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.
749 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
961 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
8 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
749 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
2.64 s
Page Load Progression
375 ms
750 ms
1.1 s 1.5 s 1.9 s 2.2 s 2.6 s 3.0 sDJS BundlesAction34 scripts, 357 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-K4K37P8 | 171 KB | 71 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-6L1221E6ET&cx=c>m=4e64k0 | 158 KB | 66 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-2QB41H1S1Q&cx=c>m=4e64k0 | 175 KB | 65 KB (37%) | ✓ | 3rd |
| https://usercentrics.com/wp-content/themes/usercentrics/dist/js/lib-dotlottie-player.js?ver=1776838298 | 96 KB | 61 KB (64%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-638WWFBXB6&cx=c>m=4e64k0 | 159 KB | 58 KB (37%) | ✓ | 3rd |
| https://web.cmp.usercentrics.eu/ui/v/3.117.0/WebSdk.lib.4c6726a9.js | 56 KB | 35 KB (63%) | ✓ | 3rd |
| https://usercentrics.com/wp-content/themes/usercentrics/dist/components/blocks/solutions-cards/js/solutions-cards.js?ver=1776838294 | 1 KB | — | ✓ | 1st |
| https://usercentrics.com/wp-content/themes/usercentrics/dist/components/templates/resources-card/js/resources-card.js?ver=1776838293 | 1 KB | — | ✓ | 1st |
| https://usercentrics.com/wp-content/themes/usercentrics/dist/js/animate-cards-bottom.js?ver=1776838294 | 1 KB | — | ✓ | 1st |
| https://usercentrics.com/wp-content/themes/usercentrics/dist/js/wp-plugin-link.js?ver=1776838301 | 1 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
DPage Weight InventoryAction102 resources · 1.8 MB · 357 KB savings availableFIX
~357.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 102 resources | 1.8 MiB | ||||||
CPage Weight BudgetAction1.8 MB transferred, 102 requestsREVIEW
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
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
BThird-Party Impact45% third-party, 0 ms blockingREVIEW
BImage Optimization44 images, 0 KB saveableREVIEW
CJS Execution CostAction1062ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://usercentrics.com/ | 634ms | 27ms | 13ms | 1st |
| Unattributable | 193ms | 24ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-6L1221E6ET&cx=c>m=4e64k0 | 109ms | 100ms | 8ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-K4K37P8 | 75ms | 61ms | 10ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-638WWFBXB6&cx=c>m=4e64k0 | 51ms | 41ms | 9ms | 3rd |
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 (253 KB)PASS
Web fonts
5
253 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 HintsNo optimization neededPASS
AHTTP Cachingmax-age=43200 (12 hours)PASS
max-age=43200, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| max-age | 43200 | Cache for 12 hours |
| must-revalidate | — | Must recheck with server after expiry |
Network Waterfall102 requests over 4140msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 193ms | 0 KB | — | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 109ms | 158 KB | 42% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 75ms | 171 KB | 42% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 51ms | 159 KB | 37% | €1/mo | Optional |
40% 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