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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
3
REVIEW
5
PASS
7
INFO
2

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

Mobile Desktop
33
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

4.25 s

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

8.66 s

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

262 ms

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

1.709

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

5.02 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.

9.29 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 5 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 (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
83 resources · 1.6 MB · 278 KB savings available
FIX
83 resources · 1.6 MB · 278 KB savings available
Warning::
Page weight 564 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~278 KB of savings available
Warning::
82 third-party resources (100% of weight)
Info::
1 resources over 200KB
83 resources · 1.6 MiB · 82 third-party 563.9 KiB over 1MB target
JavaScript 47% · 751.4 KiB
Image 19% · 308.2 KiB
Media 15% · 235.2 KiB
Font 11% · 181.3 KiB
Other 4% · 64.3 KiB
CSS 2% · 31.5 KiB
Document 1% · 16.0 KiB

~278.0 KiB of savings available

Remove unused JavaScript: 278.0 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.

C
Page Weight Budget
Action
1.6 MB transferred, 83 requests
REVIEW
1.6 MB transferred, 83 requests
Info::
Page weighs 3.7 MB (1.6 MB transferred)
Warning::
JavaScript is 751 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 751 KB
Info::
83 HTTP requests
Info::
Estimated 0.33 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
83 requests
0.33 g CO2 per page load
JavaScript 751.4 KiB 47%
Other 235.2 KiB 15%
Fonts 181.3 KiB 11%
Other 156.0 KiB 10%
Images 152.3 KiB 10%
Other 63.1 KiB 4%
CSS 31.5 KiB 2%
HTML 15.3 KiB 1%
Other 1015 B 0%
Other 887 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

C
Image Optimization
Action
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Warning::
https://static.tinkercad.com/nav/store/en.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static.tinkercad.com/images/tinkercad-lock... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11 images 152 KB
0 oversized -0 KB
11 legacy format
2 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

C
JS Execution Cost
Action
1782ms total JS execution
REVIEW
1782ms total JS execution
Warning::
https://www.tinkercad.com/assets_fe_2200edbba71b52...: 833ms CPU time
Warning::
Unattributable: 522ms CPU time
Warning::
https://www.tinkercad.com/: 283ms CPU time
Info::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 143ms CPU time
Warning::
Third-party scripts: 1782ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 29% Style & Layout 11% Script Parsing & Compilation 5% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/polyfills.js833ms643ms0ms3rd
Unattributable522ms162ms0ms3rd
https://www.tinkercad.com/283ms8ms2ms3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js143ms76ms67ms3rd
C
JS Bundles
Action
37 scripts, 278 KB unused
REVIEW
37 scripts, 278 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 242 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.tinkercad.com/assets_fe_2200edbba71b52...: 36 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 278 KB
278 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB242 KB (67%)✓3rd
https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-EJFAWJXN.js111 KB36 KB (33%)✓3rd
https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-U22C4QMU.js2 KB—✓3rd
https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-XWWGPSV7.js1 KB—✓3rd
https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/polyfills.js13 KB—✓3rd
https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/main.js55 KB—✓3rd
https://editor.tinkercad.com/assets_v2_gogqlt/js/nativeBridgeBundle.js3 KB—✓3rd
https://www.tinkercad.com/script.js2 KB—✓3rd
https://kidsafe.com/js/seals/seals.js1 KB—✓3rd
https://www.tinkercad.com/js/webgl_check.js2 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

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
4 fonts (181 KB)
PASS
4 fonts (181 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

181 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 4.2 s LCP 8.7 shttps://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktElementRegular.woff2ArtifaktElementRegular.... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktElementRegular.woff2 — 43.0 KiB — 22 ms — font-display: swaphttps://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktElementBold.woff2ArtifaktElementBold.woff2 https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktElementBold.woff2 — 43.5 KiB — 23 ms — font-display: swaphttps://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktLegendExtraBold.woff2ArtifaktLegendExtraBold... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktLegendExtraBold.woff2 — 48.5 KiB — 19 ms — font-display: swaphttps://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktLegendRegular.woff2ArtifaktLegendRegular.w... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktLegendRegular.woff2 — 46.2 KiB — 21 ms — font-display: swap
ArtifaktElementRegular.... woff2 swap
Size 43 KB
Load time 22 ms
Start 678 ms
Risk FOUT — text flashes from fallback to web font
ArtifaktElementBold.woff2 woff2 swap
Size 44 KB
Load time 23 ms
Start 888 ms
Risk FOUT — text flashes from fallback to web font
ArtifaktLegendExtraBold... woff2 swap
Size 49 KB
Load time 19 ms
Start 921 ms
Risk FOUT — text flashes from fallback to web font
ArtifaktLegendRegular.w... woff2 swap
Size 46 KB
Load time 21 ms
Start 1.3 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
83 requests over 3208ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 4.2 s LCP 8.7 shttps://tinkercad.com// https://tinkercad.com/ — 301 — 86 B — 295 ms — h2https://www.tinkercad.com/www.tinkercad.com/ https://www.tinkercad.com/ — 200 — 4.2 KiB — 196 ms — h2https://www.tinkercad.com/font-awesome.min.csswww.tinkercad.com/font-awesome.min.... https://www.tinkercad.com/font-awesome.min.css — 200 — 6.7 KiB — 25 ms — h2https://www.recaptcha.net/recaptcha/api.jswww.recaptcha.net/recaptcha/api.js https://www.recaptcha.net/recaptcha/api.js — 200 — 1.6 KiB — 147 ms — h2https://www.tinkercad.com/js/webgl_utils.jswww.tinkercad.com/js/webgl_utils.js https://www.tinkercad.com/js/webgl_utils.js — 200 — 2.6 KiB — 26 ms — h2https://www.tinkercad.com/js/webgl_check.jswww.tinkercad.com/js/webgl_check.js https://www.tinkercad.com/js/webgl_check.js — 200 — 1.9 KiB — 30 ms — h2https://editor.tinkercad.com/assets_v2_gogqlt/js/featureFlagsBundle.jseditor.tinkercad.com/assets_v2_gogq... https://editor.tinkercad.com/assets_v2_gogqlt/js/featureFlagsBundle.js — 200 — 29.7 KiB — 154 ms — http/1.1https://www.tinkercad.com/bootstrap.min.csswww.tinkercad.com/bootstrap.min.css https://www.tinkercad.com/bootstrap.min.css — 200 — 19.1 KiB — 31 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/styles.css?v=2025www.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/styles.css?v=2025 — 200 — 5.8 KiB — 26 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/polyfills.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/polyfills.js — 200 — 12.7 KiB — 38 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/main.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/main.js — 200 — 54.5 KiB — 46 ms — h2https://editor.tinkercad.com/assets_v2_gogqlt/js/nativeBridgeBundle.jseditor.tinkercad.com/assets_v2_gogq... https://editor.tinkercad.com/assets_v2_gogqlt/js/nativeBridgeBundle.js — 200 — 3.4 KiB — 151 ms — http/1.1https://www.tinkercad.com/manifest.jsonwww.tinkercad.com/manifest.json https://www.tinkercad.com/manifest.json — 200 — 887 B — 53 ms — h2https://www.tinkercad.com/script.jswww.tinkercad.com/script.js https://www.tinkercad.com/script.js — 200 — 2.0 KiB — 18 ms — h2https://kidsafe.com/js/seals/seals.jskidsafe.com/js/seals/seals.js https://kidsafe.com/js/seals/seals.js — 200 — 1.1 KiB — 111 ms — h2https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 362.4 KiB — 227 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktElementRegular.woff2www.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktElementRegular.woff2 — 200 — 43.0 KiB — 22 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-TB5MR6SE.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-TB5MR6SE.js — 200 — 2.9 KiB — 27 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-5Q5MEEHW.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-5Q5MEEHW.js — 200 — 1.3 KiB — 25 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-4KCAPGSS.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-4KCAPGSS.js — 200 — 5.7 KiB — 29 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-5HOVJ5GY.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-5HOVJ5GY.js — 200 — 496 B — 24 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-23UT7S5G.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-23UT7S5G.js — 200 — 570 B — 27 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-23SOOQI2.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-23SOOQI2.js — 200 — 7.0 KiB — 32 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-YUBCHGCB.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-YUBCHGCB.js — 200 — 3.0 KiB — 29 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-OBDEYUFY.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-OBDEYUFY.js — 200 — 3.4 KiB — 33 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-U22C4QMU.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-U22C4QMU.js — 200 — 2.4 KiB — 41 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-XWWGPSV7.jswww.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/chunk-XWWGPSV7.js — 200 — 933 B — 29 ms — 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h2https://www.tinkercad.com/img/app_icon_192.pngwww.tinkercad.com/img/app_icon_192.... https://www.tinkercad.com/img/app_icon_192.png — 200 — 15.5 KiB — 24 ms — h2https://kidsafe.com/api/seals/93CG7tzZ8CQJaoRlMw1Y6LziUp63e2OwNtqhyEqMkidsafe.com/api/seals/93CG7tzZ8CQJa... https://kidsafe.com/api/seals/93CG7tzZ8CQJaoRlMw1Y6LziUp63e2OwNtqhyEqM — 200 — 702 B — 282 ms — h2https://static.tinkercad.com/marketing/home/hero-home-poster-airplane_w928.jpgstatic.tinkercad.com/marketing/home... https://static.tinkercad.com/marketing/home/hero-home-poster-airplane_w928.jpg — 200 — 21.0 KiB — 21 ms — h2https://static.tinkercad.com/marketing/home/home-3d-poster_w600.jpgstatic.tinkercad.com/marketing/home... https://static.tinkercad.com/marketing/home/home-3d-poster_w600.jpg — 200 — 17.5 KiB — 28 ms — h2https://static.tinkercad.com/marketing/circuits/design-poster_w600.jpgstatic.tinkercad.com/marketing/circ... https://static.tinkercad.com/marketing/circuits/design-poster_w600.jpg — 200 — 12.3 KiB — 28 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https://static.tinkercad.com/images/tinkercad-lockup-white.svg — 200 — 2.6 KiB — 25 ms — h2https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktLegendRegular.woff2www.tinkercad.com/assets_fe_2200edb... https://www.tinkercad.com/assets_fe_2200edbba71b52816a12975ae2f05b1895859de5/js/tinkercad-frontend/browser/media/ArtifaktLegendRegular.woff2 — 200 — 46.2 KiB — 21 ms — h2https://static.tinkercad.com/marketing/home/hero-home-720.mp4static.tinkercad.com/marketing/home... https://static.tinkercad.com/marketing/home/hero-home-720.mp4 — 206 — 188.7 KiB — 44 ms — h2https://static.tinkercad.com/marketing/home/home-3d.mp4static.tinkercad.com/marketing/home... https://static.tinkercad.com/marketing/home/home-3d.mp4 — 206 — 464 B — 69 ms — h2https://static.tinkercad.com/marketing/circuits/design-600.mp4static.tinkercad.com/marketing/circ... https://static.tinkercad.com/marketing/circuits/design-600.mp4 — 206 — 461 B — 73 ms — h2https://static.tinkercad.com/marketing/codeblocks/dragdrop.mp4static.tinkercad.com/marketing/code... https://static.tinkercad.com/marketing/codeblocks/dragdrop.mp4 — 206 — 24.5 KiB — 104 ms — h2https://events.launchdarkly.com/events/diagnostic/5d407e1b44690006c0951bb7events.launchdarkly.com/events/diag... https://events.launchdarkly.com/events/diagnostic/5d407e1b44690006c0951bb7 — 202 — 358 B — 106 ms — h2https://static.tinkercad.com/marketing/circuits/design-600.mp4static.tinkercad.com/marketing/circ... https://static.tinkercad.com/marketing/circuits/design-600.mp4 — 206 — 21.1 KiB — 101 ms — h2https://kidsafe.com/api/seals/93CG7tzZ8CQJaoRlMw1Y6LziUp63e2OwNtqhyEqM/seal/6/imagekidsafe.com/api/seals/93CG7tzZ8CQJa... https://kidsafe.com/api/seals/93CG7tzZ8CQJaoRlMw1Y6LziUp63e2OwNtqhyEqM/seal/6/image — 200 — 5.9 KiB — 806 ms — h2https://kidsafe.com/api/seals/93CG7tzZ8CQJaoRlMw1Y6LziUp63e2OwNtqhyEqM/seal/4/imagekidsafe.com/api/seals/93CG7tzZ8CQJa... https://kidsafe.com/api/seals/93CG7tzZ8CQJaoRlMw1Y6LziUp63e2OwNtqhyEqM/seal/4/image — 200 — 5.2 KiB — 817 ms — h2https://static.tinkercad.com/marketing/circuits/design-600.mp4static.tinkercad.com/marketing/circ... https://static.tinkercad.com/marketing/circuits/design-600.mp4 — 206 — 0 B — 24 ms — h2https://events.launchdarkly.com/events/bulk/5d407e1b44690006c0951bb7events.launchdarkly.com/events/bulk... https://events.launchdarkly.com/events/bulk/5d407e1b44690006c0951bb7 — 204 — 0 B — 103 ms — h2https://events.launchdarkly.com/events/bulk/5d407e1b44690006c0951bb7events.launchdarkly.com/events/bulk... https://events.launchdarkly.com/events/bulk/5d407e1b44690006c0951bb7 — 202 — 358 B — 104 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 1782ms · 379KB · $24/mo
www.tinkercad.com
Other
Costly
Execution 833ms
Transfer 13 KB
Monthly Cost $11/mo
Unattributable
Other
Costly
Execution 522ms
Transfer 0 KB
Monthly Cost $7/mo
www.tinkercad.com
Other
Costly
Execution 283ms
Transfer 4 KB
Monthly Cost $4/mo
www.gstatic.com
Other
Optional
Execution 143ms
Transfer 362 KB
Unused 67%
Monthly Cost $2/mo

These scripts may cost more than they're worth

  • www.tinkercad.com adds 833ms and costs ~$11/month
  • Unattributable adds 522ms and costs ~$7/month
  • www.tinkercad.com adds 283ms and costs ~$4/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

www.tinkercad.com takes 833ms 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 522ms 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.tinkercad.com takes 283ms 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

67% of www.gstatic.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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