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https://casinonsvenska.eu

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

89

GRADE

B

FIX

0

REVIEW

5

PASS

10

INFO

2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

98

Performance

73

Accessibility

88

Best Practices

75

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.79 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.79 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

54 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.047

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.96 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

3.46 s

Page Load Progression

403 ms

806 ms

1.2 s

1.6 s

2.0 s

2.4 s

2.8 s

3.2 s

Checks

17

10 PASS 5 REVIEW

B

Third-Party Impact

41% third-party, 0 ms blocking

REVIEW

41% third-party, 0 ms blocking

Third-party code accounts for 41% of page weight (148.7 KiB of 363.3 KiB)

Third-party blocking time is low (0 ms)

59%

41%

First-party Third-party

C

Image Optimization

Action

17 images, 0 KB saveable

REVIEW

17 images, 0 KB saveable

https://casinonsvenska.eu/wp-content/webp-express/... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://casinonsvenska.eu/wp-content/webp-express/... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://casinonsvenska.eu/wp-content/webp-express/... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQAB... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://casinonsvenska.eu/wp-content/webp-express/... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://casinonsvenska.eu/wp-content/webp-express/... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://casinonsvenska.eu/wp-content/webp-express/... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

17 images 68 KB

0 oversized -0 KB

4 legacy format

8 missing dimensions CLS 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

Performance issues directly impact user engagement and conversion rates.

C

JS Execution Cost

Action

1490ms total JS execution

REVIEW

1490ms total JS execution

https://casinonsvenska.eu/: 772ms CPU time

https://casinonsvenska.eu/static/js/separate-js/jq...: 225ms CPU time

Unattributable: 202ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-4D0G...: 190ms CPU time

https://casinonsvenska.eu/wp-content/plugins/webp-...: 100ms CPU time

Third-party scripts: 393ms (26% of total)

Main Thread Breakdown

Other 30% Script Evaluation 24% Rendering 20% Style & Layout 18% Script Parsing & Compilation 5%

Script	Total	Scripting	Parse/Compile	Party
https://casinonsvenska.eu/	772ms	7ms	2ms	1st
https://casinonsvenska.eu/static/js/separate-js/jquery-2.2.4.min.js?ver=4.7.3	225ms	154ms	7ms	1st
Unattributable	202ms	6ms	0ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-4D0GF5FH6Z	190ms	149ms	41ms	3rd
https://casinonsvenska.eu/wp-content/plugins/webp-express/js/lazysizes.min.js	100ms	30ms	1ms	1st

B

JS Bundles

15 scripts, 63 KB unused

REVIEW

15 scripts, 63 KB unused

https://www.googletagmanager.com/gtag/js?id=G-4D0G...: 63 KB unused (43%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 63 KB

63 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtag/js?id=G-4D0GF5FH6Z	146 KB	63 KB (43%)	✓	3rd
https://casinonsvenska.eu/static/js/separate-js/jquery.fancybox-media.js?ver=4.7.3	3 KB	—	✓	1st
https://casinonsvenska.eu/static/js/main.js?ver=4.7.3	2 KB	—	✓	1st
https://casinonsvenska.eu/static/js/separate-js/jquery.lazy.min.js?ver=4.7.3	3 KB	—	✓	1st
https://casinonsvenska.eu/static/js/separate-js/slick.min.js?ver=4.7.3	13 KB	—	✓	1st
https://casinonsvenska.eu/static/js/separate-js/jquery.fancybox.pack.js?ver=4.7.3	10 KB	—	✓	1st
https://casinonsvenska.eu/static/js/separate-js/jquery-2.2.4.min.js?ver=4.7.3	34 KB	—	✓	1st
https://casinonsvenska.eu/static/js/separate-js/user.js?ver=4.7.3	4 KB	—	✓	1st
https://casinonsvenska.eu/static/js/separate-js/bs-components.js?ver=4.7.3	5 KB	—	✓	1st
https://casinonsvenska.eu/wp-content/plugins/comment-validation/jquery.validate.pack.js?ver=4.7.3	8 KB	—	✓	1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Page Weight Budget

363 KB transferred, 39 requests

PASS

363 KB transferred, 39 requests

Page weighs 1007 KB (363 KB transferred)

39 HTTP requests

Estimated 0.07 g CO2 per page load

363 KB transferred

39 requests

0.07 g CO2 per page load

JavaScript 239.7 KiB 66%

Images 68.4 KiB 19%

CSS 32.9 KiB 9%

HTML 18.2 KiB 5%

Other 2.1 KiB 1%

Other 1.4 KiB 0%

Other 550 B 0%

0 2.4 MB 4.9 MB

Under budget

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

1 hints, 0 missing preconnects

PASS

1 hints, 0 missing preconnects

Page uses 1 resource hint(s)

Current Resource Hints

preconnect

—

preload

—

dns-prefetch

1

prefetch

—

1 resource hints configured

A

Page Weight Inventory

39 resources · 363 KB · 63 KB savings available

PASS

39 resources · 363 KB · 63 KB savings available

Within 1MB page-weight target

Got: 363 KB

~63 KB of savings available

5 third-party resources (41% of weight)

39 resources · 363.3 KiB · 5 third-party Within 1MB page-weight target

JavaScript 66% · 239.7 KiB

Image 19% · 70.5 KiB

CSS 9% · 32.9 KiB

Document 5% · 18.2 KiB

Other 1% · 1.9 KiB

~63.2 KiB of savings available

Remove unused JavaScript: 63.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

39 resources			363.3 KiB

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

A

HTTP Caching

max-age=3 (3 seconds)

PASS

max-age=3 (3 seconds)

Cache-Control header is set

Got: max-age=3, must-revalidate

Effective TTL: 3 seconds (max-age=3)

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

max-age=3, must-revalidate

Directive	Value	Meaning
max-age	3	Cache for 3 seconds
must-revalidate	—	Must recheck with server after expiry

Effective TTL: 3 seconds

Network Waterfall

39 requests over 2820ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

26% of JavaScript execution is third-party

First-party Third-party 393ms · 146KB · €4/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	202ms	0 KB	—	€2/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	190ms	146 KB	43%	€2/mo	Optional

Unattributable

Other

Costly

Execution 202ms

Transfer 0 KB

Monthly Cost €2/mo

Google Tag Manager

Tag Manager

Optional

Execution 190ms

Transfer 146 KB

Unused 43%

Monthly Cost €2/mo

These scripts may cost more than they're worth

Unattributable adds 202ms and costs ~€2/month

Unattributable takes 202ms 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

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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