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https://recreation.gov

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
66
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.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

2.07 s

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

4.09 s

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

68 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.

2.47 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.

4.85 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
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
5.4 MB transferred, 97 requests
FIX
5.4 MB transferred, 97 requests
Critical::
Page weighs 12.9 MB (5.4 MB transferred)
Warning::
JavaScript is 2.9 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.9 MB
Warning::
Images are 1.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.9 MB
Info::
CSS is 257 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 257 KB
Info::
97 HTTP requests
Info::
Estimated 1.1 g CO2 per page load
5.4 MB / 2.4 MB budget
5.4 MB transferred
97 requests
1.1 g CO2 per page load
JavaScript 2.9 MiB 53%
Images 1.9 MiB 35%
CSS 256.9 KiB 5%
Other 139.0 KiB 3%
Fonts 138.8 KiB 3%
HTML 42.1 KiB 1%
Other 34.9 KiB 1%
Other 3.8 KiB 0%
Other 815 B 0%
Other 551 B 0%
Other 450 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

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 (5.4 MiB of 5.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
27 scripts, 1.7 MB unused
FIX
27 scripts, 1.7 MB unused
Warning::
https://www.recreation.gov/navigation/vendor-C0aOd...: 274 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.recreation.gov/shared/libraries/mapbox...: 254 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.7 MB
1738 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.recreation.gov/navigation/vendor-C0aOdRmL.js429 KB274 KB (65%)✓3rd
https://www.recreation.gov/shared/libraries/mapbox-gl-2.15.0/mapbox-gl.js326 KB254 KB (79%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.recreation.gov/navigation/index-DiropKY0.js196 KB121 KB (63%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-9TNNMGP8WJ&cx=c&gtm=4e64k1155 KB107 KB (69%)✓3rd
https://www.recreation.gov/navigation/sarsaparilla-CtTkDZqa.js151 KB96 KB (65%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-X10C0SX7L7&cx=c&gtm=4e64k1176 KB67 KB (38%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-9TNNMGP8WJ155 KB65 KB (42%)✓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
Page Weight Inventory
Action
97 resources · 5.4 MB · 1.7 MB savings available
FIX
97 resources · 5.4 MB · 1.7 MB savings available
Warning::
Page weight 4.4 MB over 1MB target
Got: 5.4 MB Expected: ≤ 1 MB
Info::
~1.7 MB of savings available
Warning::
96 third-party resources (100% of weight)
Info::
6 resources over 200KB
97 resources · 5.4 MiB · 96 third-party 4.4 MiB over 1MB target
JavaScript 53% · 2.9 MiB
Image 38% · 2.1 MiB
CSS 5% · 256.9 KiB
Font 3% · 138.8 KiB
Document 1% · 42.1 KiB
Other 1% · 40.7 KiB

~1.7 MiB of savings available

Remove unused JavaScript: 1.7 MiB
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
30 images, 0 KB saveable
REVIEW
30 images, 0 KB saveable
Warning::
https://help.recreation.gov/bcb368a5db8906105a5f29... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://help.recreation.gov/30d3090987323690f4bea7... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.recreation.gov/shared/navigation/img/m... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://help.recreation.gov/d9ba062fcf7eb210f3eafe... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.recreation.gov/shared/navigation/img/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.recreation.gov/shared/navigation/img/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
30 images 1.9 MB
0 oversized -0 KB
13 legacy format
6 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

C
JS Execution Cost
Action
1391ms total JS execution
REVIEW
1391ms total JS execution
Warning::
https://www.recreation.gov/navigation/react-C0oLPb...: 309ms CPU time
Info::
Unattributable: 240ms CPU time
Info::
https://www.recreation.gov/: 209ms CPU time
Info::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 178ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-5PH...: 131ms CPU time
Warning::
Third-party scripts: 1391ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Other 20% Style & Layout 11% Script Parsing & Compilation 7% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.recreation.gov/navigation/react-C0oLPbys.js309ms222ms0ms3rd
Unattributable240ms8ms0ms3rd
https://www.recreation.gov/209ms2ms1ms3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js178ms157ms16ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5PH9PJ3&gtm_auth=TTJSuH9rjmpxLfachGPS8g&gtm_preview=env-2&gtm_cookies_win=x131ms114ms14ms3rd
https://www.recreation.gov/navigation/vendor-C0aOdRmL.js115ms56ms1ms3rd
https://www.googletagmanager.com/gtag/js?id=G-X10C0SX7L7&cx=c&gtm=4e64k1100ms88ms11ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-751332302&cx=c&gtm=4e64k157ms48ms8ms3rd
https://www.googletagmanager.com/gtag/js?id=G-9TNNMGP8WJ52ms43ms8ms3rd
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 (139 KB)
PASS
4 fonts (139 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

139 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 FCP 2.1 s LCP 4.1 shttps://www.recreation.gov/shared/fonts/open-sans-300-normal-latin.woff2open-sans-300-normal-la... https://www.recreation.gov/shared/fonts/open-sans-300-normal-latin.woff2 — 45.2 KiB — 8 ms — font-display: swaphttps://www.recreation.gov/shared/fonts/open-sans-300-normal-latin-ext.woff2open-sans-300-normal-la... https://www.recreation.gov/shared/fonts/open-sans-300-normal-latin-ext.woff2 — 33.2 KiB — 8 ms — font-display: swaphttps://www.recreation.gov/shared/fonts/open-sans-300-italic-latin.woff2open-sans-300-italic-la... https://www.recreation.gov/shared/fonts/open-sans-300-italic-latin.woff2 — 47.2 KiB — 10 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v32/KFOmCnqEu92Fr1Mu4mxKKTU1Kg.woff2KFOmCnqEu92Fr1Mu4mxKKTU... https://fonts.gstatic.com/s/roboto/v32/KFOmCnqEu92Fr1Mu4mxKKTU1Kg.woff2 — 13.1 KiB — 41 ms — font-display: swap
open-sans-300-normal-la... woff2 swap
Size 45 KB
Load time 8 ms
Start 333 ms
Risk FOUT — text flashes from fallback to web font
open-sans-300-normal-la... woff2 swap
Size 33 KB
Load time 8 ms
Start 334 ms
Risk FOUT — text flashes from fallback to web font
open-sans-300-italic-la... woff2 swap
Size 47 KB
Load time 10 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
KFOmCnqEu92Fr1Mu4mxKKTU... woff2 swap
Size 13 KB
Load time 41 ms
Start 1.5 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
Network Waterfall
97 requests over 4087ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.1 s LCP 4.1 shttps://recreation.gov// https://recreation.gov/ — 301 — 320 B — 54 ms — h2https://www.recreation.gov/www.recreation.gov/ https://www.recreation.gov/ — 200 — 14.6 KiB — 65 ms — h3https://www.recreation.gov/shared/libraries/mapbox-gl-2.15.0/mapbox-gl.csswww.recreation.gov/shared/libraries... https://www.recreation.gov/shared/libraries/mapbox-gl-2.15.0/mapbox-gl.css — 200 — 8.9 KiB — 8 ms — h3https://www.recreation.gov/shared/libraries/mapbox-gl-2.15.0/mapbox-gl.jswww.recreation.gov/shared/libraries... https://www.recreation.gov/shared/libraries/mapbox-gl-2.15.0/mapbox-gl.js — 200 — 325.7 KiB — 66 ms — h3https://www.recreation.gov/navigation/index-DiropKY0.jswww.recreation.gov/navigation/index... https://www.recreation.gov/navigation/index-DiropKY0.js — 200 — 195.6 KiB — 59 ms — h3https://www.recreation.gov/navigation/react-C0oLPbys.jswww.recreation.gov/navigation/react... https://www.recreation.gov/navigation/react-C0oLPbys.js — 200 — 57.0 KiB — 36 ms — h3https://www.recreation.gov/navigation/lodash-BuNDIQxb.jswww.recreation.gov/navigation/lodas... https://www.recreation.gov/navigation/lodash-BuNDIQxb.js — 200 — 28.5 KiB — 30 ms — h3https://www.recreation.gov/navigation/vendor-C0aOdRmL.jswww.recreation.gov/navigation/vendo... https://www.recreation.gov/navigation/vendor-C0aOdRmL.js — 200 — 429.5 KiB — 65 ms — h3https://www.recreation.gov/navigation/sarsaparilla-CtTkDZqa.jswww.recreation.gov/navigation/sarsa... https://www.recreation.gov/navigation/sarsaparilla-CtTkDZqa.js — 200 — 150.8 KiB — 61 ms — h3https://www.recreation.gov/navigation/sarsaparilla-DF31Ct7t.csswww.recreation.gov/navigation/sarsa... https://www.recreation.gov/navigation/sarsaparilla-DF31Ct7t.css — 200 — 9.1 KiB — 7 ms — h3https://www.recreation.gov/navigation/index-C5nGvBVl.csswww.recreation.gov/navigation/index... https://www.recreation.gov/navigation/index-C5nGvBVl.css — 200 — 191.6 KiB — 41 ms — h3https://help.recreation.gov/30d3090987323690f4bea7d50cbb352d.iixhelp.recreation.gov/30d309098732369... https://help.recreation.gov/30d3090987323690f4bea7d50cbb352d.iix — 200 — 94.1 KiB — 572 ms — http/1.1https://help.recreation.gov/d9ba062fcf7eb210f3eafe152f851c77.iixhelp.recreation.gov/d9ba062fcf7eb21... https://help.recreation.gov/d9ba062fcf7eb210f3eafe152f851c77.iix — 200 — 491.5 KiB — 818 ms — http/1.1data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAQAAAAfQ//73v/+BiOh/AAA=data:image/webp;base64,UklGRh4AAABX... data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAQAAAAfQ//73v/+BiOh/AAA= — 200 — 0 B — 0 ms — datahttps://help.recreation.gov/bcb368a5db8906105a5f298d13961985.iixhelp.recreation.gov/bcb368a5db89061... https://help.recreation.gov/bcb368a5db8906105a5f298d13961985.iix — 200 — 94.2 KiB — 508 ms — http/1.1https://www.recreation.gov/manifest.jsonwww.recreation.gov/manifest.json https://www.recreation.gov/manifest.json — 200 — 815 B — 7 ms — h3https://www.googletagmanager.com/gtm.js?id=GTM-5PH9PJ3&gtm_auth=TTJSuH9rjmpxLfachGPS8g&gtm_preview=env-2&gtm_cookies_win=xwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-5PH9PJ3&gtm_auth=TTJSuH9rjmpxLfachGPS8g&gtm_preview=env-2&gtm_cookies_win=x — 200 — 182.1 KiB — 203 ms — h2data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' vi…www.w3.org/2000/svg' width='12' hei... data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' vi… — 200 — 0 B — 0 ms — datahttps://www.recreation.gov/shared/fonts/open-sans-300-normal-latin.woff2www.recreation.gov/shared/fonts/ope... https://www.recreation.gov/shared/fonts/open-sans-300-normal-latin.woff2 — 200 — 45.2 KiB — 8 ms — h3https://www.recreation.gov/shared/fonts/open-sans-300-normal-latin-ext.woff2www.recreation.gov/shared/fonts/ope... https://www.recreation.gov/shared/fonts/open-sans-300-normal-latin-ext.woff2 — 200 — 33.2 KiB — 8 ms — h3https://app.launchdarkly.com/sdk/goals/588a570044b03e0b32112cfcapp.launchdarkly.com/sdk/goals/588a... https://app.launchdarkly.com/sdk/goals/588a570044b03e0b32112cfc — 200 — 0 B — 9 ms — h2https://app.launchdarkly.com/sdk/evalx/588a570044b03e0b32112cfc/contexts/eyJraW5kIjoidXNlciIsImtleSI6ImJ1Y2tldDEwMF8xNCIsImFub255bW91cyI6dHJ1ZSwidXNlcl9idWNrZXQiOiIxNCIsInVyaSI6Ii8ifQapp.launchdarkly.com/sdk/evalx/588a... https://app.launchdarkly.com/sdk/evalx/588a570044b03e0b32112cfc/contexts/eyJraW5kIjoidXNlciIsImtleSI6ImJ1Y2tldDEwMF8xNCIsImFub255bW91cyI6dHJ1ZSwidXNlcl9idWNrZXQiOiIxNCIsInVyaSI6Ii8ifQ — 200 — 0 B — 8 ms — h2https://app.launchdarkly.com/sdk/evalx/588a570044b03e0b32112cfc/contexts/eyJraW5kIjoidXNlciIsImtleSI6ImJ1Y2tldDEwMF8xNCIsImFub255bW91cyI6dHJ1ZSwidXNlcl9idWNrZXQiOiIxNCIsInVyaSI6Ii8ifQapp.launchdarkly.com/sdk/evalx/588a... https://app.launchdarkly.com/sdk/evalx/588a570044b03e0b32112cfc/contexts/eyJraW5kIjoidXNlciIsImtleSI6ImJ1Y2tldDEwMF8xNCIsImFub255bW91cyI6dHJ1ZSwidXNlcl9idWNrZXQiOiIxNCIsInVyaSI6Ii8ifQ — 200 — 5.8 KiB — 13 ms — h2https://app.launchdarkly.com/sdk/goals/588a570044b03e0b32112cfcapp.launchdarkly.com/sdk/goals/588a... https://app.launchdarkly.com/sdk/goals/588a570044b03e0b32112cfc — 200 — 843 B — 3 ms — h2https://clientstream.launchdarkly.com/eval/588a570044b03e0b32112cfc/eyJraW5kIjoidXNlciIsImtleSI6ImJ1Y2tldDEwMF8xNCIsImFub255bW91cyI6dHJ1ZSwidXNlcl9idWNrZXQiOiIxNCIsInVyaSI6Ii8ifQclientstream.launchdarkly.com/eval/... https://clientstream.launchdarkly.com/eval/588a570044b03e0b32112cfc/eyJraW5kIjoidXNlciIsImtleSI6ImJ1Y2tldDEwMF8xNCIsImFub255bW91cyI6dHJ1ZSwidXNlcl9idWNrZXQiOiIxNCIsInVyaSI6Ii8ifQ — 200 — 450 B — 119 ms — h2https://www.recreation.gov/shared/graphics/icons.svgwww.recreation.gov/shared/graphics/... https://www.recreation.gov/shared/graphics/icons.svg — 200 — 123.2 KiB — 13 ms — 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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 1391ms · 1159KB · €15/mo
www.recreation.gov
Other
Costly
Execution 309ms
Transfer 57 KB
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 240ms
Transfer 0 KB
Monthly Cost €3/mo
www.recreation.gov
Other
Costly
Execution 209ms
Transfer 15 KB
Monthly Cost €2/mo
www.gstatic.com
Other
Optional
Execution 178ms
Transfer 0 KB
Unused 49%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 131ms
Transfer 182 KB
Unused 28%
Monthly Cost €1/mo
www.recreation.gov
Other
Optional
Execution 115ms
Transfer 429 KB
Unused 65%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 100ms
Transfer 176 KB
Unused 38%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 57ms
Transfer 145 KB
Unused 42%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 52ms
Transfer 155 KB
Unused 42%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.recreation.gov adds 309ms and costs ~€3/month
  • Unattributable adds 240ms and costs ~€3/month
  • www.recreation.gov adds 209ms and costs ~€2/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.recreation.gov takes 309ms 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 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

www.recreation.gov takes 209ms 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

65% of www.recreation.gov'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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