https://portnerag.ch/wp-content/uploads/2021/08/we... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-akB7Mr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-4S_81b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE--LxLh0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/ba... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/ri... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2024/09/To... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/Ge... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/gr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-6jGtfR... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/la... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-FKOCbm... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-qqozUu... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-nI5XtU... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/co... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-fl0w1z... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/09/mi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2024/09/ku... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-1D2dd3... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/mo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/si... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-o72WUJ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/ca... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2025/11/Lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-IR93q8... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/di... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2025/05/fe... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-dDlygJ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://mlb0r75bozrb.i.optimole.com/2f7lvmE-7poHaS... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://portnerag.ch/wp-content/uploads/2021/08/sw... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
34images3.5 MB
0oversized-0 KB
17legacy format
30missing dimensionsCLS risk
Set explicit width and height to prevent CLS.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
i
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.
B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main response uses gzip; brotli would be ~20% smaller
Info::
i
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
i
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.
B
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
!
23 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
!
Total JS execution time is 5.6 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
✓
Cache-Control header is set
Got: no-cache
Info::
✓
Last-Modified header present
Cache-Control
no-cache
Directive
Value
Meaning
no-cache
—
Cache but always revalidate first
A+
Third-Party Impact
10% third-party, 0 ms blocking
PASS
10% third-party, 0 ms blocking
Info::
i
Third-party code accounts for 10% of page weight (2.5 MiB of 24.8 MiB)
Info::
✓
Third-party blocking time is low (0 ms)
90%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
✓
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
15 fonts (640 KB)
PASS
15 fonts (640 KB)
Info::
i
15 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
15
640 KB total
Render-blocking
0
of 15
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
lwoff2swap
Size30 KB
Load time14 ms
Start604 ms
RiskFOUT — text flashes from fallback to web font
lwoff2swap
Size30 KB
Load time32 ms
Start605 ms
RiskFOUT — text flashes from fallback to web font
icomoon.woffwoffswap
Size114 KB
Load time94 ms
Start605 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time42 ms
Start606 ms
RiskFOUT — text flashes from fallback to web font
tatsu-icons.ttfttfswap
Size164 KB
Load time97 ms
Start606 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
lwoff2swap
Size33 KB
Load time24 ms
Start916 ms
RiskFOUT — text flashes from fallback to web font
helveticaroundedltstd-b...woff2swap
Size18 KB
Load time40 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
MenschRegular.woffwoffswap
Size15 KB
Load time41 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
MenschBold.woffwoffswap
Size13 KB
Load time39 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
lwoff2swap
Size0 KB
Load time9 ms
Start2.1 s
RiskFOUT — text flashes from fallback to web font
i7dOIFdwYjGaAMFtZd_QA1Z...woff2swap
Size31 KB
Load time29 ms
Start2.2 s
RiskFOUT — text flashes from fallback to web font
modules.woffwoffswap
Size90 KB
Load time50 ms
Start2.2 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time88 ms
Start2.8 s
RiskFOUT — text flashes from fallback to web font
mem8Ya6iyW-Lwqg40ZMFVZ0...woff2swap
Size13 KB
Load time29 ms
Start2.9 s
RiskFOUT — text flashes from fallback to web font
mem_Ya6iyW-LwqgwarYQeL8...woff2swap
Size12 KB
Load time28 ms
Start2.9 s
RiskFOUT — 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)
Fixing the unchecked items could save ~258 KB and ~516 ms
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
✓
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
✓
No render-blocking resources detected
A+
Resource Hints
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
✓
Page uses 1 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch
1
prefetch—
1 resource hints configured
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
✓
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
✓
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
!
Compressed response missing `Vary` header
The page is served with `Content-Encoding: gzip` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
✓
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall
154 requests over 3549ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
43%of JavaScript execution is third-party
First-party Third-party2430ms · 466KB · CHF12/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.gstatic.com
www.gstatic.com
Other
1282ms
0 KB
44%
CHF6/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
373ms
175 KB
40%
CHF2/mo
Costly
bestellen.portnerag.ch
bestellen.portnerag.ch
Other
294ms
55 KB
65%
CHF1/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
242ms
161 KB
42%
CHF1/mo
Costly
bestellen.portnerag.ch
bestellen.portnerag.ch
Other
92ms
29 KB
—
CHF0/mo
Optional
bestellen.portnerag.ch
bestellen.portnerag.ch
Other
82ms
25 KB
—
CHF0/mo
Optional
Google Analytics
www.google-analytics.com
Analytics
65ms
21 KB
—
CHF0/mo
Optional
www.gstatic.com
Other
Costly
Execution1282ms
Transfer0 KB
Unused44%
Monthly CostCHF6/mo
Google Tag Manager
Tag Manager
Costly
Execution373ms
Transfer175 KB
Unused40%
Monthly CostCHF2/mo
bestellen.portnerag.ch
Other
Costly
Execution294ms
Transfer55 KB
Unused65%
Monthly CostCHF1/mo
Google Tag Manager
Tag Manager
Costly
Execution242ms
Transfer161 KB
Unused42%
Monthly CostCHF1/mo
bestellen.portnerag.ch
Other
Optional
Execution92ms
Transfer29 KB
Monthly CostCHF0/mo
bestellen.portnerag.ch
Other
Optional
Execution82ms
Transfer25 KB
Monthly CostCHF0/mo
Google Analytics
Analytics
Optional
Execution65ms
Transfer21 KB
Monthly CostCHF0/mo
These scripts may cost more than they're worth
www.gstatic.com adds 1282ms and costs ~CHF6/month
Google Tag Manager adds 373ms and costs ~CHF2/month
bestellen.portnerag.ch adds 294ms and costs ~CHF1/month
Google Tag Manager adds 242ms and costs ~CHF1/month
43% of JavaScript execution time comes from third-party scripts.
Why this matters
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
www.gstatic.com takes 1282ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 373ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
bestellen.portnerag.ch takes 294ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
65% of bestellen.portnerag.ch's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 242ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
375 ms
2.6 s
3.0 s