Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.28 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.66 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.59 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.
3.70 s
Page Load Progression
FPage Weight BudgetAction3.9 MB transferred, 97 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction97 resources · 3.9 MB · 97 KB savings availableFIX
~97.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 97 resources | 3.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction45 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BJS Execution Cost701ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.justice.gov/ | 280ms | 6ms | 0ms | 3rd |
| Unattributable | 222ms | 4ms | 0ms | 3rd |
| https://www.justice.gov/d9/js/js_G8WsNmfSYUp5mpsAGVNXTFMZBWaZ2QZoXN6FK4gEmO8.js?scope=footer&delta=0&language=en&theme=usdoj_uswds&include=eJxVkOGuwjAIRl-o2kdqsLCJY7AUqve-vVOr0T-Q850ACdVEYHM-idUlV2uUHiVj6xvIcbK2JvoLYV3e2cDkHHRjpAJCLTIrRwozCd7y6Kk72qWAgvwHV88vpitp-JCXvm4rac-_OKwTtHrO3zBM9xt6Bnd6rpoIZ7uW2WwW-rooBnj44KGipudkqQshh7XCGjQ3CDbNLwV1_wHufJya7VbxDtH4dd4 | 114ms | 73ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L | 86ms | 71ms | 14ms | 3rd |
BJS Bundles22 scripts, 97 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L | 147 KB | 60 KB (41%) | ✓ | 3rd |
| https://www.justice.gov/d9/js/js_hTnaoOtM4X5XoPAr28zmLSvrLdw6doGAVmviXmhZOGY.js?scope=footer&delta=5&language=en&theme=usdoj_uswds&include=eJxVkOGuwjAIRl-o2kdqsLCJY7AUqve-vVOr0T-Q850ACdVEYHM-idUlV2uUHiVj6xvIcbK2JvoLYV3e2cDkHHRjpAJCLTIrRwozCd7y6Kk72qWAgvwHV88vpitp-JCXvm4rac-_OKwTtHrO3zBM9xt6Bnd6rpoIZ7uW2WwW-rooBnj44KGipudkqQshh7XCGjQ3CDbNLwV1_wHufJya7VbxDtH4dd4 | 56 KB | 37 KB (66%) | ✓ | 3rd |
| https://ustvstaticcdn1-a.akamaihd.net/js/fake-define.js?201205251501 | 1 KB | — | ✓ | 3rd |
| https://ustreamssl-a.akamaihd.net/web-player/ustream-player/branches/hlsjs-canary-2/js/ustream-player.min.js | 198 KB | — | ✓ | 3rd |
| https://unpkg.com/@popperjs/core@2.11.8/dist/umd/popper.min.js | 8 KB | — | ✓ | 3rd |
| https://cdn.jsdelivr.net/npm/js-cookie@3.0.5/dist/js.cookie.min.js | 1 KB | — | ✓ | 3rd |
| https://www.justice.gov/modules/contrib/uswds_ckeditor_integration/js/aftermarket/uswds_accordion.js?td8rv5 | 1 KB | — | ✓ | 3rd |
| https://cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick.min.js | 11 KB | — | ✓ | 3rd |
| https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOJ&sp=find&yt=true | 9 KB | — | ✓ | 3rd |
| https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js | 4 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
A+Text CompressionAll text resources are compressedPASS
A+Font Loading12 fonts (437 KB)PASS
Web fonts
12
437 KB total
Render-blocking
0
of 12
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall97 requests over 3113msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.justice.gov www.justice.gov | Other | 280ms | 15 KB | — | €3/mo | Costly |
Unattributable Unattributable | Other | 222ms | 0 KB | — | €2/mo | Costly |
www.justice.gov www.justice.gov | Other | 114ms | 32 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 86ms | 147 KB | 41% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.justice.gov adds 280ms and costs ~€3/month
- Unattributable adds 222ms and costs ~€2/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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.justice.gov takes 280ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 222ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev