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.
5.41 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
9.05 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.00 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.064
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.52 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.
28.92 s
Page Load Progression
375 ms
750 ms 1.1 s 1.5 s
1.9 s
2.2 s
2.6 s
3.0 sFPage Weight BudgetAction3.5 MB transferred, 110 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
FJS Execution CostAction4918ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 594ms | 94ms | 0ms | 3rd |
| https://www.unh.edu/ | 481ms | 6ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TQRMKXG | 432ms | 339ms | 75ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-P772CKRGS5&cx=c>m=4e64h1h1 | 375ms | 327ms | 43ms | 3rd |
| https://www.unh.edu/sites/default/files/js/js_B9UmOHC7M4qU-RefBavKwXIy83kavPnmGNDixmBOkWg.js?scope=footer&delta=0&language=en&theme=unh_base&include=eJx9j2sOAiEMhC-EciTS7Va2CnTTgo_biySaaNb9M2nnmyYdFCWPklcpVKodW1nCBEaHA4LODv_ihWAm3Q2oBJSUINJOLMvEiUKm0nZSVhkvj4AVuqEuisR-VCH62OV3P8IZ7t9mdtZW0hPb4j_TlhcWuZJyqf2DTW4ZUjJUorLNX5O1yf7RVYwrS3Hver5VTjZWlHLiaCGzoR9Gb5wkyqBxXtW_xF2ZbuaHjrJPXqeynw | 333ms | 161ms | 31ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-859654167&cx=c>m=4e64h1 | 313ms | 283ms | 28ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-587D24FVFK&cx=c>m=4e64h1 | 239ms | 194ms | 43ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-3DFCMP1B5M&cx=c>m=4e64h1 | 232ms | 180ms | 43ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-15375840&cx=c>m=4e64h1 | 223ms | 189ms | 31ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOQ.js | 210ms | 168ms | 39ms | 3rd |
Showing top 10 of 21 scripts
FJS BundlesAction32 scripts, 855 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-587D24FVFK&cx=c>m=4e64h1 | 174 KB | 72 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-3DFCMP1B5M&cx=c>m=4e64h1 | 156 KB | 67 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-P772CKRGS5&cx=c>m=4e64h1h1 | 156 KB | 66 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-56W32WF | 128 KB | 64 KB (50%) | ✓ | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOQ.js | 122 KB | 63 KB (52%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WB3JMG5 | 126 KB | 62 KB (49%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-15375840&cx=c>m=4e64h1 | 134 KB | 60 KB (45%) | ✓ | 3rd |
| https://www.unh.edu/sites/default/files/js/js_B9UmOHC7M4qU-RefBavKwXIy83kavPnmGNDixmBOkWg.js?scope=footer&delta=0&language=en&theme=unh_base&include=eJx9j2sOAiEMhC-EciTS7Va2CnTTgo_biySaaNb9M2nnmyYdFCWPklcpVKodW1nCBEaHA4LODv_ihWAm3Q2oBJSUINJOLMvEiUKm0nZSVhkvj4AVuqEuisR-VCH62OV3P8IZ7t9mdtZW0hPb4j_TlhcWuZJyqf2DTW4ZUjJUorLNX5O1yf7RVYwrS3Hver5VTjZWlHLiaCGzoR9Gb5wkyqBxXtW_xF2ZbuaHjrJPXqeynw | 94 KB | 60 KB (64%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-14617976&cx=c>m=4e64h1 | 131 KB | 59 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TQRMKXG | 177 KB | 57 KB (32%) | ✓ | 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 InventoryAction110 resources · 3.5 MB · 855 KB savings availableFIX
~855.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 110 resources | 3.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction18 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
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+Font Loading8 fonts (471 KB)PASS
Web fonts
8
471 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~136 KB and ~272 ms
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 Waterfall110 requests over 4336msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 594ms | 0 KB | — | $3/mo | Costly |
www.unh.edu www.unh.edu | Other | 481ms | 70 KB | — | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 432ms | 177 KB | 32% | $2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 375ms | 156 KB | 43% | $2/mo | Costly |
www.unh.edu www.unh.edu | Other | 333ms | 94 KB | 64% | $2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 313ms | 144 KB | 39% | $2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 239ms | 174 KB | 42% | $1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 232ms | 156 KB | 43% | $1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 223ms | 129 KB | 44% | $1/mo | Costly |
analytics.tiktok.com analytics.tiktok.com | Other | 210ms | 122 KB | 52% | $1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 204ms | 134 KB | 45% | $1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 202ms | 126 KB | 49% | $1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 200ms | 138 KB | 40% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 183ms | 131 KB | 45% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 139ms | 128 KB | 50% | $1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 126ms | 97 KB | 34% | $1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 122ms | 46 KB | — | $1/mo | Optional |
s.adroll.com s.adroll.com | Other | 107ms | 95 KB | — | $1/mo | Optional |
js.adsrvr.org js.adsrvr.org | Other | 82ms | 12 KB | — | $0/mo | Optional |
s.adroll.com s.adroll.com | Other | 69ms | 29 KB | 79% | $0/mo | Optional |
pixel.byspotify.com pixel.byspotify.com | Other | 51ms | 10 KB | — | $0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 594ms and costs ~$3/month
- www.unh.edu adds 481ms and costs ~$3/month
- Google Tag Manager adds 432ms and costs ~$2/month
- Google Tag Manager adds 375ms and costs ~$2/month
- www.unh.edu adds 333ms and costs ~$2/month
- Google Tag Manager adds 313ms and costs ~$2/month
- Google Tag Manager adds 239ms and costs ~$1/month
- Google Tag Manager adds 232ms and costs ~$1/month
- Google Tag Manager adds 223ms and costs ~$1/month
- analytics.tiktok.com adds 210ms and costs ~$1/month
- Google Tag Manager adds 204ms and costs ~$1/month
- Google Tag Manager adds 202ms and costs ~$1/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
Unattributable takes 594ms 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
www.unh.edu takes 481ms 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 432ms 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 375ms 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
www.unh.edu takes 333ms 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
64% of www.unh.edu'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 313ms 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 239ms 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 232ms 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 223ms 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
analytics.tiktok.com takes 210ms 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 analytics.tiktok.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 204ms 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 202ms 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
79% of s.adroll.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