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.
4.06 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.44 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.81 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.011
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.55 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.
24.76 s
Page Load Progression
501 ms
1.0 s 1.5 s
2.0 s
2.5 s 3.0 s 3.5 s
4.0 sFPage Weight BudgetAction3.0 MB transferred, 100 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction6915ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://static.formstack.com/forms/forms-renderer/builds/public/form_427ca0e87f.js | 1226ms | 775ms | 401ms | 3rd |
| https://www.ces.tech/ | 1058ms | 160ms | 10ms | 3rd |
| https://www.ces.tech/app/assets/app-CIukzwJo.js | 862ms | 324ms | 30ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KSBFDB | 692ms | 581ms | 78ms | 3rd |
| Unattributable | 671ms | 127ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-V8XKN0510H&cx=c>m=4e64k0 | 344ms | 294ms | 47ms | 3rd |
| https://connect.facebook.net/signals/config/540885651833605?v=2.9.303&r=stable&domain=www.ces.tech&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168 | 287ms | 247ms | 39ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-16685059800&cx=c>m=4e64k0 | 210ms | 172ms | 37ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-9506364&cx=c>m=4e64k0 | 194ms | 163ms | 30ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-12306339&cx=c>m=4e64k0 | 190ms | 158ms | 30ms | 3rd |
Showing top 10 of 20 scripts
FJS BundlesAction28 scripts, 1.0 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://static.formstack.com/forms/forms-renderer/builds/public/form_427ca0e87f.js | 713 KB | 454 KB (64%) | ✓ | 3rd |
| https://www.ces.tech/app/assets/app-CIukzwJo.js | 119 KB | 87 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-V8XKN0510H&cx=c>m=4e64k0 | 176 KB | 69 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-16685059800&cx=c>m=4e64k0 | 146 KB | 69 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-329253005&cx=c>m=4e64k0 | 144 KB | 69 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-787258920&cx=c>m=4e64k0 | 142 KB | 68 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-12306339&cx=c>m=4e64k0 | 130 KB | 63 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-9506364&cx=c>m=4e64k0 | 129 KB | 62 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KSBFDB | 184 KB | 57 KB (31%) | ✓ | 3rd |
| https://connect.facebook.net/signals/config/540885651833605?v=2.9.303&r=stable&domain=www.ces.tech&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168 | 125 KB | 36 KB (29%) | ✓ | 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 InventoryAction100 resources · 3.0 MB · 1.0 MB savings availableFIX
~1.0 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 100 resources | 3.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization30 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 Loading5 fonts (217 KB)PASS
Web fonts
5
217 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 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 Waterfall100 requests over 5665msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
static.formstack.com static.formstack.com | Other | 1226ms | 713 KB | 64% | $16/mo | Costly |
www.ces.tech www.ces.tech | Other | 1058ms | 85 KB | — | $14/mo | Costly |
www.ces.tech www.ces.tech | Other | 862ms | 119 KB | 73% | $11/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 692ms | 184 KB | 31% | $9/mo | Costly |
Unattributable Unattributable | Other | 671ms | 0 KB | — | $9/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 344ms | 176 KB | 39% | $5/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 287ms | 125 KB | 29% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 210ms | 146 KB | 48% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 194ms | 129 KB | 48% | $3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 190ms | 130 KB | 48% | $3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 187ms | 144 KB | 47% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 171ms | 142 KB | 48% | $2/mo | Optional |
js.monitor.azure.com js.monitor.azure.com | Other | 166ms | 46 KB | — | $2/mo | Optional |
LinkedIn Insight snap.licdn.com | Advertising | 120ms | 19 KB | — | $2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 119ms | 97 KB | 34% | $2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 110ms | 16 KB | — | $1/mo | Optional |
www.redditstatic.com www.redditstatic.com | Other | 105ms | 19 KB | — | $1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 84ms | 17 KB | — | $1/mo | Optional |
cookie-script.com cookie-script.com | Other | 67ms | 9 KB | — | $1/mo | Optional |
Twitter/X Pixel static.ads-twitter.com | Advertising | 53ms | 13 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- static.formstack.com adds 1226ms and costs ~$16/month
- www.ces.tech adds 1058ms and costs ~$14/month
- www.ces.tech adds 862ms and costs ~$11/month
- Google Tag Manager adds 692ms and costs ~$9/month
- Unattributable adds 671ms and costs ~$9/month
- Google Tag Manager adds 344ms and costs ~$5/month
- Facebook Pixel adds 287ms and costs ~$4/month
- Google Tag Manager adds 210ms 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
static.formstack.com takes 1226ms 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 static.formstack.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
www.ces.tech takes 1058ms 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.ces.tech takes 862ms 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.ces.tech'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 692ms 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 671ms 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 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
Facebook Pixel takes 287ms 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 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