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Performance

· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
1
REVIEW
6
PASS
12
INFO
2

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

623 ms

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

844 ms

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.

0.000

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

623 ms

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

844 ms

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
21
12 PASS 6 REVIEW 1 FIX
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
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.

B
Third-Party Impact
58% third-party, 0 ms blocking
REVIEW
58% third-party, 0 ms blocking
Warning::
Third-party code accounts for 58% of page weight (198.1 KiB of 344.1 KiB)
Info::
Third-party blocking time is low (0 ms)
42%
58%
First-party Third-party
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
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::
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::
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::
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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
344 KB transferred, 8 requests
PASS
344 KB transferred, 8 requests
Info::
Page weighs 764 KB (344 KB transferred)
Info::
8 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
344 KB / 2.4 MB budget
344 KB transferred
8 requests
0.07 g CO2 per page load
Fonts 127.7 KiB 37%
Images 89.5 KiB 26%
CSS 70.8 KiB 21%
HTML 32.0 KiB 9%
JavaScript 24.0 KiB 7%
Other 0 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
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Warning::
https://worklino.at/images/worklino-logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
1 images 90 KB
0 oversized -0 KB
1 legacy format
1 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

A+
JS Execution Cost
63ms total JS execution
PASS
63ms total JS execution
Info::
https://worklino.at/: 63ms CPU time

Main Thread Breakdown

Style & Layout 46% Other 33% Parse HTML & CSS 8% Script Evaluation 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://worklino.at/63ms2ms1ms1st
A+
Font Loading
1 fonts (128 KB)
PASS
1 fonts (128 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

128 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 623 ms LCP 844 mshttps://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/fonts/bootstrap-icons.woff2?dd67030699838ea613ee6dbda90effa6bootstrap-icons.woff2 https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/fonts/bootstrap-icons.woff2?dd67030699838ea613ee6dbda90effa6 — 127.7 KiB — 7 ms — font-display: swap
bootstrap-icons.woff2 woff2 swap
Size 128 KB
Load time 7 ms
Start 258 ms
Risk FOUT — 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
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 ~64 KB and ~128 ms

A+
JS Bundles
1 scripts, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js24 KB—✓3rd
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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::
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.
A
Page Weight Inventory
8 resources · 344 KB · 0 KB savings available
PASS
8 resources · 344 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 344 KB
Warning::
4 third-party resources (58% of weight)
8 resources · 344.1 KiB · 4 third-party Within 1MB page-weight target
Font 37% · 127.7 KiB
Image 26% · 89.5 KiB
CSS 21% · 70.8 KiB
Document 9% · 32.0 KiB
JavaScript 7% · 24.0 KiB
Network Waterfall
8 requests over 292ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 623 ms LCP 844 mshttps://worklino.at// https://worklino.at/ — 200 — 32.0 KiB — 142 ms — http/1.1https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.csscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css — 200 — 32.9 KiB — 13 ms — h2https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.csscdn.jsdelivr.net/npm/bootstrap-icon... https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.css — 200 — 13.4 KiB — 12 ms — h2https://worklino.at/css/worklino-web.css/css/worklino-web.css https://worklino.at/css/worklino-web.css — 200 — 24.5 KiB — 72 ms — http/1.1https://worklino.at/images/worklino-logo.png/images/worklino-logo.png https://worklino.at/images/worklino-logo.png — 200 — 89.5 KiB — 81 ms — http/1.1https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.jscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js — 200 — 24.0 KiB — 4 ms — h2https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/fonts/bootstrap-icons.woff2?dd67030699838ea613ee6dbda90effa6cdn.jsdelivr.net/npm/bootstrap-icon... https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/fonts/bootstrap-icons.woff2?dd67030699838ea613ee6dbda90effa6 — 200 — 127.7 KiB — 7 ms — h3https://worklino.at/images/worklino-logo.png/images/worklino-logo.png https://worklino.at/images/worklino-logo.png — 200 — 0 B — 3 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
2 images, 179 KB total, 88 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

179 KB

Oversized

1

Wasted

88 KB

2 missing dimensions 1 missing lazy loading
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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