
Other 1% · 1.8 KiB

~73.2 KiB of savings available

Remove unused JavaScript: 73.2 KiB
Network Waterfall
20 requests over 795ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 810 ms LCP 852 mshttps://startpage.com// https://startpage.com/ — 303 — 86 B — 74 ms — h2https://www.startpage.com/www.startpage.com/ https://www.startpage.com/ — 200 — 33.0 KiB — 161 ms — h2https://cdn.startpage.com/sp/cdn/manifest-gradient.jsoncdn.startpage.com/sp/cdn/manifest-g... https://cdn.startpage.com/sp/cdn/manifest-gradient.json — 200 — 1.2 KiB — 37 ms — h2https://cdn.startpage.com/sp/cdn/images/home/default/down-arrow.svgcdn.startpage.com/sp/cdn/images/hom... https://cdn.startpage.com/sp/cdn/images/home/default/down-arrow.svg — 200 — 1.5 KiB — 16 ms — h2https://cdn.startpage.com/sp/cdn/images/search-icon-blue.svgcdn.startpage.com/sp/cdn/images/sea... https://cdn.startpage.com/sp/cdn/images/search-icon-blue.svg — 200 — 1.1 KiB — 7 ms — h2https://cdn.startpage.com/sp/cdn/images/cog-hover.svgcdn.startpage.com/sp/cdn/images/cog... https://cdn.startpage.com/sp/cdn/images/cog-hover.svg — 200 — 1.4 KiB — 12 ms — h2https://cdn.startpage.com/sp/cdn/images/swoosh/desktop-top-swoosh.svgcdn.startpage.com/sp/cdn/images/swo... https://cdn.startpage.com/sp/cdn/images/swoosh/desktop-top-swoosh.svg — 200 — 1.5 KiB — 14 ms — h2https://cdn.startpage.com/sp/cdn/font/Inter/v11/UcC73FwrK3iLTeHuS_fvQtMwCp50KnMa1ZL7W0Q5nw.woff2cdn.startpage.com/sp/cdn/font/Inter... https://cdn.startpage.com/sp/cdn/font/Inter/v11/UcC73FwrK3iLTeHuS_fvQtMwCp50KnMa1ZL7W0Q5nw.woff2 — 200 — 37.9 KiB — 7 ms — h2https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/deps.jscdn.startpage.com/sp/cdn/bundles/0.... https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/deps.js — 200 — 43.4 KiB — 18 ms — h2https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/runtime.jscdn.startpage.com/sp/cdn/bundles/0.... https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/runtime.js — 200 — 2.6 KiB — 14 ms — h2https://cdn.startpage.com/sp/cdn/images/swoosh/desktop-bottom-swoosh.svgcdn.startpage.com/sp/cdn/images/swo... https://cdn.startpage.com/sp/cdn/images/swoosh/desktop-bottom-swoosh.svg — 200 — 1.4 KiB — 8 ms — h2https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/lib/AppHome.jscdn.startpage.com/sp/cdn/bundles/0.... https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/lib/AppHome.js — 200 — 156.5 KiB — 14 ms — h2https://www.startpage.com/adblock-detector.min.js?v=5pqbodyvqfmwww.startpage.com/adblock-detector.... https://www.startpage.com/adblock-detector.min.js?v=5pqbodyvqfm — 200 — 85 B — 24 ms — h2https://www.startpage.com/clevwww.startpage.com/clev https://www.startpage.com/clev — 204 — 529 B — 159 ms — h2https://cdn.startpage.com/sp/cdn/images/icon-chrome.svgcdn.startpage.com/sp/cdn/images/ico... https://cdn.startpage.com/sp/cdn/images/icon-chrome.svg — 200 — 1.9 KiB — 8 ms — h2https://cdn.startpage.com/sp/cdn/images/startpage-logo-gradient.svgcdn.startpage.com/sp/cdn/images/sta... https://cdn.startpage.com/sp/cdn/images/startpage-logo-gradient.svg — 200 — 4.0 KiB — 8 ms — h2https://cdn.startpage.com/sp/cdn/favicons/favicon-gradient.icocdn.startpage.com/sp/cdn/favicons/f... https://cdn.startpage.com/sp/cdn/favicons/favicon-gradient.ico — 200 — 2.0 KiB — 7 ms — h2https://cdn.startpage.com/sp/cdn/images/new-header-hamburger.svgcdn.startpage.com/sp/cdn/images/new... https://cdn.startpage.com/sp/cdn/images/new-header-hamburger.svg — 200 — 1.2 KiB — 6 ms — h2https://www.startpage.com/sp/footerImage/cdn/images/startpage-logo-gradient.svg?sc=kWkUZRhDvItx00&cdw=0&rpw=0www.startpage.com/sp/footerImage/cd... https://www.startpage.com/sp/footerImage/cdn/images/startpage-logo-gradient.svg?sc=kWkUZRhDvItx00&cdw=0&rpw=0 — 200 — 4.2 KiB — 35 ms — h2https://cdn.startpage.com/sp/cdn/favicons/favicon-32x32-gradient.pngcdn.startpage.com/sp/cdn/favicons/f... https://cdn.startpage.com/sp/cdn/favicons/favicon-32x32-gradient.png — 200 — 2.0 KiB — 7 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 579ms · 233KB · €2/mo
cdn.startpage.com
Other
Costly
Execution 240ms
Transfer 43 KB
Monthly Cost €1/mo
www.startpage.com
Other
Optional
Execution 176ms
Transfer 33 KB
Monthly Cost €1/mo
cdn.startpage.com
Other
Optional
Execution 83ms
Transfer 156 KB
Unused 47%
Monthly Cost €0/mo
Unattributable
Other
Optional
Execution 79ms
Transfer 0 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • cdn.startpage.com adds 240ms 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

cdn.startpage.com takes 240ms 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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