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.
6.53 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
10.94 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.06 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.174
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
11.20 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.
30.55 s
Page Load Progression
479 ms
958 ms
1.4 s
1.9 s
2.4 s 2.9 s 3.4 s
3.8 sFPage Weight BudgetAction5.3 MB transferred, 188 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
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 CostAction9003ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1720ms | 396ms | 0ms | 3rd |
| https://tools.luckyorange.com/core/core.js?v=1c63ad4 | 1643ms | 1521ms | 32ms | 3rd |
| https://www.healthychildren.org/English/Pages/default.aspx | 722ms | 55ms | 20ms | 3rd |
| https://www.healthychildren.org/_layouts/15/init.js?rev=%2Be%2Fj2fE5FMW2sWBFY3SBvA%3D%3DTAG0 | 490ms | 425ms | 35ms | 3rd |
| https://www.healthychildren.org/_layouts/15/AAP.HealthyChildren/js/jquery-3.6.0.min.js?v=4.0 | 421ms | 316ms | 17ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-1FTMBGL94V&cx=c>m=4e64h1 | 401ms | 332ms | 64ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5FJ8N24 | 393ms | 320ms | 62ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-FD9D3XZVQQ&cx=c>m=4e64h1 | 362ms | 303ms | 55ms | 3rd |
| https://static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js | 344ms | 279ms | 42ms | 3rd |
| https://cdn.fundraiseup.com/widget/ADAHKUXY | 303ms | 262ms | 31ms | 3rd |
Showing top 10 of 26 scripts
FJS BundlesAction64 scripts, 1.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://static.fundraiseup.com/checkout.9e2624d0be733d7f.js | 410 KB | 366 KB (89%) | ✓ | 3rd |
| https://www.healthychildren.org/_layouts/15/core.js?rev=74F6aH9287K5hiLGz3pxCg%3D%3DTAG0 | 130 KB | 118 KB (91%) | ✓ | 3rd |
| https://static.fundraiseup.com/checkout-sentry-vendor.dda4c7629502a974.js | 112 KB | 112 KB (100%) | ✓ | 3rd |
| https://static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js | 105 KB | 87 KB (83%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-1FTMBGL94V&cx=c>m=4e64h1 | 173 KB | 67 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5FJ8N24 | 158 KB | 65 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-FD9D3XZVQQ&cx=c>m=4e64h1 | 152 KB | 64 KB (42%) | ✓ | 3rd |
| https://www.healthychildren.org/_layouts/15/init.js?rev=%2Be%2Fj2fE5FMW2sWBFY3SBvA%3D%3DTAG0 | 83 KB | 60 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-625583326 | 147 KB | 51 KB (35%) | ✓ | 3rd |
| https://aap.hum.works/js/main.js | 104 KB | 46 KB (45%) | ✓ | 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 InventoryAction188 resources · 5.3 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 188 resources | 5.3 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction38 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
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 Loading2 fonts (66 KB)PASS
Web fonts
2
66 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 Hints1 hints, 0 missing preconnectsPASS
Current Resource Hints
1 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall188 requests over 9669msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1720ms | 0 KB | — | $23/mo | Costly |
tools.luckyorange.com tools.luckyorange.com | Other | 1643ms | 82 KB | 45% | $22/mo | Costly |
www.healthychildren.org www.healthychildren.org | Other | 722ms | 35 KB | — | $10/mo | Costly |
www.healthychildren.org www.healthychildren.org | Other | 490ms | 83 KB | 73% | $7/mo | Costly |
www.healthychildren.org www.healthychildren.org | Other | 421ms | 31 KB | — | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 401ms | 173 KB | 39% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 393ms | 158 KB | 41% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 362ms | 152 KB | 42% | $5/mo | Costly |
static.fundraiseup.com static.fundraiseup.com | Other | 344ms | 105 KB | 83% | $5/mo | Costly |
cdn.fundraiseup.com cdn.fundraiseup.com | Other | 303ms | 66 KB | 34% | $4/mo | Costly |
cdn.userway.org cdn.userway.org | Other | 255ms | 48 KB | 55% | $3/mo | Costly |
static.fundraiseup.com static.fundraiseup.com | Other | 235ms | 410 KB | 89% | $3/mo | Costly |
Microsoft Clarity scripts.clarity.ms | Session Replay | 223ms | 26 KB | — | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 198ms | 147 KB | 35% | $3/mo | Optional |
aap.hum.works aap.hum.works | Other | 192ms | 104 KB | 45% | $3/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 163ms | 97 KB | 37% | $2/mo | Optional |
cdn.userway.org cdn.userway.org | Other | 134ms | 39 KB | — | $2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 111ms | 36 KB | — | $1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 101ms | 140 KB | — | $1/mo | Optional |
cdn.userway.org cdn.userway.org | Other | 96ms | 14 KB | — | $1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 95ms | 4 KB | — | $1/mo | Optional |
tools.luckyorange.com tools.luckyorange.com | Other | 91ms | 14 KB | — | $1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 83ms | 37 KB | — | $1/mo | Optional |
www.healthychildren.org www.healthychildren.org | Other | 76ms | 130 KB | 91% | $1/mo | Optional |
platform-api.sharethis.com platform-api.sharethis.com | Other | 76ms | 47 KB | 58% | $1/mo | Optional |
tools.luckyorange.com tools.luckyorange.com | Other | 73ms | 30 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1720ms and costs ~$23/month
- tools.luckyorange.com adds 1643ms and costs ~$22/month
- www.healthychildren.org adds 722ms and costs ~$10/month
- www.healthychildren.org adds 490ms and costs ~$7/month
- www.healthychildren.org adds 421ms and costs ~$6/month
- Google Tag Manager adds 401ms and costs ~$5/month
- Google Tag Manager adds 393ms and costs ~$5/month
- Google Tag Manager adds 362ms and costs ~$5/month
- static.fundraiseup.com adds 344ms and costs ~$5/month
- cdn.fundraiseup.com adds 303ms and costs ~$4/month
- cdn.userway.org adds 255ms and costs ~$3/month
- static.fundraiseup.com adds 235ms and costs ~$3/month
- Microsoft Clarity adds 223ms 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
Unattributable takes 1720ms 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
tools.luckyorange.com takes 1643ms 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.healthychildren.org takes 722ms 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.healthychildren.org takes 490ms 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
73% of www.healthychildren.org'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
www.healthychildren.org takes 421ms 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 401ms 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 393ms 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 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
static.fundraiseup.com takes 344ms 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
83% of static.fundraiseup.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
cdn.fundraiseup.com takes 303ms 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.userway.org takes 255ms 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
55% of cdn.userway.org'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
static.fundraiseup.com takes 235ms 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
89% of static.fundraiseup.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
Microsoft Clarity 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
91% of www.healthychildren.org'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
58% of platform-api.sharethis.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