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.
2.43 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.99 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
864 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.009
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.66 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.
19.61 s
Page Load Progression
FPage Weight BudgetAction7.7 MB transferred, 103 requestsFIX
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
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
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 CostAction4578ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 839ms | 20ms | 0ms | 3rd |
| https://www.ansi.org/ | 533ms | 21ms | 4ms | 3rd |
| https://www.ansi.org/Areas/ScoreCCF/js/Vendor/require.js?r= | 452ms | 365ms | 7ms | 3rd |
| https://www.ansi.org/Areas/ANSI/js/ANSI.bundle.js | 439ms | 86ms | 137ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-6NE40HPYPR&cx=c>m=4e64k0 | 436ms | 380ms | 52ms | 3rd |
| https://acsbapp.com/apps/app/dist/js/app.js | 405ms | 280ms | 80ms | 3rd |
| https://consent.cookiebot.com/d8cad3b9-fcb1-4742-91a0-0e1bc49c50d8/cc.js?renew=false&referer=www.ansi.org&dnt=false&init=false | 365ms | 154ms | 37ms | 3rd |
| https://www.ansi.org/Coveo/Hive/js/CoveoJsSearch.Lazy.min.js | 272ms | 148ms | 80ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WGZXGD | 208ms | 171ms | 33ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1071668309&cx=c>m=4e64k0 | 187ms | 136ms | 51ms | 3rd |
Showing top 10 of 15 scripts
FJS BundlesAction27 scripts, 660 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.ansi.org/Areas/ANSI/js/ANSI.bundle.js | 311 KB | 229 KB (74%) | ✗ | 3rd |
| https://acsbapp.com/apps/app/dist/js/app.js | 222 KB | 114 KB (53%) | ✓ | 3rd |
| https://www.ansi.org/Coveo/Hive/js/CoveoJsSearch.Lazy.min.js | 209 KB | 94 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-6NE40HPYPR&cx=c>m=4e64k0 | 177 KB | 69 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1071668309&cx=c>m=4e64k0 | 146 KB | 65 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WGZXGD | 153 KB | 64 KB (42%) | ✓ | 3rd |
| https://consent.cookiebot.com/d8cad3b9-fcb1-4742-91a0-0e1bc49c50d8/cc.js?renew=false&referer=www.ansi.org&dnt=false&init=false | 107 KB | 25 KB (24%) | ✓ | 3rd |
| https://www.ansi.org/Coveo/Hive/js/ValidateAnalyticsIncluded.min.js | 1 KB | — | ✓ | 3rd |
| https://www.ansi.org/Coveo/Hive/js/CoveoForSitecoreRankingExpression.min.js | 4 KB | — | ✓ | 3rd |
| https://www.ansi.org/Coveo/Hive/js/FacetsMobileMode.min__4e9032d9a7117b17aab0.js | 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
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 InventoryAction103 resources · 7.7 MB · 660 KB savings availableFIX
~660.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 103 resources | 7.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction48 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
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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (142 KB)PASS
Web fonts
7
142 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
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 ~35 KB and ~70 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
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall103 requests over 4703msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 839ms | 0 KB | — | $11/mo | Costly |
www.ansi.org www.ansi.org | Other | 533ms | 25 KB | — | $7/mo | Costly |
www.ansi.org www.ansi.org | Other | 452ms | 21 KB | — | $6/mo | Costly |
www.ansi.org www.ansi.org | Other | 439ms | 311 KB | 74% | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 436ms | 177 KB | 39% | $6/mo | Costly |
acsbapp.com acsbapp.com | Other | 405ms | 222 KB | 53% | $5/mo | Costly |
consent.cookiebot.com consent.cookiebot.com | Other | 365ms | 107 KB | 24% | $5/mo | Costly |
www.ansi.org www.ansi.org | Other | 272ms | 209 KB | 47% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 208ms | 153 KB | 42% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 187ms | 146 KB | 45% | $2/mo | Optional |
www.ansi.org www.ansi.org | Other | 108ms | 12 KB | — | $1/mo | Optional |
consent.cookiebot.com consent.cookiebot.com | Other | 105ms | 27 KB | — | $1/mo | Optional |
www.ansi.org www.ansi.org | Other | 98ms | 6 KB | — | $1/mo | Optional |
www.ansi.org www.ansi.org | Other | 79ms | 1 KB | — | $1/mo | Optional |
www.ansi.org www.ansi.org | Other | 52ms | 21 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 839ms and costs ~$11/month
- www.ansi.org adds 533ms and costs ~$7/month
- www.ansi.org adds 452ms and costs ~$6/month
- www.ansi.org adds 439ms and costs ~$6/month
- Google Tag Manager adds 436ms and costs ~$6/month
- acsbapp.com adds 405ms and costs ~$5/month
- consent.cookiebot.com adds 365ms and costs ~$5/month
- www.ansi.org adds 272ms and costs ~$4/month
- Google Tag Manager adds 208ms 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 839ms 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.ansi.org takes 533ms 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.ansi.org takes 452ms 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.ansi.org takes 439ms 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
74% of www.ansi.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
Google Tag Manager takes 436ms 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
acsbapp.com takes 405ms 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
53% of acsbapp.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
consent.cookiebot.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
www.ansi.org takes 272ms 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 208ms 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