Performance
· 27 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.
4.28 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
31.14 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.73 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.025
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
13.60 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.
33.15 s
Page Load Progression
FPage Weight BudgetAction6.4 MB transferred, 109 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
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
FJS Execution CostAction13637ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://consent.cookiebot.com/uc.js | 9070ms | 4816ms | 12ms | 3rd |
| Unattributable | 1540ms | 113ms | 0ms | 3rd |
| https://hr.bloombergadria.com/ | 1187ms | 139ms | 2ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=DC-16140268 | 415ms | 379ms | 33ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-9LGS7T5ZQW&cx=c>m=4e6562 | 250ms | 204ms | 44ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-16583849092&cx=c>m=4e6562 | 242ms | 211ms | 30ms | 3rd |
| https://firebase.bloombergadria.com/__/auth/iframe.js | 152ms | 84ms | 18ms | 3rd |
| https://consent.cookiebot.com/68e85b2d-a022-40b3-8309-ab5e699ae582/cc.js?renew=false&referer=hr.bloombergadria.com&dnt=false&init=false&culture=HR&framework=TCFv2.3 | 152ms | 24ms | 118ms | 3rd |
| https://sibforms.com/forms/end-form/build/main.js | 150ms | 112ms | 37ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-7837877242&cx=c>m=4e6562 | 136ms | 103ms | 32ms | 3rd |
Showing top 10 of 14 scripts
FJS BundlesAction31 scripts, 741 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/firebasejs/9.6.5/firebase-firestore.js | 188 KB | 119 KB (64%) | ✗ | 3rd |
| https://sibforms.com/forms/end-form/build/main.js | 125 KB | 92 KB (80%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MFH6938 | 155 KB | 69 KB (44%) | ✓ | 3rd |
| https://consent.cookiebot.com/Framework/IAB/consent-sdk-2.3.js | 88 KB | 64 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-16583849092&cx=c>m=4e6562 | 146 KB | 64 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-7837877242&cx=c>m=4e6562 | 126 KB | 63 KB (50%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-9LGS7T5ZQW&cx=c>m=4e6562 | 175 KB | 61 KB (35%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-16140268 | 130 KB | 58 KB (44%) | ✓ | 3rd |
| https://firebase.bloombergadria.com/__/auth/iframe.js | 91 KB | 55 KB (61%) | ✓ | 3rd |
| https://www.gstatic.com/firebasejs/9.6.5/firebase-auth.js | 76 KB | 33 KB (44%) | ✗ | 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
DPage Weight InventoryAction109 resources · 6.4 MB · 741 KB savings availableFIX
~741.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 109 resources | 6.4 MiB | ||||||
CImage OptimizationAction44 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CCompression AlgorithmActionMain response served uncompressedREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
AThird-Party Impact27% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (428 KB)PASS
Web fonts
7
428 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
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 ~105 KB and ~210 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints11 hints, 0 missing preconnectsPASS
Current Resource Hints
11 resource hints configured
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: /files/css/fonts/NeueHaasDisplayRoman/NeueHaasDisplay-Roman.woff2 (preload+preload), /files/css/fonts/HelveticaRegular2/Helvetica.woff2 (preload+preload), /files/css/fonts/HelveticaBold2/Helvetica-Bold.woff2 (preload+preload) (+2 more).
Performance issues directly impact user engagement and conversion rates.
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML max-age=120 (≤ 5min) is appropriatePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Hetzner Online GmbH
AHTTP Cachingmax-age=120 (2 minutes)PASS
max-age=120
| Directive | Value | Meaning |
|---|---|---|
| max-age | 120 | Cache for 2 minutes |
Network Waterfall109 requests over 5112msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
consent.cookiebot.com consent.cookiebot.com | Other | 9070ms | 27 KB | — | €125/mo | Costly |
Unattributable Unattributable | Other | 1540ms | 0 KB | — | €21/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 415ms | 130 KB | 44% | €6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 250ms | 175 KB | 35% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 242ms | 146 KB | 44% | €3/mo | Costly |
firebase.bloombergadria.com firebase.bloombergadria.com | Other | 152ms | 91 KB | 61% | €2/mo | Optional |
consent.cookiebot.com consent.cookiebot.com | Other | 152ms | 312 KB | — | €2/mo | Optional |
sibforms.com sibforms.com | Other | 150ms | 125 KB | 80% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 136ms | 126 KB | 50% | €2/mo | Optional |
www.gstatic.com www.gstatic.com | Other | 109ms | 76 KB | 44% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 95ms | 155 KB | 44% | €1/mo | Optional |
apis.google.com apis.google.com | Other | 77ms | 34 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- consent.cookiebot.com adds 9070ms and costs ~€125/month
- Unattributable adds 1540ms and costs ~€21/month
- Google Tag Manager adds 415ms and costs ~€6/month
- Google Tag Manager adds 250ms and costs ~€3/month
- Google Tag Manager adds 242ms and costs ~€3/month
91% 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
consent.cookiebot.com takes 9070ms 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 1540ms 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 415ms 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 250ms 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 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
61% of firebase.bloombergadria.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
80% of sibforms.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
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-04-11 — 2026-05-08)
LCP (p75)
1844 ms
85% good
INP (p75)
92 ms
92% good
CLS (p75)
0.030
93% good
FCP (p75)
1494 ms
TTFB (p75)
887 ms
Image Optimization200 images, 0 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
200
Total Size
0 KB
Oversized
1