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Performance

· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
3
REVIEW
8
PASS
12
INFO
5

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

Mobile Desktop
51
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
69
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
67
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
82
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.

1.63 s

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

13.57 s

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

159 ms

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

0.346

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

5.64 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.

13.57 s

Page Load Progression

491 ms
981 ms
1.5 s
2.0 s
2.5 s
2.9 s
3.4 s
3.9 s
Checks
28
12 PASS 8 REVIEW 3 FIX
F
Page Weight Budget
Action
10.2 MB transferred, 63 requests
FIX
10.2 MB transferred, 63 requests
Critical::
Page weighs 10.6 MB (10.2 MB transferred)
Warning::
Images are 10.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 10.1 MB
Info::
63 HTTP requests
Info::
Estimated 2.1 g CO2 per page load
10.2 MB / 2.4 MB budget
10.2 MB transferred
63 requests
2.1 g CO2 per page load
Images 10.1 MiB 98%
JavaScript 158.9 KiB 2%
HTML 31.6 KiB 0%
Other 547 B 0%
Other 492 B 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

D
JS Execution Cost
Action
2179ms total JS execution
FIX
2179ms total JS execution
Warning::
Unattributable: 1114ms CPU time
Warning::
http://wonk.sytes.net/76s/pratka/index.html: 790ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-GSWF...: 275ms CPU time
Info::
Third-party scripts: 275ms (13% of total)

Main Thread Breakdown

Other 59% Rendering 14% Style & Layout 12% Script Evaluation 12%
ScriptTotalScriptingParse/CompileParty
Unattributable1114ms9ms0ms1st
http://wonk.sytes.net/76s/pratka/index.html790ms18ms3ms1st
https://www.googletagmanager.com/gtag/js?id=G-GSWFZK5K4X275ms228ms43ms3rd
D
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.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
57 images, 0 KB saveable
REVIEW
57 images, 0 KB saveable
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140206_1129... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/p8270220.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130829_2015... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130901_1147... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20131125_2058... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140209_1339... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140209_1521... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150419_1601... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140206_1831... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140611_1841... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150418_1210... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150702_2108... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140206_1832... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130901_1231... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20131203_1815... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20131218_1105... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140209_1131... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140902_1905... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130829_1811... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/SNAK0033.JPG is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140209_1326... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130905_1812... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20131203_1634... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140206_1832... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140206_1814... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150423_1817... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130829_1845... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140903_2036... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150418_1143... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130828_1634... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/SNAK0029.JPG is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20131127_1859... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140611_1921... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150425_1954... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130901_1147... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150422_2226... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150703_1256... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130828_1719... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130828_1633... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150419_1525... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150422_2221... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150702_1857... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20131220_1845... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130901_1156... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/SNAK0032.JPG is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150422_2147... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150422_2147... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130905_2110... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140907_0911... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20150703_1730... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140903_2136... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140906_1804... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130828_1633... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20130901_1150... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140206_1831... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140206_1815... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
http://wonk.sytes.net/76s/pratka/gfx/20140209_1531... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
57 images 10.1 MB
0 oversized -0 KB
57 legacy format
57 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

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

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

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

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

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

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

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

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Bundles
1 scripts, 70 KB unused
REVIEW
1 scripts, 70 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-GSWF...: 70 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 70 KB
70 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-GSWFZK5K4X159 KB70 KB (44%)✓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

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.
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
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.
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
Page Weight Inventory
Action
63 resources · 10.2 MB · 70 KB savings available
REVIEW
63 resources · 10.2 MB · 70 KB savings available
Warning::
Page weight 10.2 MB exceeds 1 MB target by 9.2 MB
Got: 10.2 MB Expected: ≤ 1 MB
Info::
~70 KB of savings available
Info::
2 third-party resources (2% of weight)
Info::
23 resources over 200KB
63 resources · 10.2 MiB · 2 third-party 9.2 MiB over 1MB target
Image 98% · 10.1 MiB
JavaScript 2% · 158.9 KiB
Document 0% · 32.1 KiB
Other 0% · 547 B

~69.8 KiB of savings available

Remove unused JavaScript: 69.8 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
2% third-party, 0 ms blocking
PASS
2% third-party, 0 ms blocking
Info::
Third-party code accounts for 2% of page weight (159.4 KiB of 10.2 MiB)
Info::
Third-party blocking time is low (0 ms)
98%
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+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
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
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
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
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::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
63 requests over 6124ms
INFO
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h2https://region1.google-analytics.com/g/collect?v=2&tid=G-GSWFZK5K4X&gtm=45je6a21h1v9130883679za200zd9130883679xf1&_p=1791286815560&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&cid=1487237033.1791286816&frm=0&ngs=1&pscdl=noapi&rcb=3&sr=412x823&ul=en-us&_s=1&tag_exp=115616985~115938465~115938468~118897920~118897930~120213116~120385423~120469145~120469153~121046263~121046271~121280970&sid=1791286815&sct=1&seg=0&dl=http%3A%2F%2Fwonk.sytes.net%2F76s%2Fpratka%2Findex.html&dt=Pr%C3%A4tk%C3%A4&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=3452region1.google-analytics.com/g/coll... 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http/1.1http://wonk.sytes.net/76s/pratka/gfx/20131127_185916.jpg/76s/pratka/gfx/20131127_185916.jpg http://wonk.sytes.net/76s/pratka/gfx/20131127_185916.jpg — 200 — 216.8 KiB — 264 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20131203_163431.jpg/76s/pratka/gfx/20131203_163431.jpg http://wonk.sytes.net/76s/pratka/gfx/20131203_163431.jpg — 200 — 193.9 KiB — 130 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20131203_181545.jpg/76s/pratka/gfx/20131203_181545.jpg http://wonk.sytes.net/76s/pratka/gfx/20131203_181545.jpg — 200 — 183.7 KiB — 363 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20131218_110546.jpg/76s/pratka/gfx/20131218_110546.jpg http://wonk.sytes.net/76s/pratka/gfx/20131218_110546.jpg — 200 — 166.4 KiB — 113 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20131220_184543.jpg/76s/pratka/gfx/20131220_184543.jpg http://wonk.sytes.net/76s/pratka/gfx/20131220_184543.jpg — 200 — 83.6 KiB — 116 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20140206_112901.jpg/76s/pratka/gfx/20140206_112901.jpg http://wonk.sytes.net/76s/pratka/gfx/20140206_112901.jpg — 200 — 295.7 KiB — 422 ms — http/1.1
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 1.6 s LCP 13.6 shttp://wonk.sytes.net/76s/pratka/index.html/76s/pratka/index.html http://wonk.sytes.net/76s/pratka/index.html — 307 — 0 B — 3 ms — http/1.1https://wonk.sytes.net/76s/pratka/index.html/76s/pratka/index.html https://wonk.sytes.net/76s/pratka/index.html — 307 — 0 B — 3.0 s — http/1.1http://wonk.sytes.net/76s/pratka/index.html/76s/pratka/index.html http://wonk.sytes.net/76s/pratka/index.html — 200 — 31.6 KiB — 183 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/p8270220.jpg/76s/pratka/gfx/p8270220.jpg http://wonk.sytes.net/76s/pratka/gfx/p8270220.jpg — 200 — 70.7 KiB — 306 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20130828_163330.jpg/76s/pratka/gfx/20130828_163330.jpg http://wonk.sytes.net/76s/pratka/gfx/20130828_163330.jpg — 200 — 136.6 KiB — 786 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20130828_163406.jpg/76s/pratka/gfx/20130828_163406.jpg http://wonk.sytes.net/76s/pratka/gfx/20130828_163406.jpg — 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http/1.1http://wonk.sytes.net/76s/pratka/gfx/20130829_184510.jpg/76s/pratka/gfx/20130829_184510.jpg http://wonk.sytes.net/76s/pratka/gfx/20130829_184510.jpg — 200 — 113.9 KiB — 449 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20130829_201544.jpg/76s/pratka/gfx/20130829_201544.jpg http://wonk.sytes.net/76s/pratka/gfx/20130829_201544.jpg — 200 — 177.5 KiB — 499 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20130905_181252.jpg/76s/pratka/gfx/20130905_181252.jpg http://wonk.sytes.net/76s/pratka/gfx/20130905_181252.jpg — 200 — 215.7 KiB — 514 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20130901_115616.jpg/76s/pratka/gfx/20130901_115616.jpg http://wonk.sytes.net/76s/pratka/gfx/20130901_115616.jpg — 200 — 194.6 KiB — 536 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/SNAK0029.JPG/76s/pratka/gfx/SNAK0029.JPG http://wonk.sytes.net/76s/pratka/gfx/SNAK0029.JPG — 200 — 62.3 KiB — 555 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20130901_123110.jpg/76s/pratka/gfx/20130901_123110.jpg http://wonk.sytes.net/76s/pratka/gfx/20130901_123110.jpg — 200 — 241.9 KiB — 696 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/SNAK0032.JPG/76s/pratka/gfx/SNAK0032.JPG http://wonk.sytes.net/76s/pratka/gfx/SNAK0032.JPG — 200 — 53.8 KiB — 614 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/SNAK0033.JPG/76s/pratka/gfx/SNAK0033.JPG http://wonk.sytes.net/76s/pratka/gfx/SNAK0033.JPG — 200 — 59.0 KiB — 637 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20130901_114720.jpg/76s/pratka/gfx/20130901_114720.jpg http://wonk.sytes.net/76s/pratka/gfx/20130901_114720.jpg — 200 — 233.6 KiB — 875 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=G-GSWFZK5K4Xwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-GSWFZK5K4X — 200 — 158.9 KiB — 168 ms — 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https://region1.google-analytics.com/g/collect?v=2&tid=G-GSWFZK5K4X&gtm=45je6a21h1v9130883679za200zd9130883679xf1&_p=1791286815560&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&cid=1487237033.1791286816&frm=0&ngs=1&pscdl=noapi&rcb=3&sr=412x823&ul=en-us&_s=1&tag_exp=115616985~115938465~115938468~118897920~118897930~120213116~120385423~120469145~120469153~121046263~121046271~121280970&sid=1791286815&sct=1&seg=0&dl=http%3A%2F%2Fwonk.sytes.net%2F76s%2Fpratka%2Findex.html&dt=Pr%C3%A4tk%C3%A4&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=3452 — 204 — 547 B — 100 ms — h2http://wonk.sytes.net/76s/pratka/gfx/20130905_211004.jpg/76s/pratka/gfx/20130905_211004.jpg http://wonk.sytes.net/76s/pratka/gfx/20130905_211004.jpg — 200 — 222.6 KiB — 163 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20131125_205830.jpg/76s/pratka/gfx/20131125_205830.jpg http://wonk.sytes.net/76s/pratka/gfx/20131125_205830.jpg — 200 — 132.3 KiB — 119 ms — 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http/1.1http://wonk.sytes.net/76s/pratka/gfx/20150702_185738_resize.jpg/76s/pratka/gfx/20150702_185738_res... http://wonk.sytes.net/76s/pratka/gfx/20150702_185738_resize.jpg — 200 — 257.6 KiB — 374 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20150703_173042_resize.jpg/76s/pratka/gfx/20150703_173042_res... http://wonk.sytes.net/76s/pratka/gfx/20150703_173042_resize.jpg — 200 — 248.3 KiB — 141 ms — http/1.1http://wonk.sytes.net/76s/pratka/gfx/20150703_125633_resize.jpg/76s/pratka/gfx/20150703_125633_res... http://wonk.sytes.net/76s/pratka/gfx/20150703_125633_resize.jpg — 200 — 147.1 KiB — 113 ms — http/1.1http://wonk.sytes.net/favicon.ico/favicon.ico http://wonk.sytes.net/favicon.ico — 404 — 492 B — 100 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
13% of JavaScript execution is third-party
First-party Third-party 275ms · 159KB · €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 275ms
Transfer 159 KB
Unused 44%
Monthly Cost €3/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 275ms and costs ~€3/month

Google Tag Manager takes 275ms 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

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 (2026-09-07 — 2026-10-04)

LCP (p75)

3698 ms

46% good

INP (p75)

0 ms

0% good

CLS (p75)

0.040

80% good

FCP (p75)

3439 ms

TTFB (p75)

3253 ms

Image Optimization
57 images, 10282 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

57

Total Size

10282 KB

56 missing alt text 57 missing dimensions 56 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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