Skip to content
https://startpage.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
3
REVIEW
3
PASS
9
INFO
2

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

Mobile Desktop
61
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.

3.04 s

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

3.95 s

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

918 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.

3.04 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.

4.33 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
9 PASS 3 REVIEW 3 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 (297.5 KiB of 297.6 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2424ms total JS execution
FIX
2424ms total JS execution
Warning::
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/16...: 985ms CPU time
Warning::
https://www.startpage.com/: 673ms CPU time
Warning::
Unattributable: 399ms CPU time
Warning::
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/16...: 313ms CPU time
Info::
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/16...: 54ms CPU time
Warning::
Third-party scripts: 2424ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 22% Style & Layout 18% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/deps.js985ms880ms20ms3rd
https://www.startpage.com/673ms17ms3ms3rd
Unattributable399ms10ms0ms3rd
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/lib/AppHome.js313ms205ms63ms3rd
https://cdn.startpage.com/sp/cdn/bundles/0.4.11/160b5ce/runtime.js54ms52ms1ms3rd
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 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/cms_ads.js?v=71vykj470a40 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 33.1 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 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.0 s LCP 3.9 shttps://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 — 6 ms — font-display: swap
UcC73FwrK3iLTeHuS_fvQtM... woff2 swap
Size 38 KB
Load time 6 ms
Start 394 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
12 hints, 0 missing preconnects
PASS
12 hints, 0 missing preconnects
Info::
Page uses 12 resource hint(s)

Current Resource Hints

preconnect
—
preload
+2
12
dns-prefetch
—
prefetch
—

12 resource hints configured

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 · 297.6 KiB · 19 third-party Within 1MB page-weight target
JavaScript 68% · 202.6 KiB
Font 13% · 37.9 KiB
Document 11% · 33.2 KiB
Image 7% · 22.2 KiB
Other 1% · 1.8 KiB

~73.2 KiB of savings available

Remove unused JavaScript: 73.2 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
Network Waterfall
20 requests over 876ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.0 s LCP 3.9 shttps://startpage.com// https://startpage.com/ — 303 — 86 B — 74 ms — h2https://www.startpage.com/www.startpage.com/ https://www.startpage.com/ — 200 — 33.1 KiB — 224 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 — 31 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 — 18 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 — 22 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 — 19 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 — 8 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 — 10 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 — 9 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 — 6 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 — 12 ms — h2https://www.startpage.com/cms_ads.js?v=71vykj470a4www.startpage.com/cms_ads.js?v=71vy... https://www.startpage.com/cms_ads.js?v=71vykj470a4 — 200 — 85 B — 26 ms — h2https://www.startpage.com/clevwww.startpage.com/clev https://www.startpage.com/clev — 204 — 529 B — 183 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 — 11 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 — 9 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 — 6 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=noQdbDQ7TaME00&cdw=0&rpw=0www.startpage.com/sp/footerImage/cd... https://www.startpage.com/sp/footerImage/cdn/images/startpage-logo-gradient.svg?sc=noQdbDQ7TaME00&cdw=0&rpw=0 — 200 — 4.2 KiB — 32 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 — 6 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 2424ms · 236KB · €7/mo
cdn.startpage.com
Other
Costly
Execution 985ms
Transfer 43 KB
Monthly Cost €3/mo
www.startpage.com
Other
Costly
Execution 673ms
Transfer 33 KB
Monthly Cost €2/mo
Unattributable
Other
Costly
Execution 399ms
Transfer 0 KB
Monthly Cost €1/mo
cdn.startpage.com
Other
Costly
Execution 313ms
Transfer 156 KB
Unused 47%
Monthly Cost €1/mo
cdn.startpage.com
Other
Optional
Execution 54ms
Transfer 3 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • cdn.startpage.com adds 985ms and costs ~€3/month
  • www.startpage.com adds 673ms and costs ~€2/month
  • Unattributable adds 399ms and costs ~€1/month
  • cdn.startpage.com adds 313ms 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 985ms 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.startpage.com takes 673ms 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 399ms 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

cdn.startpage.com takes 313ms 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.

Send Feedback