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.
988 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.27 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.040
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.81 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.
2.87 s
Page Load Progression
FPage Weight BudgetAction18.8 MB transferred, 124 requestsFIX
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
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
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
FJS BundlesAction45 scripts, 580 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c>m=4e64k0h2 | 147 KB | 106 KB (72%) | ✓ | 3rd |
| https://www.gsa.gov/sites/gsa.gov/files/js/js_ynERFnCjSxXEMR6BIKrwpC3iUumKJuLYRzeJp5a5lzo.js?scope=footer&delta=0&language=en&theme=gsa&include=eJx9kl124zAIhTfkVk9dDwdLWKGRhI7AadLVF9vpz2Rm-oKtzxfBxcTaQ0UuJgtfp4SGBW80wkwnvLAMnRIPisYXCl9v8KoTVRqZWrzBjK15xiOYskguBIY5ZA-P52d8xeufsE5ZMSTsYAPjmVveQS4yY3nSOLib7ugklTpmgohGWQbTwbn11eCChd0KS9uhstET1z7kQhuAeKbEJuMFTlS6975Brtt9VGdKu2iRUWEQxu0eDX-jiVuiTh6aQaW2hkcAqEresZdITBVMpMBcJJ7D3XfFrlAEk8_rH6pPVHgeuJtULKTeR3TrJ7Sw95soeT1VzNvI1Ny6GkcNaawdy_M3mWx2Zca93RmVJpPOEY5ZrmpS-R0PxxijeHlpQNeOLQGW8ot88SairM2SvDXwrPsa_D9jG6kubs43yj83-0XLjQ2ODfipWkTM_9_xuI_pNq36ljTs8QPFyCQ0 | 117 KB | 85 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HBYXWFP794&cx=c>m=4e64k0h2 | 155 KB | 63 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L | 147 KB | 61 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W4SGTNW | 146 KB | 56 KB (38%) | ✓ | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/main.js | 83 KB | 54 KB (66%) | ✓ | 3rd |
| https://www.gsa.gov/libraries/fancy-apps-photo-gallery/dist/fancybox/fancybox.umd.js?tdm59v | 42 KB | 37 KB (88%) | ✓ | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/common.js | 37 KB | 27 KB (73%) | ✓ | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/util.js | 70 KB | 26 KB (38%) | ✓ | 3rd |
| https://gov1.siteintercept.qualtrics.com/dxjsmodule/CoreModule.js?Q_CLIENTVERSION=2.46.0&Q_CLIENTTYPE=web&Q_BRANDID=cemgsa | 32 KB | 23 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 InventoryAction124 resources · 18.8 MB · 580 KB savings availableFIX
~580.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 124 resources | 18.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction42 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+JS Execution Cost481ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 182ms | 2ms | 0ms | 3rd |
| https://www.gsa.gov/ | 123ms | 3ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W4SGTNW | 69ms | 57ms | 9ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HBYXWFP794&cx=c>m=4e64k0h2 | 57ms | 48ms | 8ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L | 51ms | 44ms | 7ms | 3rd |
A+Font Loading2 fonts (41 KB)PASS
Web fonts
2
41 KB total
Render-blocking
0
of 2
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
Network Waterfall124 requests over 5989msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 182ms | 0 KB | — | $2/mo | Optional |
www.gsa.gov www.gsa.gov | Other | 123ms | 29 KB | — | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 69ms | 146 KB | 38% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 57ms | 155 KB | 40% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 51ms | 147 KB | 41% | $1/mo | Optional |
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