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.
5.02 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.99 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
636 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.033
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.73 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.
13.13 s
Page Load Progression
FJS Execution CostAction4000ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://taz.de/lib/taz-verlag-node/js/alpinejs/dist/module.esm.js | 887ms | 662ms | 1ms | 1st |
| Unattributable | 683ms | 33ms | 0ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097963 | 646ms | 497ms | 76ms | 3rd |
| https://taz.de/ | 608ms | 109ms | 20ms | 1st |
| https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js | 494ms | 422ms | 18ms | 3rd |
| https://taz.de/lib/taz-verlag-node/js/swiper/swiper-bundle.esm.browser.min.js | 189ms | 95ms | 1ms | 1st |
| https://taz.de/lib/taz-verlag-node/js/own_functions.js | 146ms | 23ms | 4ms | 1st |
| https://securepubads.g.doubleclick.net/tag/js/gpt.js | 107ms | 92ms | 13ms | 3rd |
| https://cdn.privacy-mgmt.com/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js | 73ms | 54ms | 19ms | 3rd |
| https://taz.de/lib/taz-verlag-node/js/cash-dom/dist/cash.min.js | 59ms | 44ms | 3ms | 1st |
Showing top 10 of 12 scripts
DHTTP CachingActionno-store (uncacheable)FIX
max-age=0, no-cache, no-store, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| must-revalidate | — | Must recheck with server after expiry |
BPage Weight Budget1.4 MB transferred, 103 requestsREVIEW
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
BImage Optimization49 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
BJS Bundles15 scripts, 131 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097963 | 187 KB | 107 KB (57%) | ✓ | 3rd |
| https://taz.de/lib/taz-verlag-node/js/swiper/swiper-bundle.esm.browser.min.js | 41 KB | 23 KB (59%) | ✓ | 1st |
| https://taz.de/lib/taz-verlag-node/js/own_functions.js | 8 KB | — | ✗ | 1st |
| https://data-502d5cce76.taz.de/iomm/latest/bootstrap/stub.js | 1 KB | — | ✓ | 3rd |
| https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js | 42 KB | — | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/tag/js/gpt.js | 34 KB | — | ✓ | 3rd |
| https://data-502d5cce76.taz.de/iomm/latest/manager/base/es6/bundle.js | 19 KB | — | ✓ | 3rd |
| https://taz.de/lib/taz-verlag-node/js/alpinejs/dist/module.esm.js | 25 KB | — | ✗ | 1st |
| https://cdn.privacy-mgmt.com/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js | 29 KB | — | ✓ | 3rd |
| https://taz.de/lib/taz-verlag-node/js/steffiOtaz_de.WebelementSwitch.js | 4 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
CPage Weight InventoryAction103 resources · 1.4 MB · 131 KB savings availableREVIEW
~130.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 103 resources | 1.4 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
AThird-Party Impact28% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading12 fonts (183 KB)PASS
Web fonts
12
183 KB total
Render-blocking
0
of 12
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 ~1 KB and ~2 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints18 hints, 0 missing preconnectsPASS
Current Resource Hints
18 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall103 requests over 3452msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 683ms | 0 KB | — | €7/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 646ms | 187 KB | 57% | €7/mo | Costly |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 494ms | 42 KB | — | €5/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 107ms | 34 KB | — | €1/mo | Optional |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 73ms | 29 KB | — | €1/mo | Optional |
data-502d5cce76.taz.de data-502d5cce76.taz.de | Other | 57ms | 19 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 683ms and costs ~€7/month
- securepubads.g.doubleclick.net adds 646ms and costs ~€7/month
- cdn.privacy-mgmt.com adds 494ms and costs ~€5/month
51% 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
Unattributable takes 683ms 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
securepubads.g.doubleclick.net takes 646ms 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
57% of securepubads.g.doubleclick.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
cdn.privacy-mgmt.com takes 494ms 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