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

100

Best Practices

SEO

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

1.71 s

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

8.21 s

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

0 ms

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

0.002

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

5.66 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.

8.23 s

Page Load Progression

815 ms

1.6 s

2.4 s

3.3 s

4.1 s

4.9 s

5.7 s

6.5 s

Checks

10 PASS 8 REVIEW 2 FIX

Page Weight Budget

Action

11.9 MB transferred, 103 requests

FIX

11.9 MB transferred, 103 requests

Page weighs 14.8 MB (11.9 MB transferred)

Images are 6.4 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 6.4 MB

CSS is 465 KB — consider purging unused styles

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Got: 465 KB

103 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 2.5 g CO2 per page load

11.9 MB transferred

103 requests

2.5 g CO2 per page load

Images 6.4 MiB 54%

Other 4.4 MiB 37%

CSS 465.1 KiB 4%

JavaScript 438.4 KiB 4%

HTML 129.2 KiB 1%

Fonts 42.9 KiB 0%

Other 1.6 KiB 0%

0 2.4 MB 4.9 MB

Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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.

Image Optimization

39 images, 0 KB saveable

REVIEW

39 images, 0 KB saveable

All images are well-optimized

39 images 6.4 MB

0 oversized -0 KB

39 legacy format

0 missing dimensions CLS risk

JS Bundles

28 scripts, 132 KB unused

REVIEW

28 scripts, 132 KB unused

https://tambosi-odeonsplatz.de/wp-includes/js/medi...: 97 KB unused (63%)

Consider code splitting or tree shaking to reduce unused code.

https://tambosi-odeonsplatz.de/wp-includes/js/jque...: 36 KB unused (42%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 132 KB

132 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://tambosi-odeonsplatz.de/wp-includes/js/mediaelement/mediaelement-and-player.min.js?ver=4.2.17	155 KB	97 KB (63%)	✓	1st
https://tambosi-odeonsplatz.de/wp-includes/js/jquery/jquery.min.js?ver=3.7.1	86 KB	36 KB (42%)	✓	1st
https://tambosi-odeonsplatz.de/wp-content/themes/enfold/js/shortcodes.min.js?ver=7.1	23 KB	—	✓	1st
https://tambosi-odeonsplatz.de/wp-content/themes/enfold/config-gutenberg/js/avia_blocks_front.min.js?ver=7.1	2 KB	—	✓	1st
https://d18wbssj9sd0zj.cloudfront.net/reservations/v2.0/reservations.js?_g_app_v_=16156d452770b601f01265ca362e79db9fe932dd	2 KB	—	✓	3rd
https://tambosi-odeonsplatz.de/wp-content/themes/enfold/js/waypoints/waypoints.min.js?ver=7.1	9 KB	—	✓	1st
https://tambosi-odeonsplatz.de/wp-content/themes/enfold/js/avia.min.js?ver=7.1	26 KB	—	✓	1st
https://tambosi-odeonsplatz.de/wp-content/themes/enfold/js/avia-js.min.js?ver=7.1	2 KB	—	✓	1st
https://tambosi-odeonsplatz.de/wp-content/themes/enfold/config-templatebuilder/avia-shortcodes/gallery/gallery.min.js?ver=7.1	3 KB	—	✓	1st
https://tambosi-odeonsplatz.de/wp-content/themes/enfold/config-templatebuilder/avia-shortcodes/slideshow/slideshow.min.js?ver=7.1	17 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

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

103 resources · 11.9 MB · 132 KB savings available

REVIEW

103 resources · 11.9 MB · 132 KB savings available

Page weight 11.9 MB exceeds 1 MB target by 10.9 MB

Got: 11.9 MB Expected: ≤ 1 MB

~132 KB of savings available

11 third-party resources (1% of weight)

22 resources over 200KB

103 resources · 11.9 MiB · 11 third-party 10.9 MiB over 1MB target

Image 54% · 6.4 MiB

Media 37% · 4.4 MiB

CSS 4% · 465.1 KiB

JavaScript 4% · 438.4 KiB

Document 1% · 129.2 KiB

Font 0% · 42.9 KiB

Other 0% · 521 B

~132.4 KiB of savings available

Remove unused JavaScript: 132.4 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

103 resources			11.9 MiB

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Third-Party Impact

1% third-party, 0 ms blocking

PASS

1% third-party, 0 ms blocking

Third-party code accounts for 1% of page weight (114.3 KiB of 11.9 MiB)

Third-party blocking time is low (0 ms)

99%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

JS Execution Cost

458ms total JS execution

PASS

458ms total JS execution

https://tambosi-odeonsplatz.de/: 197ms CPU time

Unattributable: 147ms CPU time

https://tambosi-odeonsplatz.de/wp-includes/js/jque...: 114ms CPU time

Main Thread Breakdown

Other 50% Script Evaluation 22% Style & Layout 16% Rendering 5% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://tambosi-odeonsplatz.de/	197ms	8ms	2ms	1st
Unattributable	147ms	1ms	0ms	1st
https://tambosi-odeonsplatz.de/wp-includes/js/jquery/jquery.min.js?ver=3.7.1	114ms	82ms	2ms	1st

A+

Font Loading

2 fonts (43 KB)

PASS

2 fonts (43 KB)

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

Web fonts

43 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

entypo-fontello.woff2 woff2 swap

Size 39 KB

Load time 63 ms

Start 3.5 s

Risk FOUT — text flashes from fallback to web font

entypo-fontello-enfold.... woff2 swap

Size 4 KB

Load time 34 ms

Start 4.0 s

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

Asset Compression

1 of 1 asset host still on gzip

PASS

1 of 1 asset host still on gzip

mytools.aleno.me 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.

Got: mytools.aleno.me (application/javascript)

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

103 requests over 4209ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Real-User Performance (CrUX)

Field metrics from the Chrome User Experience Report

INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-08-11 — 2026-09-07)

LCP (p75)

6036 ms

29% good

INP (p75)

103 ms

97% good

CLS (p75)

0.010

100% good

FCP (p75)

4161 ms

TTFB (p75)

3375 ms

Image Optimization

62 images, 12105 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

12105 KB

Oversized

1 missing dimensions 29 missing lazy loading

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