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.
7.68 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
25.03 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
790 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.
11.76 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.
25.20 s
Page Load Progression
FPage Weight BudgetAction4.0 MB transferred, 151 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
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
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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
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 CostAction3678ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.yubico.com/wp-content/plugins/yubicool-wp/dist/uiScripts.js?ver=3.41.0-1776106139 | 793ms | 509ms | 17ms | 3rd |
| Unattributable | 759ms | 16ms | 0ms | 3rd |
| https://www.yubico.com/ | 538ms | 5ms | 2ms | 3rd |
| https://consent.cookiebot.com/da6f2ce1-6c50-45b9-9447-7f755996550d/cc.js?renew=false&referer=www.yubico.com&dnt=false&init=false | 356ms | 144ms | 27ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-7412315687&cx=c>m=4e64h1&sign=e37fa394f4e317d6c52f89ded4f4bd43a054a73816b86774a10c90ac751bd93d_20260421 | 348ms | 320ms | 23ms | 3rd |
| https://sgtm.yubico.com/gtm.js?id=GTM-KRDDCC | 264ms | 211ms | 43ms | 3rd |
| https://sgtm.yubico.com/gtag/js?id=G-3WWELRV1DR&cx=c>m=4e64h1&sign=e37fa394f4e317d6c52f89ded4f4bd43a054a73816b86774a10c90ac751bd93d_20260421 | 173ms | 129ms | 35ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-GWR21L054V&cx=c>m=4e64h1&sign=e37fa394f4e317d6c52f89ded4f4bd43a054a73816b86774a10c90ac751bd93d_20260421 | 151ms | 116ms | 33ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-858648531&cx=c>m=4e64h1&sign=e37fa394f4e317d6c52f89ded4f4bd43a054a73816b86774a10c90ac751bd93d_20260421 | 123ms | 94ms | 27ms | 3rd |
| https://fast.wistia.net/player.js | 95ms | 77ms | 17ms | 3rd |
Showing top 10 of 11 scripts
DJS BundlesAction17 scripts, 449 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://sgtm.yubico.com/gtag/js?id=G-3WWELRV1DR&cx=c>m=4e64h1&sign=e37fa394f4e317d6c52f89ded4f4bd43a054a73816b86774a10c90ac751bd93d_20260421 | 170 KB | 65 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-7412315687&cx=c>m=4e64h1&sign=e37fa394f4e317d6c52f89ded4f4bd43a054a73816b86774a10c90ac751bd93d_20260421 | 126 KB | 65 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-GWR21L054V&cx=c>m=4e64h1&sign=e37fa394f4e317d6c52f89ded4f4bd43a054a73816b86774a10c90ac751bd93d_20260421 | 160 KB | 65 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-858648531&cx=c>m=4e64h1&sign=e37fa394f4e317d6c52f89ded4f4bd43a054a73816b86774a10c90ac751bd93d_20260421 | 145 KB | 63 KB (43%) | ✓ | 3rd |
| https://sgtm.yubico.com/gtm.js?id=GTM-KRDDCC | 176 KB | 60 KB (34%) | ✓ | 3rd |
| https://fast.wistia.net/player.js | 55 KB | 41 KB (75%) | ✓ | 3rd |
| https://consent.cookiebot.com/da6f2ce1-6c50-45b9-9447-7f755996550d/cc.js?renew=false&referer=www.yubico.com&dnt=false&init=false | 115 KB | 26 KB (23%) | ✓ | 3rd |
| https://consent.cookiebot.com/uc.js?cbid=da6f2ce1-6c50-45b9-9447-7f755996550d&implementation=gtm&consentmode-dataredaction=dynamic | 36 KB | 23 KB (64%) | ✓ | 3rd |
| https://browser.sentry-cdn.com/9.6.1/bundle.min.js | 25 KB | 21 KB (86%) | ✓ | 3rd |
| https://www.yubico.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 29 KB | 21 KB (72%) | ✓ | 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 InventoryAction151 resources · 4.0 MB · 449 KB savings availableFIX
~449.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 151 resources | 4.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction50 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
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
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 Loading7 fonts (1315 KB)PASS
Web fonts
7
1315 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~612 KB and ~1224 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints6 hints, 0 missing preconnectsPASS
Current Resource Hints
6 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall151 requests over 2317msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.yubico.com www.yubico.com | Other | 793ms | 45 KB | — | €4/mo | Costly |
Unattributable Unattributable | Other | 759ms | 0 KB | — | €4/mo | Costly |
www.yubico.com www.yubico.com | Other | 538ms | 41 KB | — | €3/mo | Costly |
consent.cookiebot.com consent.cookiebot.com | Other | 356ms | 115 KB | 23% | €2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 348ms | 126 KB | 51% | €2/mo | Costly |
sgtm.yubico.com sgtm.yubico.com | Other | 264ms | 176 KB | 34% | €1/mo | Costly |
sgtm.yubico.com sgtm.yubico.com | Other | 173ms | 170 KB | 38% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 151ms | 160 KB | 41% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 123ms | 145 KB | 43% | €1/mo | Optional |
fast.wistia.net fast.wistia.net | Other | 95ms | 55 KB | 75% | €0/mo | Optional |
consent.cookiebot.com consent.cookiebot.com | Other | 78ms | 36 KB | 64% | €0/mo | Optional |
These scripts may cost more than they're worth
- www.yubico.com adds 793ms and costs ~€4/month
- Unattributable adds 759ms and costs ~€4/month
- www.yubico.com adds 538ms and costs ~€3/month
- consent.cookiebot.com adds 356ms and costs ~€2/month
- Google Tag Manager adds 348ms and costs ~€2/month
- sgtm.yubico.com adds 264ms and costs ~€1/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
www.yubico.com takes 793ms 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 759ms 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.yubico.com takes 538ms 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
consent.cookiebot.com takes 356ms 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 348ms 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 Google Tag Manager'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
sgtm.yubico.com takes 264ms 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
75% of fast.wistia.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
64% of consent.cookiebot.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