Webperf result blog.ynzen.com

- The website is fast.

Performance section:
- Total Blocking Time: 200 ms 4.50
- Largest Contentful Paint: 2.1 s 4.75
- Cumulative Layout Shift 5.00
- First Contentful Paint 5.00
- Speed Index 5.00
- Reduce unused JavaScript 1.00
- Reduce unused CSS: Potential savings of 15 KiB 2.50
- Properly size images: Potential savings of 14 KiB 2.50
- Avoid serving legacy JavaScript to modern browsers: Potential savings of 0 KiB 2.50
- Does not use passive listeners to improve scrolling performance: 2.50
- Time to Interactive: 6.9 s 2.70
- Max Potential First Input Delay: 170 ms 3.90
- Has a `<meta name="viewport">` tag with `width` or `initial-scale` 5.00
- Screenshot Thumbnails 5.00
- Final Screenshot 5.00
- Initial server response time was short 5.00
- User Timing marks and measures 5.00
- Avoid chaining critical requests 5.00
- Avoid multiple page redirects 5.00
- Minimizes main-thread work 5.00
- JavaScript execution time 5.00
- Preconnect to required origins 5.00
- All text remains visible during webfont loads 5.00
- Diagnostics 5.00
- Network Requests 5.00
- Network Round Trip Times 5.00
- Server Backend Latencies 5.00
- Tasks 5.00
- Metrics 5.00
- Resources Summary 5.00
- Minimize third-party usage 5.00
- Largest Contentful Paint element 5.00
- Avoid large layout shifts 5.00
- Avoid long main-thread tasks 5.00
- Image elements have explicit `width` and `height` 5.00
- Script Treemap Data 5.00
- Uses efficient cache policy on static assets 5.00
- Avoids enormous network payloads 5.00
- Defer offscreen images 5.00
- Eliminate render-blocking resources 5.00
- Minify CSS 5.00
- Minify JavaScript 5.00
- Serve images in next-gen formats 5.00
- Efficiently encode images 5.00
- Enable text compression 5.00
- Use video formats for animated content 5.00
- Remove duplicate modules in JavaScript bundles 5.00
- Avoids an excessive DOM size 5.00
- Avoids `document.write()` 5.00
- Use HTTP/2 5.00
- Page didn't prevent back/forward cache restoration 5.00

- The webpage is really optimised for SEO!
- Page isn’t blocked from indexing 5.00
- Document has a `<title>` element 5.00
- Image elements have `[alt]` attributes 5.00
- Document has a meta description 5.00
- Page has successful HTTP status code 5.00
- Links have descriptive text 5.00
- Links are crawlable 5.00
- robots.txt is valid 5.00
- Document has a valid `hreflang` 5.00
- Document has a valid `rel=canonical` 5.00

- The website is adhering to best practice according to Google Lighthouse!
- Uses HTTPS 5.00
- Avoids deprecated APIs 5.00
- Avoids third-party cookies 5.00
- Allows users to paste into input fields 5.00
- Has a `<meta name="viewport">` tag with `width` or `initial-scale` 5.00
- No browser errors logged to the console 5.00
- Displays images with correct aspect ratio 5.00
- Serves images with appropriate resolution 5.00
- Page has the HTML doctype 5.00
- Properly defines charset 5.00
- Avoids requesting the geolocation permission on page load 5.00
- No issues in the `Issues` panel in Chrome Devtools 5.00
- Avoids requesting the notification permission on page load 5.00
- Document uses legible font sizes 5.00
- Page has valid source maps 5.00
- Ensure CSP is effective against XSS attacks 5.00
- Use a strong HSTS policy 5.00
- Ensure proper origin isolation with COOP 5.00
- Detected JavaScript libraries 5.00

- The tested page has a lot of errors in its HTML code. A total of 0.

- RSS subscription found in webpage metadata. 5.00

Standards section:
- robots.txt seems ok. 5.00
- Sitemap, Url in <loc> is starting with https:// 5.00
- Sitemap, Url in <loc> is using same domain as robots.txt 5.00
- Sitemap, No duplicate Urls in <loc> 5.00
- Sitemap, is only listing webpages 5.00
- Sitemap(s) are only specified once 5.00
- Sitemap, is under 50 000 items 5.00
- The Sitemap is neither good or bad. 5.00
- security.txt is missing the required contact info. 2.50

- The website can be more accessible, but is rather good!

Accessibility section:
- Links do not have a discernible name 1.00
- `[aria-*]` attributes match their roles 5.00
- `[aria-hidden="true"]` is not present on the document `<body>` 5.00
- `[role]`s have all required `[aria-*]` attributes 5.00
- `[aria-*]` attributes have valid values 5.00
- `[aria-*]` attributes are valid and not misspelled 5.00
- Buttons have an accessible name 5.00
- Image elements have `[alt]` attributes 5.00
- `[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5. 5.00
- ARIA attributes are used as specified for the element's role 5.00
- `[aria-hidden="true"]` elements do not contain focusable descendents 5.00
- Elements use only permitted ARIA attributes 5.00
- `[role]` values are valid 5.00
- Background and foreground colors have a sufficient contrast ratio 5.00
- Document has a `<title>` element 5.00
- `<html>` element has a `[lang]` attribute 5.00
- `<html>` element has a valid value for its `[lang]` attribute 5.00
- Touch targets have sufficient size and spacing. 5.00
- Elements with visible text labels do not have matching accessible names. 1.00
- Heading elements appear in a sequentially-descending order 5.00
- Uses ARIA roles only on compatible elements 5.00
- Deprecated ARIA roles were not used 5.00
- Image elements do not have `[alt]` attributes that are redundant text. 5.00
- Document has a main landmark. 5.00

Performance section:
- [desktop] TTFB (Time to First Byte): 99.50ms, ±3.50ms 5.00
- [desktop] DOMContentLoaded: 238.00ms, ±2.00ms 5.00
- [desktop] FCP (First Contentful Paint): 207.00ms, ±0.00ms 5.00
- [desktop] LCP (Largest Contentful Paint): 336.00ms, ±0.00ms 5.00
- [desktop] Load: 1120.00ms, ±200.00ms 3.76
- [desktop] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [desktop] FirstVisualChange: 216.50ms, ±16.50ms 5.00
- [desktop] SpeedIndex: 234.00ms, ±14.00ms 5.00
- [desktop] VisualComplete85: 216.50ms, ±16.50ms 5.00
- [desktop] TBT (Total Blocking Time): 0.00ms, ±0.00ms 5.00
- [desktop] firstPaint: 207.00ms, ±0.00ms
- [desktop] LastVisualChange: 516.50ms, ±16.50ms
- [mobile] TTFB (Time to First Byte): 103.67ms, ±4.33ms 5.00
- [mobile] DOMContentLoaded: 233.67ms, ±18.33ms 5.00
- [mobile] FCP (First Contentful Paint): 228.67ms, ±11.33ms 5.00
- [mobile] LCP (Largest Contentful Paint): 308.67ms, ±7.33ms 5.00
- [mobile] Load: 1266.67ms, ±83.33ms 5.00
- [mobile] FirstVisualChange: 217.00ms, ±17.00ms 5.00
- [mobile] SpeedIndex: 241.50ms, ±16.50ms 5.00
- [mobile] VisualComplete85: 217.00ms, ±17.00ms 5.00
- [mobile] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [mobile] TBT (Total Blocking Time): 0.00ms, ±0.00ms 5.00
- [mobile] firstPaint: 228.67ms, ±11.33ms
- [mobile] LastVisualChange: 650.50ms, ±16.50ms

- The website has rather good frontend code. 4.60
- Network 4.65
- Images 4.90
- DOM complexity 4.90
- JS complexity 5.00
- Bad JS 5.00
- jQuery 5.00
- CSS complexity 4.40
- Bad CSS 4.85
- Web fonts 2.00
- Server config 4.55

Performance section:
- Number of iframes 5.00
- Total JS execution time 5.00
- DOM access 5.00
- Scroll events bound 5.00
- document.write calls 5.00
- Synchronous Ajax requests 5.00
- Rules count 5.00
- Total weight 5.00
- Gzip/Brotli compression 4.50
- File minification 3.00
- Requests number 5.00
- Different domains 5.00
- 404 not found 5.00
- Connections closed 5.00
- Identical content 4.00
- Below the fold images 5.00
- Webfonts number 1.25
- Overweighted webfonts 1.00
- WOFF 2 5.00
- HTTP protocols 5.00
- TLS protocols 3.00
- Caching disabled 5.00
- Caching not specified 5.00
- Caching too short 5.00

- The website can be more accessible, but is rather good!

Accessibility section:
- Number of types of issues: 3 4.40
- Number of issues: 4 4.60

##### Problems:
- A element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 4.5:1, but text in this element has a contrast ratio of 4.4:1. Recommendation: change background to #f7f7f8.
- Duplicate id attribute value "__jsx-668768712" found on the web page.
- Anchor element found with a valid href attribute, but no link content has been supplied.

- About average privacy settings, but should get better.

Security section:
- HTTPS by default is good! 5.00
- HTTP Strict Transport Security HSTS is ok, with 1 error(s) and 1 warning(s). 4.25
- Content Security Policy is pretty bad. 1.00
- Reporting CSP Certificate Transparency Network Error Logging is good! 5.00
- Referrer Policy is not that good. 2.50
- Subresource Integrity SRI is pretty bad. 1.00
- HTTP headers is good! 5.00
- Cookies is ok, with 15 error(s) and 0 warning(s). 1.00

- Webpage generates very little carbon dioxide!
- Carbon dioxide per pageview: 0.0 gram(s)
- More green than 99 % of the websites tested by webperf.se (Reference updated: 2025-01-09).
- Network transfer size: 0.00 KB 5.00

- The CSS is very good.

Standards section:
- `<style>`, number of grouped error type: 0 5.00
- `<style>`, number of errors: 0 5.00
- `style=""`, number of grouped error type: 0 5.00
- `style=""`, number of errors: 0 5.00
- `<link rel="stylesheet">`, number of grouped error type: 0 5.00
- `<link rel="stylesheet">`, number of errors: 0 5.00
- `content-type=".*css.*"`, number of grouped error type: 0 5.00
- `content-type=".*css.*"`, number of errors: 0 5.00