Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document 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.
C
Asset Compression
Action
1 of 2 asset hosts serve text uncompressed
REVIEW
1 of 2 asset hosts serve text uncompressed
Warning::
!
wds.ace.teliacompany.com serves text assets uncompressed (assets: 5)
The sampled response carries a text content type but no Content-Encoding, so the bytes go over the wire raw. Text compression typically removes 70-80% of a JS or CSS payload -- this is the single cheapest transfer win available on this host.
Got: wds.ace.teliacompany.com (text/css)
Info::
i
www.googletagmanager.com serves assets with gzip; brotli would be ~20% smaller (assets: 3)
Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.
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::
!
4 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 7.4 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.
A
Third-Party Impact
37% third-party, 0 ms blocking
PASS
37% third-party, 0 ms blocking
Info::
i
Third-party code accounts for 37% of page weight (1.8 MiB of 5.0 MiB)
Info::
✓
Third-party blocking time is low (0 ms)
63%
37%
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
Image Optimization
9 images, 0 KB saveable
PASS
9 images, 0 KB saveable
Warning::
!
https://www.riksbyggen.se/images/svg/riksbyggen_lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
9images249 KB
0oversized-0 KB
2legacy format
1missing 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
A+
Font Loading
4 fonts (2281 KB)
PASS
4 fonts (2281 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
2281 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
UnitWebRBW03Medium.woffwoffswap
Size64 KB
Load time127 ms
Start301 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
UnitWebRBW03Light.woffwoffswap
Size62 KB
Load time133 ms
Start302 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
MaterialSymbolsRoundedC...woff2swap
Size2142 KB
Load time587 ms
Start302 ms
RiskFOUT — text flashes from fallback to web font
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
memSYaGs126MiZpBA-UvWbX...woff2swap
Size14 KB
Load time138 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)
Fixing the unchecked items could save ~1109 KB and ~2218 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
✓
Page uses 4 resource hint(s)
Current Resource Hints
preconnect—
preload
4
dns-prefetch—
prefetch—
4 resource hints configured
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
✓
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
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-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
✓
Main HTML uses no-store -- correct for sensitive/dynamic content
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
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.
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
135 requests over 4477ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
54%of JavaScript execution is third-party
First-party Third-party3969ms · 1349KB · kr431/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
wds.ace.teliacompany.com
wds.ace.teliacompany.com
Other
778ms
184 KB
76%
kr84/mo
Costly
consent.cookiebot.com
consent.cookiebot.com
Other
771ms
381 KB
13%
kr84/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
540ms
186 KB
43%
kr59/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
463ms
185 KB
41%
kr50/mo
Costly
consent.cookiebot.com
consent.cookiebot.com
Other
294ms
37 KB
64%
kr32/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
263ms
186 KB
40%
kr29/mo
Costly
collect.mopinion.com
collect.mopinion.com
Other
254ms
71 KB
51%
kr28/mo
Costly
wds.ace.teliacompany.com
wds.ace.teliacompany.com
Other
237ms
58 KB
47%
kr26/mo
Costly
deploy.mopinion.com
deploy.mopinion.com
Other
179ms
14 KB
—
kr19/mo
Optional
cdn.ontame.io
cdn.ontame.io
Other
77ms
26 KB
—
kr8/mo
Optional
wds.ace.teliacompany.com
wds.ace.teliacompany.com
Other
60ms
18 KB
—
kr7/mo
Optional
cdn.ontame.io
cdn.ontame.io
Other
53ms
2 KB
—
kr6/mo
Optional
wds.ace.teliacompany.com
Other
Costly
Execution778ms
Transfer184 KB
Unused76%
Monthly Costkr84/mo
consent.cookiebot.com
Other
Costly
Execution771ms
Transfer381 KB
Unused13%
Monthly Costkr84/mo
Google Tag Manager
Tag Manager
Costly
Execution540ms
Transfer186 KB
Unused43%
Monthly Costkr59/mo
Google Tag Manager
Tag Manager
Costly
Execution463ms
Transfer185 KB
Unused41%
Monthly Costkr50/mo
consent.cookiebot.com
Other
Costly
Execution294ms
Transfer37 KB
Unused64%
Monthly Costkr32/mo
Google Tag Manager
Tag Manager
Costly
Execution263ms
Transfer186 KB
Unused40%
Monthly Costkr29/mo
collect.mopinion.com
Other
Costly
Execution254ms
Transfer71 KB
Unused51%
Monthly Costkr28/mo
wds.ace.teliacompany.com
Other
Costly
Execution237ms
Transfer58 KB
Unused47%
Monthly Costkr26/mo
deploy.mopinion.com
Other
Optional
Execution179ms
Transfer14 KB
Monthly Costkr19/mo
cdn.ontame.io
Other
Optional
Execution77ms
Transfer26 KB
Monthly Costkr8/mo
wds.ace.teliacompany.com
Other
Optional
Execution60ms
Transfer18 KB
Monthly Costkr7/mo
cdn.ontame.io
Other
Optional
Execution53ms
Transfer2 KB
Monthly Costkr6/mo
These scripts may cost more than they're worth
wds.ace.teliacompany.com adds 778ms and costs ~kr84/month
consent.cookiebot.com adds 771ms and costs ~kr84/month
Google Tag Manager adds 540ms and costs ~kr59/month
Google Tag Manager adds 463ms and costs ~kr50/month
consent.cookiebot.com adds 294ms and costs ~kr32/month
Google Tag Manager adds 263ms and costs ~kr29/month
collect.mopinion.com adds 254ms and costs ~kr28/month
wds.ace.teliacompany.com adds 237ms and costs ~kr26/month
54% 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
wds.ace.teliacompany.com takes 778ms 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 wds.ace.teliacompany.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
consent.cookiebot.com takes 771ms 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 540ms 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 463ms 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 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
64% of consent.cookiebot.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 263ms 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
collect.mopinion.com takes 254ms 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 collect.mopinion.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
wds.ace.teliacompany.com takes 237ms 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.