Performance

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

Best Practices

100

SEO

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

1.13 s

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

1.26 s

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

22 ms

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

0.001

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

1.13 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.

1.82 s

Page Load Progression

375 ms

750 ms

1.1 s

1.5 s

1.9 s

2.2 s

2.6 s

3.0 s

Checks

9 PASS 9 REVIEW 2 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (1.3 MiB of 1.3 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

HTTP Caching

Action

No cache headers

FIX

No cache headers

No Cache-Control header found

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.

Page Weight Budget

1.3 MB transferred, 71 requests

REVIEW

1.3 MB transferred, 71 requests

Page weighs 2.5 MB (1.3 MB transferred)

71 HTTP requests

Estimated 0.26 g CO2 per page load

1.3 MB transferred

71 requests

0.26 g CO2 per page load

Images 733.8 KiB 57%

JavaScript 426.1 KiB 33%

CSS 44.1 KiB 3%

Fonts 38.4 KiB 3%

HTML 35.9 KiB 3%

Other 1.1 KiB 0%

Other 592 B 0%

Other 496 B 0%

0 2.4 MB 4.9 MB

Under budget

Image Optimization

19 images, 0 KB saveable

REVIEW

19 images, 0 KB saveable

https://www.toplista.it/wp-content/uploads/2022/03... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://www.toplista.it/wp-content/uploads/2022/03... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

19 images 734 KB

0 oversized -0 KB

3 legacy format

2 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

JS Bundles

Action

21 scripts, 157 KB unused

REVIEW

21 scripts, 157 KB unused

https://www.googletagmanager.com/gtm.js?id=GTM-M7T...: 90 KB unused (58%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=G-H69T...: 67 KB unused (36%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 157 KB

157 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtm.js?id=GTM-M7T7XF9	156 KB	90 KB (58%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-H69TWWZGRW&cx=c&gtm=4e6b41h1	187 KB	67 KB (36%)	✓	3rd
https://www.toplista.it/wp-content/plugins/wp-review/public/js/js.cookie.min.js?ver=2.1.4	1 KB	—	✓	3rd
https://www.toplista.it/wp-includes/js/underscore.min.js?ver=1.13.7	7 KB	—	✓	3rd
https://www.toplista.it/wp-content/plugins/contact-form-7/includes/swv/js/index.js?ver=6.1.4	3 KB	—	✓	3rd
https://www.toplista.it/wp-content/plugins/contact-form-7/includes/js/index.js?ver=6.1.4	4 KB	—	✓	3rd
https://www.toplista.it/wp-content/plugins/tabelle/assets/js/summary-stats.js?ver=1.0	1 KB	—	✓	3rd
https://www.toplista.it/wp-content/plugins/table-of-contents-plus2/front.min.js?ver=2411.1	2 KB	—	✓	3rd
https://www.toplista.it/wp-content/plugins/webp-image-optimizer/js/webp-optimizer.js?ver=1.0.1	1 KB	—	✓	3rd
https://www.toplista.it/wp-content/themes/kadence/assets/js/navigation.min.js?ver=1.2.21	5 KB	—	✓	3rd

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

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

HTTP/3 (QUIC)

HTTP/3 not advertised

REVIEW

HTTP/3 not advertised

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.

Document Compression

Action

Document response served uncompressed

REVIEW

Document response served uncompressed

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.

Main HTML Cache-Control

No Cache-Control header on main HTML response

REVIEW

No Cache-Control header on main HTML response

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.

Server-Timing Observability

No Server-Timing header found

REVIEW

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.

Page Weight Inventory

Action

71 resources · 1.3 MB · 157 KB savings available

REVIEW

71 resources · 1.3 MB · 157 KB savings available

Page weight 1.3 MB exceeds 1 MB target by 256 KB

Got: 1.3 MB Expected: ≤ 1 MB

~157 KB of savings available

70 third-party resources (100% of weight)

71 resources · 1.3 MiB · 70 third-party 256.5 KiB over 1MB target

Image 57% · 734.7 KiB

JavaScript 33% · 426.1 KiB

CSS 3% · 44.1 KiB

Font 3% · 38.4 KiB

Document 3% · 36.1 KiB

Other 0% · 1.0 KiB

~157.1 KiB of savings available

Remove unused JavaScript: 157.1 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

71 resources			1.3 MiB

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

All text resources are properly compressed.

A+

JS Execution Cost

359ms total JS execution

PASS

359ms total JS execution

https://www.toplista.it/: 150ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-H69T...: 96ms CPU time

Unattributable: 63ms CPU time

https://www.googletagmanager.com/gtm.js?id=GTM-M7T...: 50ms CPU time

Third-party scripts: 296ms (83% of total)

Main Thread Breakdown

Script Evaluation 39% Style & Layout 24% Other 21% Script Parsing & Compilation 8% Parse HTML & CSS 4% Rendering 4%

Script	Total	Scripting	Parse/Compile	Party
https://www.toplista.it/	150ms	4ms	1ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-H69TWWZGRW&cx=c&gtm=4e6b41h1	96ms	86ms	10ms	3rd
Unattributable	63ms	2ms	0ms	1st
https://www.googletagmanager.com/gtm.js?id=GTM-M7T7XF9	50ms	34ms	14ms	3rd

A+

Font Loading

1 fonts (38 KB)

PASS

1 fonts (38 KB)

1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

38 KB total

Render-blocking

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

qFdH35WCmI96Ajtm81GlU9v... woff2 swap

Size 38 KB

Load time 46 ms

Start 380 ms

Risk FOUT — 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

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

No optimization needed

PASS

No optimization needed

No resource hint issues

A+

Asset Compression

All 1 asset host use brotli

PASS

All 1 asset host use brotli

www.toplista.it serves assets with brotli (assets: 98)

Got: www.toplista.it (text/css)

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

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

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.

Network Waterfall

71 requests over 1831ms

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-party 296ms · 379KB · €3/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
www.toplista.it www.toplista.it	Other	150ms	36 KB	—	€2/mo	Optional
Google Tag Manager www.googletagmanager.com	Tag Manager	96ms	187 KB	36%	€1/mo	Optional
Google Tag Manager www.googletagmanager.com	Tag Manager	50ms	156 KB	58%	€1/mo	Optional

www.toplista.it

Other

Optional

Execution 150ms

Transfer 36 KB

Monthly Cost €2/mo

Google Tag Manager

Tag Manager

Optional

Execution 96ms

Transfer 187 KB

Unused 36%

Monthly Cost €1/mo

Google Tag Manager

Tag Manager

Optional

Execution 50ms

Transfer 156 KB

Unused 58%

Monthly Cost €1/mo

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

58% 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.

Source: web.dev

How third-party costs are calculated

Image Optimization

32 images, 1071 KB total, 79 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

1071 KB

Oversized

Wasted

79 KB

2 missing dimensions 13 missing lazy loading

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