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https://openclipart.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
50
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.
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.

7.86 s

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

28.39 s

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

319 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.

7.86 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.

28.95 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
8 PASS 4 REVIEW 3 FIX
F
Page Weight Budget
Action
5.8 MB transferred, 59 requests
FIX
5.8 MB transferred, 59 requests
Critical::
Page weighs 7.7 MB (5.8 MB transferred)
Warning::
Images are 4.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.9 MB
Warning::
JavaScript is 736 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 736 KB
Info::
59 HTTP requests
Info::
Estimated 1.2 g CO2 per page load
5.8 MB / 2.4 MB budget
5.8 MB transferred
59 requests
1.2 g CO2 per page load
Images 4.9 MiB 85%
JavaScript 736.4 KiB 12%
Fonts 93.5 KiB 2%
CSS 41.2 KiB 1%
HTML 4.2 KiB 0%
Other 2.3 KiB 0%
Other 1.0 KiB 0%
Other 549 B 0%
Other 168 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

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
JS Bundles
Action
9 scripts, 336 KB unused
FIX
9 scripts, 336 KB unused
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 148 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-QLBW...: 67 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-790...: 64 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fundingchoicesmessages.google.com/i/ca-pub...: 36 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://openclipart.org/vendor/twbs/bootstrap/dist...: 21 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 336 KB
336 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604170101/show_ads_impl_fy2021.js?bust=31097971178 KB148 KB (83%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-QLBW7R5K54&cx=c&gtm=4e64k1165 KB67 KB (41%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-7908533-1125 KB64 KB (51%)✓3rd
https://fundingchoicesmessages.google.com/i/ca-pub-0352842915813820?href=https%3A%2F%2Fopenclipart.org&ers=270 KB36 KB (52%)✓3rd
https://openclipart.org/vendor/twbs/bootstrap/dist/js/bootstrap.bundle.min.js27 KB21 KB (79%)✓1st
https://openclipart.org/vendor/components/jquery/jquery.slim.min.js28 KB—✓1st
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js54 KB—✓3rd
https://www.google-analytics.com/analytics.js21 KB—✓3rd
https://fundingchoicesmessages.google.com/f/AGSKWxW0lPXBqT59Bb7_6C1yAS0zL--si1-tpAHyuEyjPsm0vWK5yDmxmMAGhlAnyqLQ5WStFvca2f2_a-U7JsX6faQ6ic3Otib7Jt_1yo6z-H7GjnCIdWfAmJBwGunyxSwUforGWombTQ==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODk4MTI2LDc1OTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly9vcGVuY2xpcGFydC5vcmcvIixudWxsLFtbOCwicFNKa28xOTZJSDAiXSxbOSwiZW4tVVMiXSxbMTgsIltbW251bGwsMTI3N11dXSJdLFszNSwiMTc3Njg5ODEyNiJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksInRydWUiXV1d68 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

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.

C
Image Optimization
Action
33 images, 0 KB saveable
REVIEW
33 images, 0 KB saveable
Warning::
https://openclipart.org/image/800px/355491 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355480 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/assets/images/openclipart-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355502 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355500 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355499 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355496 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355489 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355497 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355473 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355472 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355492 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355482 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355476 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355501 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355487 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355486 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355484 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355483 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355479 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355478 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355477 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355474 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355493 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355488 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355485 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355475 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355495 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355494 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355490 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355481 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355471 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://openclipart.org/image/800px/355498 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
33 images 4.9 MB
0 oversized -0 KB
33 legacy format
33 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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
1750ms total JS execution
REVIEW
1750ms total JS execution
Warning::
Unattributable: 398ms CPU time
Warning::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 257ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-QLBW...: 223ms CPU time
Info::
https://fundingchoicesmessages.google.com/i/ca-pub...: 186ms CPU time
Info::
https://openclipart.org/: 178ms CPU time
Warning::
Third-party scripts: 1453ms (83% of total)

Main Thread Breakdown

Script Evaluation 48% Other 25% Script Parsing & Compilation 11% Style & Layout 10% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
Unattributable398ms7ms0ms3rd
https://fundingchoicesmessages.google.com/f/AGSKWxW0lPXBqT59Bb7_6C1yAS0zL--si1-tpAHyuEyjPsm0vWK5yDmxmMAGhlAnyqLQ5WStFvca2f2_a-U7JsX6faQ6ic3Otib7Jt_1yo6z-H7GjnCIdWfAmJBwGunyxSwUforGWombTQ==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODk4MTI2LDc1OTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly9vcGVuY2xpcGFydC5vcmcvIixudWxsLFtbOCwicFNKa28xOTZJSDAiXSxbOSwiZW4tVVMiXSxbMTgsIltbW251bGwsMTI3N11dXSJdLFszNSwiMTc3Njg5ODEyNiJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksInRydWUiXV1d257ms116ms35ms3rd
https://www.googletagmanager.com/gtag/js?id=G-QLBW7R5K54&cx=c&gtm=4e64k1223ms182ms40ms3rd
https://fundingchoicesmessages.google.com/i/ca-pub-0352842915813820?href=https%3A%2F%2Fopenclipart.org&ers=2186ms165ms18ms3rd
https://openclipart.org/178ms25ms1ms1st
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604170101/show_ads_impl_fy2021.js?bust=31097971139ms98ms40ms3rd
https://www.googletagmanager.com/gtag/js?id=UA-7908533-1122ms95ms26ms3rd
https://openclipart.org/vendor/components/jquery/jquery.slim.min.js119ms62ms8ms1st
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js75ms53ms13ms3rd
https://www.google-analytics.com/analytics.js53ms46ms5ms3rd
C
Page Weight Inventory
Action
59 resources · 5.8 MB · 336 KB savings available
REVIEW
59 resources · 5.8 MB · 336 KB savings available
Warning::
Page weight 4.8 MB over 1MB target
Got: 5.8 MB Expected: ≤ 1 MB
Info::
~336 KB of savings available
Info::
19 third-party resources (13% of weight)
Info::
6 resources over 200KB
59 resources · 5.8 MiB · 19 third-party 4.8 MiB over 1MB target
Image 85% · 4.9 MiB
JavaScript 12% · 736.4 KiB
Font 2% · 93.5 KiB
CSS 1% · 41.2 KiB
Document 0% · 4.3 KiB
Other 0% · 1.6 KiB

~335.9 KiB of savings available

Remove unused JavaScript: 335.9 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
13% third-party, 0 ms blocking
PASS
13% third-party, 0 ms blocking
Info::
Third-party code accounts for 13% of page weight (781.7 KiB of 5.8 MiB)
Info::
Third-party blocking time is low (0 ms)
87%
First-party Third-party
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
4 fonts (94 KB)
PASS
4 fonts (94 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

94 KB total

Render-blocking

0

of 4

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 FCP 7.9 s LCP 28.4 shttps://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.1 KiB — 122 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 0 B — 122 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2KFOMCnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2 — 14.8 KiB — 100 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 31 ms — font-display: swap
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 122 ms
Start 1.7 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 0 KB
Load time 122 ms
Start 1.7 s
Risk FOUT — text flashes from fallback to web font
KFOMCnqEu92Fr1ME7kSn66a... woff2 swap
Size 15 KB
Load time 100 ms
Start 1.7 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 31 ms
Start 1.8 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
59 requests over 1843ms
INFO
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h3https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2fonts.gstatic.com/s/opensans/v40/me... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 200 — 42.1 KiB — 122 ms — h3https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2fonts.gstatic.com/s/opensans/v40/me... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 200 — 0 B — 122 ms — h3https://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2fonts.gstatic.com/s/roboto/v48/KFOM... https://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2 — 200 — 14.8 KiB — 100 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 36.7 KiB — 31 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
83% of JavaScript execution is third-party
First-party Third-party 1453ms · 681KB · €23/mo
Unattributable
Other
Costly
Execution 398ms
Transfer 0 KB
Monthly Cost €6/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 257ms
Transfer 68 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 223ms
Transfer 165 KB
Unused 41%
Monthly Cost €4/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 186ms
Transfer 70 KB
Unused 52%
Monthly Cost €3/mo
pagead2.googlesyndication.com
Other
Optional
Execution 139ms
Transfer 178 KB
Unused 83%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 122ms
Transfer 125 KB
Unused 51%
Monthly Cost €2/mo
pagead2.googlesyndication.com
Other
Optional
Execution 75ms
Transfer 54 KB
Monthly Cost €1/mo
Google Analytics
Analytics
Optional
Execution 53ms
Transfer 21 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 398ms and costs ~€6/month
  • fundingchoicesmessages.google.com adds 257ms and costs ~€4/month
  • Google Tag Manager adds 223ms and costs ~€4/month

83% 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

Unattributable takes 398ms 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

fundingchoicesmessages.google.com takes 257ms 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 223ms 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

52% 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

83% of pagead2.googlesyndication.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 Google Tag Manager'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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