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
Image Optimization
Action
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Warning::
!
https://g.acdn.no/obscura/API/image/r1/zett/364x30... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://r.api.no/local/v3/publications/www.bodonu.... 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.
22images544 KB
0oversized-0 KB
5legacy format
3missing 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
Performance issues directly impact user engagement and conversion rates.
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.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
i
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.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
i
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.
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::
!
2 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 5.2 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
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
11 fonts (321 KB)
PASS
11 fonts (321 KB)
Info::
i
11 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
11
321 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
OpenSans400.woff2woff2swap
Size12 KB
Load time49 ms
Start920 ms
RiskFOUT — text flashes from fallback to web font
national-2-regular.woff2woff2swap
Size34 KB
Load time52 ms
Start976 ms
RiskFOUT — text flashes from fallback to web font
national-2-bold.woff2woff2swap
Size36 KB
Load time95 ms
Start976 ms
RiskFOUT — text flashes from fallback to web font
national-2-narrow-bold....woff2swap
Size35 KB
Load time73 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
national-2-narrow-extra...woff2swap
Size35 KB
Load time64 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
national-2-medium.woff2woff2swap
Size36 KB
Load time95 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
OpenSans700.woff2woff2swap
Size12 KB
Load time51 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
6xK3dSBYKcSV-LCoeQqfX1R...woff2swap
Size15 KB
Load time54 ms
Start1.7 s
RiskFOUT — text flashes from fallback to web font
national-2-bold.woff2woff2swap
Size36 KB
Load time235 ms
Start2.6 s
RiskFOUT — text flashes from fallback to web font
national-2-regular.woff2woff2swap
Size34 KB
Load time192 ms
Start2.6 s
RiskFOUT — text flashes from fallback to web font
national-2-medium.woff2woff2swap
Size36 KB
Load time191 ms
Start2.6 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)
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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
✓
Page uses 4 resource hint(s)
Current Resource Hints
preconnect
4
preload—
dns-prefetch—
prefetch—
4 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+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
i
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.
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
185 requests over 3006ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
76%of JavaScript execution is third-party
First-party Third-party3945ms · 736KB · kr487/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
assets.acdn.no
assets.acdn.no
Other
1190ms
45 KB
64%
kr147/mo
Costly
www.bodonu.no
www.bodonu.no
Other
813ms
75 KB
—
kr100/mo
Costly
assets.acdn.no
assets.acdn.no
Other
313ms
29 KB
—
kr39/mo
Costly
assets.acdn.no
assets.acdn.no
Other
220ms
9 KB
—
kr27/mo
Costly
assets.acdn.no
assets.acdn.no
Other
219ms
17 KB
—
kr27/mo
Costly
assets.acdn.no
assets.acdn.no
Other
211ms
2 KB
—
kr26/mo
Costly
sp.api.no
sp.api.no
Other
188ms
0 KB
—
kr23/mo
Optional
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
165ms
187 KB
76%
kr20/mo
Optional
content.lwadm.com
content.lwadm.com
Other
139ms
130 KB
81%
kr17/mo
Optional
assets.acdn.no
assets.acdn.no
Other
109ms
15 KB
—
kr13/mo
Optional
assets.acdn.no
assets.acdn.no
Other
107ms
132 KB
72%
kr13/mo
Optional
content.lwadm.com
content.lwadm.com
Other
106ms
38 KB
74%
kr13/mo
Optional
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
84ms
34 KB
—
kr10/mo
Optional
assets.acdn.no
assets.acdn.no
Other
79ms
22 KB
—
kr10/mo
Optional
assets.acdn.no
Other
Costly
Execution1190ms
Transfer45 KB
Unused64%
Monthly Costkr147/mo
www.bodonu.no
Other
Costly
Execution813ms
Transfer75 KB
Monthly Costkr100/mo
assets.acdn.no
Other
Costly
Execution313ms
Transfer29 KB
Monthly Costkr39/mo
assets.acdn.no
Other
Costly
Execution220ms
Transfer9 KB
Monthly Costkr27/mo
assets.acdn.no
Other
Costly
Execution219ms
Transfer17 KB
Monthly Costkr27/mo
assets.acdn.no
Other
Costly
Execution211ms
Transfer2 KB
Monthly Costkr26/mo
sp.api.no
Other
Optional
Execution188ms
Transfer0 KB
Monthly Costkr23/mo
securepubads.g.doubleclick.net
Other
Optional
Execution165ms
Transfer187 KB
Unused76%
Monthly Costkr20/mo
content.lwadm.com
Other
Optional
Execution139ms
Transfer130 KB
Unused81%
Monthly Costkr17/mo
assets.acdn.no
Other
Optional
Execution109ms
Transfer15 KB
Monthly Costkr13/mo
assets.acdn.no
Other
Optional
Execution107ms
Transfer132 KB
Unused72%
Monthly Costkr13/mo
content.lwadm.com
Other
Optional
Execution106ms
Transfer38 KB
Unused74%
Monthly Costkr13/mo
securepubads.g.doubleclick.net
Other
Optional
Execution84ms
Transfer34 KB
Monthly Costkr10/mo
assets.acdn.no
Other
Optional
Execution79ms
Transfer22 KB
Monthly Costkr10/mo
These scripts may cost more than they're worth
assets.acdn.no adds 1190ms and costs ~kr147/month
www.bodonu.no adds 813ms and costs ~kr100/month
assets.acdn.no adds 313ms and costs ~kr39/month
assets.acdn.no adds 220ms and costs ~kr27/month
assets.acdn.no adds 219ms and costs ~kr27/month
assets.acdn.no adds 211ms and costs ~kr26/month
76% 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
assets.acdn.no takes 1190ms 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
64% of assets.acdn.no'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.bodonu.no takes 813ms 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
assets.acdn.no takes 313ms 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
assets.acdn.no takes 220ms 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
assets.acdn.no takes 219ms 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
assets.acdn.no takes 211ms 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
76% of securepubads.g.doubleclick.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.
Source: web.dev
81% of content.lwadm.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
72% of assets.acdn.no'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
74% of content.lwadm.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.