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.
1.15 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.56 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 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.
1.60 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.
1.57 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization9 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
BJS Execution Cost517ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.businessinsider.de/ | 168ms | 26ms | 3ms | 3rd |
| Unattributable | 122ms | 6ms | 0ms | 3rd |
| https://www.asadcdn.com/adlib/pages/businessinsider.js | 95ms | 72ms | 2ms | 3rd |
| https://www.businessinsider.de/cdn-cgi/challenge-platform/scripts/jsd/main.js | 74ms | 69ms | 1ms | 3rd |
| https://www.businessinsider.de/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 57ms | 52ms | 3ms | 3rd |
CJS BundlesAction55 scripts, 189 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.businessinsider.de/wp-content/themes/business-insider/dist/vendor-search-BTXWOZJa.js | 52 KB | 48 KB (93%) | ✓ | 3rd |
| https://www.businessinsider.de/wp-content/themes/business-insider/dist/sourcepoint-CjS1nqJi.js | 46 KB | 41 KB (91%) | ✓ | 3rd |
| https://www.businessinsider.de/wp-content/themes/business-insider/dist/vendor-wordpress-DvU_m840.js | 55 KB | 40 KB (73%) | ✓ | 3rd |
| https://www.businessinsider.de/wp-content/themes/business-insider/dist/vendor-react-B3U6F81a.js | 45 KB | 38 KB (85%) | ✓ | 3rd |
| https://www.businessinsider.de/wp-content/themes/business-insider/dist/index-de.js?ver=d64a8bde31bf871ad3339eee3e9cff9a1deac953 | 29 KB | 22 KB (76%) | ✓ | 3rd |
| https://www.asadcdn.com/adlib/libmodules/desktop/extendSlot.82db946b.js | 1 KB | — | ✓ | 3rd |
| https://www.asadcdn.com/adlib/libmodules/desktop/isChildOf.8f6a7f93.js | 0 KB | — | ✓ | 3rd |
| https://www.businessinsider.de/wp-includes/js/underscore.min.js?ver=1.13.7 | 8 KB | — | ✓ | 3rd |
| https://www.businessinsider.de/wp-includes/js/wp-util.min.js?ver=6.9 | 1 KB | — | ✓ | 3rd |
| https://www.businessinsider.de/wp-content/themes/business-insider/dist/index.js?ver=d64a8bde31bf871ad3339eee3e9cff9a1deac953 | 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
APage Weight Budget1005 KB transferred, 87 requestsPASS
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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (147 KB)PASS
Web fonts
4
147 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~2 KB and ~4 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
APage Weight Inventory87 resources · 1005 KB · 189 KB savings availablePASS
~189.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 87 resources | 1005.3 KiB | ||||||
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall87 requests over 1778msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.businessinsider.de www.businessinsider.de | Other | 168ms | 59 KB | — | €2/mo | Optional |
Unattributable Unattributable | Other | 122ms | 0 KB | — | €1/mo | Optional |
www.asadcdn.com www.asadcdn.com | Other | 95ms | 24 KB | — | €1/mo | Optional |
www.businessinsider.de www.businessinsider.de | Other | 74ms | 0 KB | — | €1/mo | Optional |
www.businessinsider.de www.businessinsider.de | Other | 57ms | 30 KB | — | €1/mo | Optional |
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