https://Donaubad.cloud
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
93
GRADE
A
FIX
1
REVIEW
6
PASS
12
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
99
96
100
92
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
586 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
856 ms
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.
1.03 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.
856 ms
Page Load Progression
375 ms 750 ms 1.1 s
1.5 s 1.9 s 2.2 s 2.6 s 3.0 sChecks
2112 PASS 6 REVIEW 1 FIX
FHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BJS Bundles7 scripts, 46 KB unusedREVIEW
JS Bundles
7 scripts, 46 KB unused
7 scripts, 46 KB unused
Warning::
https://donaubad.cloud/wp-includes/js/jquery/jquer...: 46 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://donaubad.cloud/wp-content/themes/twentysev...: unminified — 3 KB could be saved
Warning::
https://donaubad.cloud/wp-content/themes/twentysev...: unminified — 2 KB could be saved
Info::
Total unused JavaScript: 46 KB
46 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://donaubad.cloud/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 86 KB | 46 KB (53%) | ✓ | 1st |
| https://donaubad.cloud/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1 | 14 KB | — | ✓ | 1st |
| https://donaubad.cloud/wp-content/themes/twentyseventeen/assets/js/global.js?ver=20211130 | 8 KB | — | ✗ | 1st |
| https://donaubad.cloud/wp-content/themes/twentyseventeen/assets/js/navigation.js?ver=20210122 | 4 KB | — | ✓ | 1st |
| https://donaubad.cloud/wp-content/themes/twentyseventeen/assets/js/jquery.scrollTo.js?ver=2.1.3 | 6 KB | — | ✗ | 1st |
| blob:https://donaubad.cloud/df58dee9-b9f0-4b79-8e5a-2bb469d6c869 | -0 KB | — | ✓ | 3rd |
| https://donaubad.cloud/wp-includes/js/wp-emoji-release.min.js?ver=6.9.4 | 22 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
HTTP/3 (QUIC)
HTTP/3 not advertised
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
CCompression AlgorithmActionMain response served uncompressedREVIEW
Compression Algorithm
ActionMain response served uncompressed
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
Main HTML Cache-Control
No Cache-Control header on main HTML response
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Page Weight Budget622 KB transferred, 16 requestsPASS
Page Weight Budget
622 KB transferred, 16 requests
622 KB transferred, 16 requests
Info::
Page weighs 673 KB (622 KB transferred)
Info::
16 HTTP requests
Info::
Estimated 0.13 g CO2 per page load
622 KB transferred
16 requests
0.13 g CO2 per page load
Images 310.3 KiB 50%
JavaScript 139.6 KiB 22%
CSS 105.1 KiB 17%
Fonts 42.4 KiB 7%
HTML 23.7 KiB 4%
Other 1.3 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+Third-Party Impact-0% third-party, 0 ms blockingPASS
Third-Party Impact
-0% third-party, 0 ms blocking
-0% third-party, 0 ms blocking
Info::
Third-party code accounts for -0% of page weight (-1 B of 622.4 KiB)
Info::
Third-party blocking time is low (0 ms)
No third-party resources detected — all resources are first-party.
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Image Optimization1 images, 0 KB saveablePASS
Image Optimization
1 images, 0 KB saveable
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 310 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+JS Execution Cost57ms total JS executionPASS
JS Execution Cost
57ms total JS execution
57ms total JS execution
Info::
https://donaubad.cloud/: 57ms CPU time
Main Thread Breakdown
Other 38% Style & Layout 27% Script Evaluation 22% Parse HTML & CSS 6% Rendering 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://donaubad.cloud/ | 57ms | 1ms | 0ms | 1st |
A+Font Loading3 fonts (42 KB)PASS
Font Loading
3 fonts (42 KB)
3 fonts (42 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
42 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
libre-franklin-latin-40... woff2 swap
Size 14 KB
Load time 44 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
libre-franklin-latin-80... woff2 swap
Size 14 KB
Load time 144 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
libre-franklin-latin-60... woff2 swap
Size 14 KB
Load time 105 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
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
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+Page Weight Inventory16 resources · 622 KB · 46 KB savings availablePASS
Page Weight Inventory
16 resources · 622 KB · 46 KB savings available
16 resources · 622 KB · 46 KB savings available
Info::
Within 1MB page-weight target
Got: 622 KB
Info::
1 third-party resources (-0% of weight)
Info::
1 resources over 200KB
16 resources · 622.4 KiB · 1 third-party Within 1MB page-weight target
Image 50% · 311.6 KiB
JavaScript 22% · 139.6 KiB
CSS 17% · 105.1 KiB
Font 7% · 42.4 KiB
Document 4% · 23.7 KiB
~45.5 KiB of savings available
Remove unused JavaScript: 45.5 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 16 resources | 622.4 KiB | ||||||
Network Waterfall16 requests over 1397msINFO
Network Waterfall
16 requests over 1397ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization1 images, 75 KB total, 0 KB wastedINFO
Image Optimization
1 images, 75 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
75 KB
1 missing alt text
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.