Performance
· 17 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.
2.75 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.58 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
772 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.
4.83 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.
17.40 s
Page Load Progression
FPage Weight BudgetAction3.4 MB transferred, 112 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
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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction3414ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.uscourts.gov/ | 745ms | 4ms | 1ms | 3rd |
| Unattributable | 538ms | 19ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-83ZBSG354S&cx=c>m=4e64h1 | 326ms | 275ms | 36ms | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js | 314ms | 269ms | 17ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L | 302ms | 253ms | 39ms | 3rd |
| https://www.uscourts.gov/sites/default/files/js/js_4IeZh9lgoJSjXlTsiHVs0ZjMR-afO22C9yVDF0o3cQM.js?scope=footer&delta=0&language=en&theme=uscgov&include=eJx1kOFuwzAIhF8orh_JojZ1UQhEBq_L289Z2kntlH-c-HTHkbVhzLqsKihul2656lcIWXvzcCMp2MKVNc9TPkEL2uy6BkNo-X6K3RGG1-l6bbRA28KC0g-otL4CX6C77jyj44TfziTza_eUU1WtjMkbiDG4tljIMgMtI9HI8UEFEzA2jyTk00hNvxXTUTE-HUCAN6ds_4nxA3BSSW8H7VgFHs6EFo9pm45SsbJegV-q26PsvjcsQ6bPxBEAJfzJkIv8AEjPojw | 189ms | 139ms | 26ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KHXCKX8P | 176ms | 132ms | 35ms | 3rd |
| https://maps.googleapis.com/maps/api/js?key=AIzaSyAOqwLK442_q7mNhlwr0uPFTxm7rg726a0&libraries=places | 175ms | 99ms | 52ms | 3rd |
| https://www.browsealoud.com/modules/3.11.0/4230.c222ded98d9c6a4219ab.js | 134ms | 97ms | 27ms | 3rd |
| https://www.browsealoud.com/modules/3.11.0/6514.ac3cda7a458b82b8b52f.js | 133ms | 96ms | 34ms | 3rd |
Showing top 10 of 14 scripts
FJS BundlesAction42 scripts, 618 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://maps.googleapis.com/maps/api/js?key=AIzaSyAOqwLK442_q7mNhlwr0uPFTxm7rg726a0&libraries=places | 179 KB | 99 KB (55%) | ✓ | 3rd |
| https://www.browsealoud.com/modules/3.11.0/4230.c222ded98d9c6a4219ab.js | 82 KB | 70 KB (85%) | ✓ | 3rd |
| https://www.uscourts.gov/sites/default/files/js/js_4IeZh9lgoJSjXlTsiHVs0ZjMR-afO22C9yVDF0o3cQM.js?scope=footer&delta=0&language=en&theme=uscgov&include=eJx1kOFuwzAIhF8orh_JojZ1UQhEBq_L289Z2kntlH-c-HTHkbVhzLqsKihul2656lcIWXvzcCMp2MKVNc9TPkEL2uy6BkNo-X6K3RGG1-l6bbRA28KC0g-otL4CX6C77jyj44TfziTza_eUU1WtjMkbiDG4tljIMgMtI9HI8UEFEzA2jyTk00hNvxXTUTE-HUCAN6ds_4nxA3BSSW8H7VgFHs6EFo9pm45SsbJegV-q26PsvjcsQ6bPxBEAJfzJkIv8AEjPojw | 102 KB | 70 KB (69%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-83ZBSG354S&cx=c>m=4e64h1 | 151 KB | 64 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KHXCKX8P | 133 KB | 62 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L | 147 KB | 60 KB (41%) | ✓ | 3rd |
| https://www.uscourts.gov/sites/default/files/js/js_0s-AviPvXBpDOIvXX7kzsmnu2UA_PrrUbvAXkUFp0KQ.js?scope=footer&delta=2&language=en&theme=uscgov&include=eJx1kOFuwzAIhF8orh_JojZ1UQhEBq_L289Z2kntlH-c-HTHkbVhzLqsKihul2656lcIWXvzcCMp2MKVNc9TPkEL2uy6BkNo-X6K3RGG1-l6bbRA28KC0g-otL4CX6C77jyj44TfziTza_eUU1WtjMkbiDG4tljIMgMtI9HI8UEFEzA2jyTk00hNvxXTUTE-HUCAN6ds_4nxA3BSSW8H7VgFHs6EFo9pm45SsbJegV-q26PsvjcsQ6bPxBEAJfzJkIv8AEjPojw | 61 KB | 46 KB (76%) | ✓ | 3rd |
| https://www.browsealoud.com/modules/3.11.0/6514.ac3cda7a458b82b8b52f.js | 103 KB | 40 KB (39%) | ✓ | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js | 55 KB | 29 KB (52%) | ✓ | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/common.js | 37 KB | 27 KB (74%) | ✓ | 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
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
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
FPage Weight InventoryAction112 resources · 3.4 MB · 618 KB savings availableFIX
~617.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 112 resources | 3.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization28 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading9 fonts (235 KB)PASS
Web fonts
9
235 KB total
Render-blocking
0
of 9
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+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall112 requests over 3460msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.uscourts.gov www.uscourts.gov | Other | 745ms | 26 KB | — | $10/mo | Costly |
Unattributable Unattributable | Other | 538ms | 0 KB | — | $7/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 326ms | 151 KB | 43% | $4/mo | Costly |
script.crazyegg.com script.crazyegg.com | Other | 314ms | 55 KB | 52% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 302ms | 147 KB | 41% | $4/mo | Costly |
www.uscourts.gov www.uscourts.gov | Other | 189ms | 102 KB | 69% | $3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 176ms | 133 KB | 47% | $2/mo | Optional |
maps.googleapis.com maps.googleapis.com | Other | 175ms | 179 KB | 55% | $2/mo | Optional |
www.browsealoud.com www.browsealoud.com | Other | 134ms | 82 KB | 85% | $2/mo | Optional |
www.browsealoud.com www.browsealoud.com | Other | 133ms | 103 KB | 39% | $2/mo | Optional |
www.uscourts.gov www.uscourts.gov | Other | 132ms | 61 KB | 76% | $2/mo | Optional |
maps.googleapis.com maps.googleapis.com | Other | 118ms | 37 KB | 74% | $2/mo | Optional |
dap.digitalgov.gov dap.digitalgov.gov | Other | 66ms | 4 KB | — | $1/mo | Optional |
maps.googleapis.com maps.googleapis.com | Other | 66ms | 70 KB | 38% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.uscourts.gov adds 745ms and costs ~$10/month
- Unattributable adds 538ms and costs ~$7/month
- Google Tag Manager adds 326ms and costs ~$4/month
- script.crazyegg.com adds 314ms and costs ~$4/month
- Google Tag Manager adds 302ms and costs ~$4/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.uscourts.gov takes 745ms 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 538ms 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
Google Tag Manager takes 326ms 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
script.crazyegg.com takes 314ms 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
52% of script.crazyegg.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 302ms 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
69% of www.uscourts.gov's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
55% of maps.googleapis.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
85% of www.browsealoud.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
76% of www.uscourts.gov's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
74% of maps.googleapis.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev