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.
4.29 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.03 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
678 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.
5.46 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.
12.13 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction54 resources · 1.4 MB · 257 KB savings availableFIX
~257.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 54 resources | 1.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.4 MB transferred, 54 requestsREVIEW
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
BImage Optimization25 images, 0 KB saveableREVIEW
CJS Execution CostAction1878ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-F8EYFE9Q1K&cx=c>m=4e64h1 | 374ms | 308ms | 61ms | 3rd |
| Unattributable | 362ms | 7ms | 0ms | 3rd |
| https://cdn.maryland.gov/mdwds/0.45.1/index-DEhZJjzx.js | 244ms | 48ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=G-GGBMYRN5BY&cx=c>m=4e64h1 | 238ms | 186ms | 50ms | 3rd |
| https://scripts.clarity.ms/0.8.60-beta/clarity.js | 186ms | 164ms | 7ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MNGLWP82 | 147ms | 120ms | 25ms | 3rd |
| https://www.maryland.gov/ | 124ms | 28ms | 4ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WNF8T3XF | 121ms | 93ms | 27ms | 3rd |
| https://cdn.maryland.gov/mdwds/0.45.1/css/mdwds.min.css | 83ms | 0ms | 0ms | 3rd |
CJS BundlesAction14 scripts, 257 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/destination?id=G-GGBMYRN5BY&cx=c>m=4e64h1 | 159 KB | 67 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WNF8T3XF | 121 KB | 64 KB (53%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-F8EYFE9Q1K&cx=c>m=4e64h1 | 157 KB | 64 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MNGLWP82 | 121 KB | 63 KB (52%) | ✓ | 3rd |
| https://www.maryland.gov/s3fs-public/js/js_x0lnYegAy98Y-IH3NP3jPlQZZkjTnYMalLlb5Hr3u48.js?scope=footer&delta=2&language=en&theme=maryland&include=eJxdyEEKAjEMBdALFXuk8k0CE5umJY06c3s3guDyPerShlJMmp7iWQfyeOAs1IU1Z7SQvaZvfUlL3E3qfzTWvQxXkTNNvVeO54LdviwDcRmcKzJBx8-D37w_Nvozmw | 4 KB | — | ✓ | 3rd |
| https://cdn.maryland.gov/mdwds/0.45.1/index-DEhZJjzx.js | 28 KB | — | ✗ | 3rd |
| https://cdn.maryland.gov/mdwds/0.45.1/js/mdwds-core.js | 16 KB | — | ✗ | 3rd |
| https://www.maryland.gov/cdn-cgi/zaraz/s.js?z=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 | 4 KB | — | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-GGBMYRN5BY&cx=c>m=4e64h1 | 0 KB | — | ✓ | 3rd |
| https://www.clarity.ms/tag/s33bdlfi5g | 1 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
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 Loading5 fonts (156 KB)PASS
Web fonts
5
156 KB total
Render-blocking
0
of 5
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
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall54 requests over 1837msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 374ms | 157 KB | 41% | €4/mo | Costly |
Unattributable Unattributable | Other | 362ms | 0 KB | — | €4/mo | Costly |
cdn.maryland.gov cdn.maryland.gov | Other | 244ms | 28 KB | — | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 238ms | 159 KB | 42% | €3/mo | Costly |
Microsoft Clarity scripts.clarity.ms | Session Replay | 186ms | 25 KB | — | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 147ms | 121 KB | 52% | €2/mo | Optional |
www.maryland.gov www.maryland.gov | Other | 124ms | 17 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 121ms | 121 KB | 53% | €1/mo | Optional |
cdn.maryland.gov cdn.maryland.gov | Other | 83ms | 84 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 374ms and costs ~€4/month
- Unattributable adds 362ms and costs ~€4/month
- cdn.maryland.gov adds 244ms and costs ~€3/month
- Google Tag Manager adds 238ms and costs ~€3/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
Google Tag Manager takes 374ms 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 362ms 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
cdn.maryland.gov takes 244ms 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 238ms 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 Google Tag Manager'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
53% of Google Tag Manager'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