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.
C
Page Weight Budget
Action
1.7 MB transferred, 116 requests
REVIEW
1.7 MB transferred, 116 requests
Info::
i
Page weighs 7.8 MB (1.7 MB transferred)
Warning::
!
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Warning::
!
116 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
i
Estimated 0.36 g CO2 per page load
1.7 MBtransferred
116 requests
0.36 g CO2 per page load
JavaScript1.3 MiB76%
Images159.3 KiB9%
Fonts117.5 KiB7%
CSS99.0 KiB6%
HTML27.2 KiB2%
Other23.9 KiB1%
Other4.7 KiB0%
Other1.4 KiB0%
Other0 B0%
Other0 B0%
02.4 MB4.9 MB
Approaching limit
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
C
Image Optimization
Action
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
!
https://www.globalsign.com/images/globalsign-main.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.globalsign.com/application/files/2816/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.globalsign.com/application/files/9816/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.globalsign.com/application/files/7317/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://seal.atlas.globalsign.com/gss/one/image?p1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.globalsign.com/application/files/6916/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.globalsign.com/application/files/8016/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.globalsign.com/application/files/3416/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.globalsign.com/application/files/6517/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.globalsign.com/application/files/4316/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24images159 KB
0oversized-0 KB
9legacy format
11missing 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
Performance issues directly impact user engagement and conversion rates.
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
2 fonts (118 KB)
PASS
2 fonts (118 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
118 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time10 ms
Start791 ms
RiskFOUT — text flashes from fallback to web font
fontawesome-webfont.woff2woff2swap
Size76 KB
Load time24 ms
Start791 ms
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)
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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall
116 requests over 4788ms
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-party6258ms · 638KB · $83/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.globalsign.com
www.globalsign.com
Other
1640ms
24 KB
—
$22/mo
Costly
consent.cookiebot.com
consent.cookiebot.com
Other
1490ms
36 KB
—
$20/mo
Costly
Unattributable
Unattributable
Other
684ms
0 KB
—
$9/mo
Costly
globalsign.containers.piwik.pro
globalsign.containers.piwik.pro
Other
601ms
85 KB
34%
$8/mo
Costly
consent.cookiebot.com
consent.cookiebot.com
Other
525ms
105 KB
24%
$7/mo
Costly
apps.euw2.pure.cloud
apps.euw2.pure.cloud
Other
482ms
169 KB
52%
$6/mo
Costly
Microsoft Clarity
scripts.clarity.ms
Session Replay
289ms
26 KB
—
$4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
247ms
134 KB
52%
$3/mo
Costly
www.globalsign.com
www.globalsign.com
Other
98ms
31 KB
—
$1/mo
Optional
www.globalsign.com
www.globalsign.com
Other
80ms
3 KB
—
$1/mo
Optional
globalsign.containers.piwik.pro
globalsign.containers.piwik.pro
Other
70ms
26 KB
—
$1/mo
Optional
static.cloudflareinsights.com
static.cloudflareinsights.com
Other
52ms
0 KB
—
$1/mo
Optional
www.globalsign.com
Other
Costly
Execution1640ms
Transfer24 KB
Monthly Cost$22/mo
consent.cookiebot.com
Other
Costly
Execution1490ms
Transfer36 KB
Monthly Cost$20/mo
Unattributable
Other
Costly
Execution684ms
Transfer0 KB
Monthly Cost$9/mo
globalsign.containers.piwik.pro
Other
Costly
Execution601ms
Transfer85 KB
Unused34%
Monthly Cost$8/mo
consent.cookiebot.com
Other
Costly
Execution525ms
Transfer105 KB
Unused24%
Monthly Cost$7/mo
apps.euw2.pure.cloud
Other
Costly
Execution482ms
Transfer169 KB
Unused52%
Monthly Cost$6/mo
Microsoft Clarity
Session Replay
Costly
Execution289ms
Transfer26 KB
Monthly Cost$4/mo
Google Tag Manager
Tag Manager
Costly
Execution247ms
Transfer134 KB
Unused52%
Monthly Cost$3/mo
www.globalsign.com
Other
Optional
Execution98ms
Transfer31 KB
Monthly Cost$1/mo
www.globalsign.com
Other
Optional
Execution80ms
Transfer3 KB
Monthly Cost$1/mo
globalsign.containers.piwik.pro
Other
Optional
Execution70ms
Transfer26 KB
Monthly Cost$1/mo
static.cloudflareinsights.com
Other
Optional
Execution52ms
Transfer0 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.globalsign.com adds 1640ms and costs ~$22/month
consent.cookiebot.com adds 1490ms and costs ~$20/month
Unattributable adds 684ms and costs ~$9/month
globalsign.containers.piwik.pro adds 601ms and costs ~$8/month
consent.cookiebot.com adds 525ms and costs ~$7/month
apps.euw2.pure.cloud adds 482ms and costs ~$6/month
Microsoft Clarity adds 289ms and costs ~$4/month
Google Tag Manager adds 247ms and costs ~$3/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.globalsign.com takes 1640ms 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
consent.cookiebot.com takes 1490ms 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 684ms 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
globalsign.containers.piwik.pro takes 601ms 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
consent.cookiebot.com takes 525ms 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
apps.euw2.pure.cloud takes 482ms 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 apps.euw2.pure.cloud'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
Microsoft Clarity takes 289ms 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 247ms 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 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.