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.
B
Image Optimization
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Info::
✓
All images are well-optimized
21images342 KB
0oversized-0 KB
4legacy format
0missing dimensionsCLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
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
4 fonts (90 KB)
PASS
4 fonts (90 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
90 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
SuisseIntl-Regular-WebS...woff2swap
Size20 KB
Load time28 ms
Start281 ms
RiskFOUT — text flashes from fallback to web font
SuisseIntl-Regular-WebS...woffswap
Size24 KB
Load time29 ms
Start282 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
SuisseIntl-Bold-WebS.woff2woff2swap
Size21 KB
Load time30 ms
Start282 ms
RiskFOUT — text flashes from fallback to web font
SuisseIntl-Bold-WebS.woffwoffswap
Size25 KB
Load time32 ms
Start282 ms
RiskFOUT — text flashes from fallback to web font
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 ~15 KB and ~30 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
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
✓
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
98 requests over 2415ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100%of JavaScript execution is third-party
First-party Third-party5622ms · 2824KB · CHF89/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.sgs.com
www.sgs.com
Other
909ms
80 KB
59%
CHF14/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
742ms
178 KB
29%
CHF12/mo
Costly
Unattributable
Unattributable
Other
515ms
0 KB
—
CHF8/mo
Costly
www.sgs.com
www.sgs.com
Other
501ms
4 KB
—
CHF8/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
357ms
179 KB
28%
CHF6/mo
Costly
OneTrust
cdn.cookielaw.org
Consent
295ms
124 KB
52%
CHF5/mo
Essential
www.sgs.com
www.sgs.com
Other
235ms
511 KB
85%
CHF4/mo
Costly
www.sgs.com
www.sgs.com
Other
201ms
46 KB
—
CHF3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
161ms
144 KB
49%
CHF3/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
160ms
147 KB
47%
CHF3/mo
Optional
www.sgs.com
www.sgs.com
Other
160ms
215 KB
51%
CHF3/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
159ms
169 KB
40%
CHF3/mo
Optional
www.sgs.com
www.sgs.com
Other
135ms
35 KB
—
CHF2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
134ms
137 KB
46%
CHF2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
134ms
134 KB
56%
CHF2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
131ms
146 KB
46%
CHF2/mo
Optional
www.sgs.com
www.sgs.com
Other
124ms
191 KB
51%
CHF2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
119ms
130 KB
50%
CHF2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
117ms
137 KB
47%
CHF2/mo
Optional
www.sgs.com
www.sgs.com
Other
85ms
13 KB
—
CHF1/mo
Optional
www.sgs.com
www.sgs.com
Other
70ms
15 KB
—
CHF1/mo
Optional
www.sgs.com
www.sgs.com
Other
69ms
24 KB
—
CHF1/mo
Optional
s.go-mpulse.net
s.go-mpulse.net
Other
54ms
57 KB
56%
CHF1/mo
Optional
OneTrust
cdn.cookielaw.org
Consent
54ms
9 KB
—
CHF1/mo
Essential
www.sgs.com
Other
Costly
Execution909ms
Transfer80 KB
Unused59%
Monthly CostCHF14/mo
Google Tag Manager
Tag Manager
Costly
Execution742ms
Transfer178 KB
Unused29%
Monthly CostCHF12/mo
Unattributable
Other
Costly
Execution515ms
Transfer0 KB
Monthly CostCHF8/mo
www.sgs.com
Other
Costly
Execution501ms
Transfer4 KB
Monthly CostCHF8/mo
Google Tag Manager
Tag Manager
Costly
Execution357ms
Transfer179 KB
Unused28%
Monthly CostCHF6/mo
OneTrust
Consent
Essential
Execution295ms
Transfer124 KB
Unused52%
Monthly CostCHF5/mo
www.sgs.com
Other
Costly
Execution235ms
Transfer511 KB
Unused85%
Monthly CostCHF4/mo
www.sgs.com
Other
Costly
Execution201ms
Transfer46 KB
Monthly CostCHF3/mo
Google Tag Manager
Tag Manager
Optional
Execution161ms
Transfer144 KB
Unused49%
Monthly CostCHF3/mo
Google Tag Manager
Tag Manager
Optional
Execution160ms
Transfer147 KB
Unused47%
Monthly CostCHF3/mo
www.sgs.com
Other
Optional
Execution160ms
Transfer215 KB
Unused51%
Monthly CostCHF3/mo
Google Tag Manager
Tag Manager
Optional
Execution159ms
Transfer169 KB
Unused40%
Monthly CostCHF3/mo
www.sgs.com
Other
Optional
Execution135ms
Transfer35 KB
Monthly CostCHF2/mo
Google Tag Manager
Tag Manager
Optional
Execution134ms
Transfer137 KB
Unused46%
Monthly CostCHF2/mo
Google Tag Manager
Tag Manager
Optional
Execution134ms
Transfer134 KB
Unused56%
Monthly CostCHF2/mo
Google Tag Manager
Tag Manager
Optional
Execution131ms
Transfer146 KB
Unused46%
Monthly CostCHF2/mo
www.sgs.com
Other
Optional
Execution124ms
Transfer191 KB
Unused51%
Monthly CostCHF2/mo
Google Tag Manager
Tag Manager
Optional
Execution119ms
Transfer130 KB
Unused50%
Monthly CostCHF2/mo
Google Tag Manager
Tag Manager
Optional
Execution117ms
Transfer137 KB
Unused47%
Monthly CostCHF2/mo
www.sgs.com
Other
Optional
Execution85ms
Transfer13 KB
Monthly CostCHF1/mo
www.sgs.com
Other
Optional
Execution70ms
Transfer15 KB
Monthly CostCHF1/mo
www.sgs.com
Other
Optional
Execution69ms
Transfer24 KB
Monthly CostCHF1/mo
s.go-mpulse.net
Other
Optional
Execution54ms
Transfer57 KB
Unused56%
Monthly CostCHF1/mo
OneTrust
Consent
Essential
Execution54ms
Transfer9 KB
Monthly CostCHF1/mo
These scripts may cost more than they're worth
www.sgs.com adds 909ms and costs ~CHF14/month
Google Tag Manager adds 742ms and costs ~CHF12/month
Unattributable adds 515ms and costs ~CHF8/month
www.sgs.com adds 501ms and costs ~CHF8/month
Google Tag Manager adds 357ms and costs ~CHF6/month
www.sgs.com adds 235ms and costs ~CHF4/month
www.sgs.com adds 201ms and costs ~CHF3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
Why this matters
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.sgs.com takes 909ms 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
59% of www.sgs.com'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 742ms 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
Unattributable takes 515ms 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
www.sgs.com takes 501ms 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 357ms 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
52% of OneTrust'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
www.sgs.com takes 235ms 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
85% of www.sgs.com'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
www.sgs.com takes 201ms 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
51% of www.sgs.com'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
56% of Google Tag Manager'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
51% of www.sgs.com'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
56% of s.go-mpulse.net'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.