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.
4.52 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.
5.71 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.027
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.98 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.
30.13 s
Page Load Progression
FPage Weight BudgetAction4.3 MB transferred, 154 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 CostAction13662ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1544ms | 237ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-NJ0EYRGSL1&cx=c>m=4e64h1h1 | 1384ms | 1253ms | 108ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5FJBVHB | 1189ms | 954ms | 143ms | 3rd |
| https://www.ada.org/ | 1067ms | 84ms | 6ms | 3rd |
| https://www.ada.org/-/media/base-themes/core-libraries/scripts/optimized-min.js?rev=435309a91f9b4390a5dad6339ab31247&t=20200925T153436Z&hash=EBFD1E5C1AF94614F38516A56766C40D | 891ms | 637ms | 175ms | 3rd |
| https://js.hs-analytics.net/analytics/1776812700000/436395.js | 877ms | 632ms | 21ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 768ms | 633ms | 89ms | 3rd |
| https://o546.ada.org/script.js | 594ms | 507ms | 20ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-NVSBFQCBYE&cx=c>m=4e64h1h1 | 549ms | 407ms | 73ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-948518726&cx=c>m=4e64h1h1 | 488ms | 318ms | 69ms | 3rd |
Showing top 10 of 35 scripts
FJS BundlesAction51 scripts, 1.3 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.ada.org/-/media/base-themes/core-libraries/scripts/optimized-min.js?rev=435309a91f9b4390a5dad6339ab31247&t=20200925T153436Z&hash=EBFD1E5C1AF94614F38516A56766C40D | 404 KB | 314 KB (78%) | ✓ | 3rd |
| https://o546.ada.org/plugin/library/9b34433954b9245e205222b1f3d342ae | 160 KB | 122 KB (77%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 188 KB | 111 KB (59%) | ✓ | 3rd |
| https://static.cloud.coveo.com/searchui/v2.10099/js/CoveoJsSearch.Lazy.min.js | 210 KB | 103 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5FJBVHB | 187 KB | 70 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-948518726&cx=c>m=4e64h1h1 | 145 KB | 67 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-X8X57NRJ4D&cx=c>m=4e64h1h1 | 178 KB | 67 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-NVSBFQCBYE&cx=c>m=4e64h1h1 | 159 KB | 64 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-1519NCPJNX&cx=c>m=4e64h1h1 | 160 KB | 63 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-NJ0EYRGSL1&cx=c>m=4e64h1h1 | 170 KB | 62 KB (36%) | ✓ | 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 InventoryAction154 resources · 4.3 MB · 1.3 MB savings availableFIX
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 154 resources | 4.3 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
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 Loading3 fonts (76 KB)PASS
Web fonts
3
76 KB total
Render-blocking
0
of 3
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
Network Waterfall154 requests over 5352msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1544ms | 0 KB | — | $20/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 1384ms | 170 KB | 36% | $18/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 1189ms | 187 KB | 37% | $16/mo | Costly |
www.ada.org www.ada.org | Other | 1067ms | 12 KB | — | $14/mo | Costly |
www.ada.org www.ada.org | Other | 891ms | 404 KB | 78% | $12/mo | Costly |
HubSpot Analytics js.hs-analytics.net | Analytics | 877ms | 45 KB | — | $12/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 768ms | 188 KB | 59% | $10/mo | Costly |
o546.ada.org o546.ada.org | Other | 594ms | 44 KB | — | $8/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 549ms | 159 KB | 40% | $7/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 488ms | 145 KB | 47% | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 428ms | 178 KB | 38% | $6/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 420ms | 112 KB | 54% | $6/mo | Essential |
Google Tag Manager www.googletagmanager.com | Tag Manager | 418ms | 138 KB | 43% | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 406ms | 160 KB | 39% | $5/mo | Costly |
static.cloud.coveo.com static.cloud.coveo.com | Other | 365ms | 210 KB | 51% | $5/mo | Costly |
developer.livehelpnow.net developer.livehelpnow.net | Other | 242ms | 52 KB | 79% | $3/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 219ms | 97 KB | 36% | $3/mo | Costly |
js.hubspot.com js.hubspot.com | Other | 198ms | 28 KB | — | $3/mo | Optional |
sc-static.net sc-static.net | Other | 196ms | 25 KB | — | $3/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 162ms | 33 KB | — | $2/mo | Optional |
static.cloud.coveo.com static.cloud.coveo.com | Other | 147ms | 12 KB | — | $2/mo | Optional |
www.googletagservices.com www.googletagservices.com | Other | 128ms | 34 KB | — | $2/mo | Optional |
cdn.bc0a.com cdn.bc0a.com | Other | 116ms | 27 KB | — | $2/mo | Optional |
harborside.blueconic.net harborside.blueconic.net | Other | 97ms | 1 KB | — | $1/mo | Optional |
www.ada.org www.ada.org | Other | 96ms | 63 KB | 76% | $1/mo | Optional |
static.cloud.coveo.com static.cloud.coveo.com | Other | 94ms | 22 KB | — | $1/mo | Optional |
o546.ada.org o546.ada.org | Other | 79ms | 160 KB | 77% | $1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 72ms | 18 KB | — | $1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 66ms | 9 KB | — | $1/mo | Essential |
Twitter/X Pixel static.ads-twitter.com | Advertising | 66ms | 13 KB | — | $1/mo | Optional |
ep2.adtrafficquality.google ep2.adtrafficquality.google | Other | 64ms | 8 KB | — | $1/mo | Optional |
o546.ada.org o546.ada.org | Other | 59ms | 46 KB | 63% | $1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 59ms | 16 KB | — | $1/mo | Optional |
siteimproveanalytics.com siteimproveanalytics.com | Other | 58ms | 11 KB | — | $1/mo | Optional |
tags.srv.stackadapt.com tags.srv.stackadapt.com | Other | 56ms | 8 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1544ms and costs ~$20/month
- Google Tag Manager adds 1384ms and costs ~$18/month
- Google Tag Manager adds 1189ms and costs ~$16/month
- www.ada.org adds 1067ms and costs ~$14/month
- www.ada.org adds 891ms and costs ~$12/month
- HubSpot Analytics adds 877ms and costs ~$12/month
- securepubads.g.doubleclick.net adds 768ms and costs ~$10/month
- o546.ada.org adds 594ms and costs ~$8/month
- Google Tag Manager adds 549ms and costs ~$7/month
- Google Tag Manager adds 488ms and costs ~$6/month
- Google Tag Manager adds 428ms and costs ~$6/month
- Google Tag Manager adds 418ms and costs ~$6/month
- Google Tag Manager adds 406ms and costs ~$5/month
- static.cloud.coveo.com adds 365ms and costs ~$5/month
- developer.livehelpnow.net adds 242ms and costs ~$3/month
- Facebook Pixel adds 219ms 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 1544ms 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 1384ms 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 1189ms 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.ada.org takes 1067ms 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.ada.org takes 891ms 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
78% of www.ada.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
HubSpot Analytics takes 877ms 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
securepubads.g.doubleclick.net takes 768ms 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
59% of securepubads.g.doubleclick.net'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
o546.ada.org 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
Google Tag Manager takes 549ms 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 488ms 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 428ms 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
54% of OneTrust'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 418ms 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 406ms 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.cloud.coveo.com takes 365ms 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
51% of static.cloud.coveo.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
developer.livehelpnow.net takes 242ms 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 developer.livehelpnow.net'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
Facebook Pixel takes 219ms 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
76% of www.ada.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
77% of o546.ada.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
63% of o546.ada.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