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https://virginia.gov

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
38
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
98
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.
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.

3.34 s

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

11.01 s

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

312 ms

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

0.427

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

5.49 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.

11.01 s

Page Load Progression

401 ms
802 ms
1.2 s
1.6 s
2.0 s
2.4 s
2.8 s
3.2 s
Checks
17
8 PASS 3 REVIEW 4 FIX
D
Page Weight Budget
Action
2.5 MB transferred, 40 requests
FIX
2.5 MB transferred, 40 requests
Warning::
Page weighs 3.9 MB (2.5 MB transferred)
Warning::
Images are 1.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.8 MB
Info::
40 HTTP requests
Info::
Estimated 0.52 g CO2 per page load
2.5 MB / 2.4 MB budget
2.5 MB transferred
40 requests
0.52 g CO2 per page load
Images 1.8 MiB 74%
JavaScript 441.6 KiB 17%
Fonts 152.0 KiB 6%
CSS 62.7 KiB 2%
HTML 13.5 KiB 1%
Other 1.9 KiB 0%
Other 1.4 KiB 0%
Other 1.1 KiB 0%
Other 550 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

D
JS Execution Cost
Action
2258ms total JS execution
FIX
2258ms total JS execution
Warning::
https://www.virginia.gov/: 1178ms CPU time
Warning::
Unattributable: 431ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-0DWM...: 332ms CPU time
Info::
https://www.developer.virginia.gov/media/developer...: 175ms CPU time
Info::
https://www.virginia.gov/media/vagov/assets/js/jqu...: 88ms CPU time
Info::
Third-party scripts: 938ms (42% of total)

Main Thread Breakdown

Style & Layout 37% Other 21% Script Evaluation 17% Script Parsing & Compilation 9% Rendering 9% Parse HTML & CSS 6%
ScriptTotalScriptingParse/CompileParty
https://www.virginia.gov/1178ms10ms6ms1st
Unattributable431ms10ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-0DWMH7VB6G332ms263ms63ms3rd
https://www.developer.virginia.gov/media/developer/resources/branding-bar/brandingbar.js175ms37ms96ms3rd
https://www.virginia.gov/media/vagov/assets/js/jquery-3.5.1.js88ms43ms41ms1st
https://www.virginia.gov/media/vagov/assets/js/common.js55ms19ms7ms1st
D
JS Bundles
Action
6 scripts, 290 KB unused
FIX
6 scripts, 290 KB unused
Warning::
https://www.developer.virginia.gov/media/developer...: 166 KB unused (84%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-0DWM...: 63 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.virginia.gov/media/vagov/assets/js/jqu...: 61 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.virginia.gov/media/vagov/assets/js/jqu...: unminified — 42 KB could be saved
Info::
Total unused JavaScript: 290 KB
290 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.developer.virginia.gov/media/developer/resources/branding-bar/brandingbar.js197 KB166 KB (84%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-0DWMH7VB6G146 KB63 KB (43%)✓3rd
https://www.virginia.gov/media/vagov/assets/js/jquery-3.5.1.js83 KB61 KB (74%)✗1st
https://mfpembedcdnwus2.azureedge.net/mfpembedcontwus2/Embed.js2 KB—✓3rd
https://www.virginia.gov/media/vagov/assets/js/common.js11 KB—✓1st
https://www.virginia.gov/media/vagov/assets/js/home.js2 KB—✓1st

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

D
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.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Warning::
https://www.virginia.gov/media/vagov/images/news/n... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.virginia.gov/media/vagov/images/news/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.virginia.gov/media/vagov/images/season... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.virginia.gov/media/vagov/images/govern... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.virginia.gov/media/vagov/assets/ico/ca... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.developer.virginia.gov/media/developer... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.virginia.gov/media/vagov/images/season... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.virginia.gov/media/vagov/images/season... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.virginia.gov/media/vagov/images/ltgove... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.virginia.gov/media/vagov/images/ag75_p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19 images 1.8 MB
0 oversized -0 KB
18 legacy format
10 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

C
Page Weight Inventory
Action
40 resources · 2.5 MB · 290 KB savings available
REVIEW
40 resources · 2.5 MB · 290 KB savings available
Warning::
Page weight 1.5 MB over 1MB target
Got: 2.5 MB Expected: ≤ 1 MB
Info::
~290 KB of savings available
Info::
18 third-party resources (22% of weight)
Info::
3 resources over 200KB
40 resources · 2.5 MiB · 18 third-party 1.5 MiB over 1MB target
Image 74% · 1.8 MiB
JavaScript 17% · 441.6 KiB
Font 6% · 152.0 KiB
CSS 2% · 62.7 KiB
Document 1% · 13.5 KiB
Other 0% · 3.5 KiB

~290.2 KiB of savings available

Remove unused JavaScript: 290.2 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
22% third-party, 0 ms blocking
PASS
22% third-party, 0 ms blocking
Info::
Third-party code accounts for 22% of page weight (561.6 KiB of 2.5 MiB)
Info::
Third-party blocking time is low (0 ms)
78%
22%
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
2 fonts (152 KB)
PASS
2 fonts (152 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

152 KB total

Render-blocking

0

of 2

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 FCP 3.3 s LCP 11.0 shttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-brands-400.woff2 — 115.3 KiB — 23 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 6 ms — font-display: swap
fa-brands-400.woff2 woff2 swap
Size 115 KB
Load time 23 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 6 ms
Start 3.0 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)

Fixing the unchecked items could save ~58 KB and ~116 ms

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
40 requests over 4213ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.3 s LCP 11.0 shttps://www.virginia.gov// https://www.virginia.gov/ — 200 — 13.5 KiB — 1.3 s — h2https://www.virginia.gov/media/vagov/assets/css/main.css?v=215.0/media/vagov/assets/css/main.css?v=... https://www.virginia.gov/media/vagov/assets/css/main.css?v=215.0 — 200 — 39.0 KiB — 797 ms — h2https://www.virginia.gov/media/vagov/assets/css/seasonal/womenx27s-history-month/styles.css/media/vagov/assets/css/seasonal/wo... https://www.virginia.gov/media/vagov/assets/css/seasonal/womenx27s-history-month/styles.css — 200 — 908 B — 314 ms — h2https://www.virginia.gov/media/vagov/assets/js/jquery-3.5.1.js/media/vagov/assets/js/jquery-3.5.1... https://www.virginia.gov/media/vagov/assets/js/jquery-3.5.1.js — 200 — 83.5 KiB — 797 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css — 200 — 19.1 KiB — 24 ms — h3https://www.virginia.gov/media/vagov/assets/ico/cardinal_logo_v2.svg/media/vagov/assets/ico/cardinal_lo... https://www.virginia.gov/media/vagov/assets/ico/cardinal_logo_v2.svg — 200 — 2.5 KiB — 310 ms — h2https://www.virginia.gov/media/vagov/images/news/national-volunteer-week-2026.jpg/media/vagov/images/news/national-v... https://www.virginia.gov/media/vagov/images/news/national-volunteer-week-2026.jpg — 200 — 563.4 KiB — 1.3 s — h2https://www.virginia.gov/media/vagov/images/news/farmers-market-2026.jpg/media/vagov/images/news/farmers-ma... https://www.virginia.gov/media/vagov/images/news/farmers-market-2026.jpg — 200 — 232.2 KiB — 978 ms — h2https://www.virginia.gov/media/vagov/images/news/Couple-with-tablet-image.jpg/media/vagov/images/news/Couple-wit... https://www.virginia.gov/media/vagov/images/news/Couple-with-tablet-image.jpg — 200 — 222.7 KiB — 688 ms — h2https://www.virginia.gov/media/vagov/assets/ico/site.webmanifest/media/vagov/assets/ico/site.webman... https://www.virginia.gov/media/vagov/assets/ico/site.webmanifest — 200 — 1.1 KiB — 746 ms — h2https://www.virginia.gov/media/old-virginiagov/images/services/book-a-cabin.jpg/media/old-virginiagov/images/servi... https://www.virginia.gov/media/old-virginiagov/images/services/book-a-cabin.jpg — 200 — 84.1 KiB — 713 ms — h2https://mfpembedcdnwus2.azureedge.net/mfpembedcontwus2/Embed.jsmfpembedcdnwus2.azureedge.net/mfpem... https://mfpembedcdnwus2.azureedge.net/mfpembedcontwus2/Embed.js — 200 — 2.2 KiB — 29 ms — h2https://mfpembedcdnwus2.azureedge.net/mfpembedcontwus2/Embed.cssmfpembedcdnwus2.azureedge.net/mfpem... https://mfpembedcdnwus2.azureedge.net/mfpembedcontwus2/Embed.css — 200 — 1.4 KiB — 29 ms — h2https://www.virginia.gov/media/vagov/assets/js/common.js/media/vagov/assets/js/common.js https://www.virginia.gov/media/vagov/assets/js/common.js — 200 — 11.2 KiB — 691 ms — h2https://www.virginia.gov/media/vagov/assets/js/home.js/media/vagov/assets/js/home.js https://www.virginia.gov/media/vagov/assets/js/home.js — 200 — 1.6 KiB — 691 ms — h2https://www.googletagmanager.com/gtag/js?id=G-0DWMH7VB6Gwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-0DWMH7VB6G — 200 — 146.0 KiB — 58 ms — h2https://www.developer.virginia.gov/media/developer/resources/branding-bar/brandingbar.jswww.developer.virginia.gov/media/de... https://www.developer.virginia.gov/media/developer/resources/branding-bar/brandingbar.js — 200 — 197.2 KiB — 932 ms — h2https://www.virginia.gov/media/vagov/images/news/211.png/media/vagov/images/news/211.png https://www.virginia.gov/media/vagov/images/news/211.png — 200 — 20.2 KiB — 690 ms — h2https://www.virginia.gov/media/vagov/images/news/osig-abuse-hotline.jpg/media/vagov/images/news/osig-abuse... https://www.virginia.gov/media/vagov/images/news/osig-abuse-hotline.jpg — 200 — 168.6 KiB — 709 ms — h2https://www.virginia.gov/media/vagov/images/seasonal/native-american-heritage-month/nahm_archive.jpg/media/vagov/images/seasonal/native... https://www.virginia.gov/media/vagov/images/seasonal/native-american-heritage-month/nahm_archive.jpg — 200 — 74.7 KiB — 733 ms — h2https://www.virginia.gov/media/vagov/images/seasonal/vagov_bhm_celebrate-01.svg/media/vagov/images/seasonal/vagov_... https://www.virginia.gov/media/vagov/images/seasonal/vagov_bhm_celebrate-01.svg — 200 — 5.4 KiB — 699 ms — h2https://www.virginia.gov/media/vagov/images/seasonal/womenx27s-history-month/whm_logo_celebrate-02.svg/media/vagov/images/seasonal/womenx... https://www.virginia.gov/media/vagov/images/seasonal/womenx27s-history-month/whm_logo_celebrate-02.svg — 200 — 7.8 KiB — 699 ms — h2https://www.virginia.gov/media/vagov/images/governor_spanberger.jpg/media/vagov/images/governor_spanbe... https://www.virginia.gov/media/vagov/images/governor_spanberger.jpg — 200 — 168.7 KiB — 725 ms — h2https://www.virginia.gov/media/vagov/images/ltgovernor_hashmi.jpg/media/vagov/images/ltgovernor_hash... https://www.virginia.gov/media/vagov/images/ltgovernor_hashmi.jpg — 200 — 154.0 KiB — 716 ms — h2https://www.virginia.gov/media/vagov/images/ag75_portrait.jpg/media/vagov/images/ag75_portrait.j... https://www.virginia.gov/media/vagov/images/ag75_portrait.jpg — 200 — 135.6 KiB — 730 ms — h2data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns…data:image/svg+xml;charset=utf8,%3C... data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns… — 200 — 0 B — 0 ms — datahttps://www.virginia.gov/media/vagov/assets/img/capitol_outline.svg/media/vagov/assets/img/capitol_out... https://www.virginia.gov/media/vagov/assets/img/capitol_outline.svg — 200 — 7.4 KiB — 701 ms — h2data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns…data:image/svg+xml;charset=utf8,%3C... data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns…data:image/svg+xml;charset=utf8,%3C... data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns… — 200 — 0 B — 0 ms — datahttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-brands-400.woff2cdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-brands-400.woff2 — 200 — 115.3 KiB — 23 ms — h3
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.3 s LCP 11.0 shttps://www.virginia.gov// https://www.virginia.gov/ — 200 — 13.5 KiB — 1.3 s — h2https://www.virginia.gov/media/vagov/assets/css/main.css?v=215.0/media/vagov/assets/css/main.css?v=... https://www.virginia.gov/media/vagov/assets/css/main.css?v=215.0 — 200 — 39.0 KiB — 797 ms — h2https://www.virginia.gov/media/vagov/assets/css/seasonal/womenx27s-history-month/styles.css/media/vagov/assets/css/seasonal/wo... https://www.virginia.gov/media/vagov/assets/css/seasonal/womenx27s-history-month/styles.css — 200 — 908 B — 314 ms — h2https://www.virginia.gov/media/vagov/assets/js/jquery-3.5.1.js/media/vagov/assets/js/jquery-3.5.1... https://www.virginia.gov/media/vagov/assets/js/jquery-3.5.1.js — 200 — 83.5 KiB — 797 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css — 200 — 19.1 KiB — 24 ms — h3https://www.virginia.gov/media/vagov/assets/ico/cardinal_logo_v2.svg/media/vagov/assets/ico/cardinal_lo... https://www.virginia.gov/media/vagov/assets/ico/cardinal_logo_v2.svg — 200 — 2.5 KiB — 310 ms — h2https://www.virginia.gov/media/vagov/images/news/national-volunteer-week-2026.jpg/media/vagov/images/news/national-v... https://www.virginia.gov/media/vagov/images/news/national-volunteer-week-2026.jpg — 200 — 563.4 KiB — 1.3 s — h2https://www.virginia.gov/media/vagov/images/news/farmers-market-2026.jpg/media/vagov/images/news/farmers-ma... https://www.virginia.gov/media/vagov/images/news/farmers-market-2026.jpg — 200 — 232.2 KiB — 978 ms — h2https://www.virginia.gov/media/vagov/images/news/Couple-with-tablet-image.jpg/media/vagov/images/news/Couple-wit... https://www.virginia.gov/media/vagov/images/news/Couple-with-tablet-image.jpg — 200 — 222.7 KiB — 688 ms — h2https://www.virginia.gov/media/vagov/assets/ico/site.webmanifest/media/vagov/assets/ico/site.webman... 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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
42% of JavaScript execution is third-party
First-party Third-party 938ms · 343KB · $12/mo
Unattributable
Other
Costly
Execution 431ms
Transfer 0 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 332ms
Transfer 146 KB
Unused 43%
Monthly Cost $4/mo
www.developer.virginia.gov
Other
Optional
Execution 175ms
Transfer 197 KB
Unused 84%
Monthly Cost $2/mo

These scripts may cost more than they're worth

  • Unattributable adds 431ms and costs ~$6/month
  • Google Tag Manager adds 332ms and costs ~$4/month

42% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 431ms 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 332ms 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

84% of www.developer.virginia.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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