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.
2.75 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.11 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.47 s
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.
3.26 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.
6.68 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction5020ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.dw.com/static/index-Bgv_qheB.js | 2133ms | 1272ms | 2ms | 3rd |
| https://www.dw.com/ | 1331ms | 26ms | 5ms | 3rd |
| Unattributable | 613ms | 176ms | 0ms | 3rd |
| https://consent.dw.com/delivery/customdata/bV8xLndfNzAxNjYucl9HRFBSLmxfZW4uZF81MjI1OS54XzEwMTkudi5wLnRfNTIyNTkueHRfMzU5.js | 482ms | 445ms | 21ms | 3rd |
| https://www.dw.com/static/consentScript-B9SokloN.js | 243ms | 228ms | 0ms | 3rd |
| https://consent.dw.com/delivery/js/cmp_final_en.min.js | 117ms | 41ms | 75ms | 3rd |
| https://s.go-mpulse.net/boomerang/J2XBJ-XZGSZ-2254J-GTRXP-PD7UX | 101ms | 60ms | 32ms | 3rd |
BImage Optimization8 images, 0 KB saveableREVIEW
BJS Bundles9 scripts, 115 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.dw.com/static/index-Bgv_qheB.js | 107 KB | 42 KB (39%) | ✓ | 3rd |
| https://s.go-mpulse.net/boomerang/J2XBJ-XZGSZ-2254J-GTRXP-PD7UX | 57 KB | 37 KB (66%) | ✓ | 3rd |
| https://consent.dw.com/delivery/js/cmp_final_en.min.js | 101 KB | 36 KB (36%) | ✓ | 3rd |
| https://www.dw.com/static/consentScript-B9SokloN.js | 0 KB | — | ✓ | 3rd |
| https://www.dw.com/static/Tracking-BgbWWEJS.js | 0 KB | — | ✓ | 3rd |
| https://www.dw.com/static/trackers-DHMeENl1.js | 0 KB | — | ✓ | 3rd |
| https://www.dw.com/static/Tiktok-DxCqlanM.js | 0 KB | — | ✓ | 3rd |
| https://consent.dw.com/delivery/cmp.php?cdid=b33d6f92e190c&h=https%253A%252F%252Fwww.dw.com%252Fen%252Ftop-stories%252Fs-9097&__cmpfcc=1&l=en&o=1776294017375 | 5 KB | — | ✓ | 3rd |
| https://consent.dw.com/delivery/customdata/bV8xLndfNzAxNjYucl9HRFBSLmxfZW4uZF81MjI1OS54XzEwMTkudi5wLnRfNTIyNTkueHRfMzU5.js | 27 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Page Weight Budget454 KB transferred, 36 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (36 KB)PASS
Web fonts
2
36 KB total
Render-blocking
0
of 2
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 Hints4 hints, 0 missing preconnectsPASS
Current Resource Hints
4 resource hints configured
APage Weight Inventory36 resources · 454 KB · 115 KB savings availablePASS
~115.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 36 resources | 453.5 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+HTTP Cachingmax-age=60 (1 minute)PASS
max-age=60, s-maxage=300, public
| Directive | Value | Meaning |
|---|---|---|
| max-age | 60 | Cache for 1 minute |
| s-maxage | 300 | CDN caches for 5 minutes |
| public | — | Any cache may store this response |
Network Waterfall36 requests over 1439msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.dw.com www.dw.com | Other | 2133ms | 107 KB | 39% | €23/mo | Costly |
www.dw.com www.dw.com | Other | 1331ms | 5 KB | — | €14/mo | Costly |
Unattributable Unattributable | Other | 613ms | 0 KB | — | €7/mo | Costly |
consent.dw.com consent.dw.com | Other | 482ms | 27 KB | — | €5/mo | Costly |
www.dw.com www.dw.com | Other | 243ms | 0 KB | — | €3/mo | Costly |
consent.dw.com consent.dw.com | Other | 117ms | 101 KB | 36% | €1/mo | Optional |
s.go-mpulse.net s.go-mpulse.net | Other | 101ms | 57 KB | 66% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.dw.com adds 2133ms and costs ~€23/month
- www.dw.com adds 1331ms and costs ~€14/month
- Unattributable adds 613ms and costs ~€7/month
- consent.dw.com adds 482ms and costs ~€5/month
- www.dw.com adds 243ms and costs ~€3/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.dw.com takes 2133ms 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.dw.com takes 1331ms 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 613ms 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.dw.com takes 482ms 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.dw.com takes 243ms 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
66% of s.go-mpulse.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