Performance
· 15 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.
4.47 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
87 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.018
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.24 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.
4.48 s
Page Load Progression
FPage Weight BudgetAction6.9 MB transferred, 59 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
FJS BundlesAction22 scripts, 1.3 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://adr.org/assets/index-hf5uQyB3.js | 1765 KB | 1031 KB (59%) | ✓ | 1st |
| https://forms.adr.org/w37htfhcq2/vendor/7348e447-1b00-4242-9c5a-669142f8ada2/main.js?cb=8DCB3ECB413095BC01D1B29BF4757228 | 116 KB | 68 KB (58%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NGKJQ5B | 148 KB | 63 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-617207326&cx=c>m=4e64k0h1 | 144 KB | 61 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-2NJ0HVM6YV&cx=c>m=4e64k0h1 | 178 KB | 59 KB (33%) | ✓ | 3rd |
| https://cmp.osano.com/6orHSTEE9zcK1aZK/88e10f9e-cd04-4a60-b5d0-bc971b5649af/osano.js | 93 KB | 32 KB (35%) | ✓ | 3rd |
| https://forms.adr.org/w37htfhcq2/vendor/7348e447-1b00-4242-9c5a-669142f8ada2/lightbox_speed.js | 2 KB | — | ✓ | 3rd |
| https://forms.adr.org/w37htfhcq2/vendor/7348e447-1b00-4242-9c5a-669142f8ada2/custom.js?cb=68529BFAD5E577AD07C91A5AA8D7EE58 | 16 KB | — | ✓ | 3rd |
| https://adr.org/common.js?async | 163 KB | — | ✓ | 1st |
| https://adr.org/js/site.js | 2 KB | — | ✓ | 1st |
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 InventoryAction59 resources · 6.9 MB · 1.3 MB savings availableFIX
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 59 resources | 6.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization14 images, 0 KB saveableREVIEW
CJS Execution CostAction1523ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://adr.org/common.js?async | 497ms | 483ms | 5ms | 1st |
| Unattributable | 323ms | 3ms | 0ms | 3rd |
| https://adr.org/assets/index-hf5uQyB3.js | 153ms | 135ms | 2ms | 1st |
| https://adr.org/ | 147ms | 5ms | 1ms | 1st |
| https://cmp.osano.com/6orHSTEE9zcK1aZK/88e10f9e-cd04-4a60-b5d0-bc971b5649af/osano.js | 131ms | 95ms | 9ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-2NJ0HVM6YV&cx=c>m=4e64k0h1 | 93ms | 81ms | 12ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NGKJQ5B | 69ms | 54ms | 13ms | 3rd |
| https://forms.adr.org/a4flkt7l2b/z9gd/7348e447-1b00-4242-9c5a-669142f8ada2/adr.org/jsonp/z?cb=1776890138244&callback=__dgo4806yug3fns | 55ms | 53ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-617207326&cx=c>m=4e64k0h1 | 54ms | 43ms | 10ms | 3rd |
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Third-Party Impact10% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (99 KB)PASS
Web fonts
4
99 KB total
Render-blocking
0
of 4
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
Network Waterfall59 requests over 11809msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 323ms | 0 KB | — | €4/mo | Costly |
cmp.osano.com cmp.osano.com | Other | 131ms | 93 KB | 35% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 93ms | 178 KB | 33% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 69ms | 148 KB | 43% | €1/mo | Optional |
forms.adr.org forms.adr.org | Other | 55ms | 1 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 54ms | 144 KB | 42% | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 323ms and costs ~€4/month
48% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
Unattributable takes 323ms 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