JavaScript is 959 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 959 KB
Info::
i
65 HTTP requests
Info::
i
Estimated 0.28 g CO2 per page load
1.3 MBtransferred
65 requests
0.28 g CO2 per page load
JavaScript958.7 KiB70%
Images232.1 KiB17%
HTML70.8 KiB5%
Fonts64.1 KiB5%
CSS19.8 KiB1%
Other8.0 KiB1%
Other3.5 KiB0%
Other1.8 KiB0%
Other1.4 KiB0%
Other260 B0%
02.4 MB4.9 MB
Under budget
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
B
Image Optimization
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Info::
✓
All images are well-optimized
10images232 KB
0oversized-0 KB
4legacy format
0missing dimensionsCLS risk
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 (64 KB)
PASS
2 fonts (64 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
64 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
figtree-variable.ttfttfswap
Size36 KB
Load time595 ms
Start244 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
stolzl-regular.woff2woff2swap
Size28 KB
Load time593 ms
Start244 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)
Fixing the unchecked items could save ~11 KB and ~22 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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
✓
Page uses 3 resource hint(s)
Current Resource Hints
preconnect—
preload
3
dns-prefetch—
prefetch—
3 resource hints configured
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
A
HTTP Caching
max-age=14400 (4 hours)
PASS
max-age=14400 (4 hours)
Info::
✓
Cache-Control header is set
Got: public, max-age=14400
Info::
✓
Effective TTL: 4 hours (max-age=14400)
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
public, max-age=14400
Directive
Value
Meaning
public
—
Any cache may store this response
max-age
14400
Cache for 4 hours
Effective TTL: 14400 seconds
Network Waterfall
65 requests over 3748ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
83%of JavaScript execution is third-party
First-party Third-party3095ms · 790KB · €54/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
Unattributable
Unattributable
Other
524ms
0 KB
—
€9/mo
Costly
static.buffer.com
static.buffer.com
Other
501ms
45 KB
—
€9/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
329ms
125 KB
49%
€6/mo
Costly
Microsoft Clarity
scripts.clarity.ms
Session Replay
235ms
26 KB
—
€4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
228ms
151 KB
43%
€4/mo
Costly
static.buffer.com
static.buffer.com
Other
200ms
11 KB
—
€3/mo
Costly
Facebook Pixel
connect.facebook.net
Advertising
186ms
97 KB
35%
€3/mo
Optional
cdn-cookieyes.com
cdn-cookieyes.com
Other
160ms
8 KB
—
€3/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
156ms
45 KB
—
€3/mo
Optional
static.buffer.com
static.buffer.com
Other
133ms
79 KB
57%
€2/mo
Optional
static.buffer.com
static.buffer.com
Other
124ms
40 KB
54%
€2/mo
Optional
www.datadoghq-browser-agent.com
www.datadoghq-browser-agent.com
Other
99ms
22 KB
—
€2/mo
Optional
LinkedIn Insight
snap.licdn.com
Advertising
83ms
19 KB
—
€1/mo
Optional
static.buffer.com
static.buffer.com
Other
78ms
121 KB
80%
€1/mo
Optional
segment-analytics.buffer.com
segment-analytics.buffer.com
Other
59ms
1 KB
—
€1/mo
Optional
Unattributable
Other
Costly
Execution524ms
Transfer0 KB
Monthly Cost€9/mo
static.buffer.com
Other
Costly
Execution501ms
Transfer45 KB
Monthly Cost€9/mo
Google Tag Manager
Tag Manager
Costly
Execution329ms
Transfer125 KB
Unused49%
Monthly Cost€6/mo
Microsoft Clarity
Session Replay
Costly
Execution235ms
Transfer26 KB
Monthly Cost€4/mo
Google Tag Manager
Tag Manager
Costly
Execution228ms
Transfer151 KB
Unused43%
Monthly Cost€4/mo
static.buffer.com
Other
Costly
Execution200ms
Transfer11 KB
Monthly Cost€3/mo
Facebook Pixel
Advertising
Optional
Execution186ms
Transfer97 KB
Unused35%
Monthly Cost€3/mo
cdn-cookieyes.com
Other
Optional
Execution160ms
Transfer8 KB
Monthly Cost€3/mo
Facebook Pixel
Advertising
Optional
Execution156ms
Transfer45 KB
Monthly Cost€3/mo
static.buffer.com
Other
Optional
Execution133ms
Transfer79 KB
Unused57%
Monthly Cost€2/mo
static.buffer.com
Other
Optional
Execution124ms
Transfer40 KB
Unused54%
Monthly Cost€2/mo
www.datadoghq-browser-agent.com
Other
Optional
Execution99ms
Transfer22 KB
Monthly Cost€2/mo
LinkedIn Insight
Advertising
Optional
Execution83ms
Transfer19 KB
Monthly Cost€1/mo
static.buffer.com
Other
Optional
Execution78ms
Transfer121 KB
Unused80%
Monthly Cost€1/mo
segment-analytics.buffer.com
Other
Optional
Execution59ms
Transfer1 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
Unattributable adds 524ms and costs ~€9/month
static.buffer.com adds 501ms and costs ~€9/month
Google Tag Manager adds 329ms and costs ~€6/month
Microsoft Clarity adds 235ms and costs ~€4/month
Google Tag Manager adds 228ms and costs ~€4/month
static.buffer.com adds 200ms and costs ~€3/month
83% 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
Unattributable takes 524ms 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
static.buffer.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 329ms 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
Microsoft Clarity 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
Google Tag Manager takes 228ms 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
static.buffer.com takes 200ms 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
57% of static.buffer.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
54% of static.buffer.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
80% of static.buffer.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.