Webperf result blog.ynzen.com
4.27
Results from https://blog.ynzen.com/
Lighthouse Performance
4.70
Results collected at 2025-04-09
- The website is fast.
Performance section:
- Total Blocking Time 5.00
- Largest Contentful Paint: 3.1 s 3.75
- Cumulative Layout Shift 5.00
- Speed Index: 2.4 s 4.90
- First Contentful Paint 5.00
- Largest Contentful Paint element 1.00
- Reduce unused CSS 1.00
- Reduce unused JavaScript 1.00
- Time to Interactive: 7.8 s 2.20
- Avoid enormous network payloads: Total size was 3,264 KiB 2.50
- Serve images in next-gen formats: Potential savings of 2,141 KiB 2.50
- Properly size images: Potential savings of 1,085 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
- Max Potential First Input Delay: 140 ms 4.30
- 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
- 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
- Defer offscreen images 5.00
- Eliminate render-blocking resources 5.00
- Minify CSS 5.00
- Minify JavaScript 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
Performance section:
- Total Blocking Time 5.00
- Largest Contentful Paint: 3.1 s 3.75
- Cumulative Layout Shift 5.00
- Speed Index: 2.4 s 4.90
- First Contentful Paint 5.00
- Largest Contentful Paint element 1.00
- Reduce unused CSS 1.00
- Reduce unused JavaScript 1.00
- Time to Interactive: 7.8 s 2.20
- Avoid enormous network payloads: Total size was 3,264 KiB 2.50
- Serve images in next-gen formats: Potential savings of 2,141 KiB 2.50
- Properly size images: Potential savings of 1,085 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
- Max Potential First Input Delay: 140 ms 4.30
- 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
- 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
- Defer offscreen images 5.00
- Eliminate render-blocking resources 5.00
- Minify CSS 5.00
- Minify JavaScript 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
Lighthouse SEO
5.00
Results collected at 2025-04-09
- 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
- 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
Lighthouse Best Practices
5.00
Results collected at 2025-04-09
- 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
- 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
Standard Files
4.38
Results collected at 2025-04-09
- 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
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
Lighthouse A11y
4.80
Results collected at 2025-04-09
- 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
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
Sitespeed.io
4.89
Results collected at 2025-04-09
Performance section:
- [desktop] TTFB (Time to First Byte): 107.00ms, ±2.00ms 5.00
- [desktop] DOMContentLoaded: 264.67ms, ±2.33ms 5.00
- [desktop] LCP (Largest Contentful Paint): 400.00ms, ±28.00ms 5.00
- [desktop] Load: 1578.67ms, ±681.33ms 2.84
- [desktop] TBT (Total Blocking Time): 15.50ms, ±5.50ms 5.00
- [desktop] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [desktop] FirstVisualChange: 233.50ms, ±0.50ms 5.00
- [desktop] SpeedIndex: 259.00ms, ±4.00ms 5.00
- [desktop] VisualComplete85: 233.50ms, ±0.50ms 5.00
- [desktop] FCP (First Contentful Paint): 236.00ms, ±0.00ms 5.00
- [desktop] firstPaint: 236.00ms, ±0.00ms
- [desktop] LastVisualChange: 584.00ms, ±16.00ms
- [mobile] TTFB (Time to First Byte): 106.00ms, ±1.00ms 5.00
- [mobile] DOMContentLoaded: 427.67ms, ±135.33ms 5.00
- [mobile] LCP (Largest Contentful Paint): 320.00ms, ±0.00ms 5.00
- [mobile] Load: 1419.00ms, ±451.00ms 5.00
- [mobile] FirstVisualChange: 217.50ms, ±16.50ms 5.00
- [mobile] SpeedIndex: 250.50ms, ±15.50ms 5.00
- [mobile] VisualComplete85: 217.50ms, ±16.50ms 5.00
- [mobile] TBT (Total Blocking Time): 3.75ms, ±1.25ms 5.00
- [mobile] FCP (First Contentful Paint): 208.00ms, ±0.00ms 5.00
- [mobile] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [mobile] firstPaint: 208.00ms, ±12.00ms
- [mobile] LastVisualChange: 651.00ms, ±17.00ms
- [desktop] TTFB (Time to First Byte): 107.00ms, ±2.00ms 5.00
- [desktop] DOMContentLoaded: 264.67ms, ±2.33ms 5.00
- [desktop] LCP (Largest Contentful Paint): 400.00ms, ±28.00ms 5.00
- [desktop] Load: 1578.67ms, ±681.33ms 2.84
- [desktop] TBT (Total Blocking Time): 15.50ms, ±5.50ms 5.00
- [desktop] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [desktop] FirstVisualChange: 233.50ms, ±0.50ms 5.00
- [desktop] SpeedIndex: 259.00ms, ±4.00ms 5.00
- [desktop] VisualComplete85: 233.50ms, ±0.50ms 5.00
- [desktop] FCP (First Contentful Paint): 236.00ms, ±0.00ms 5.00
- [desktop] firstPaint: 236.00ms, ±0.00ms
- [desktop] LastVisualChange: 584.00ms, ±16.00ms
- [mobile] TTFB (Time to First Byte): 106.00ms, ±1.00ms 5.00
- [mobile] DOMContentLoaded: 427.67ms, ±135.33ms 5.00
- [mobile] LCP (Largest Contentful Paint): 320.00ms, ±0.00ms 5.00
- [mobile] Load: 1419.00ms, ±451.00ms 5.00
- [mobile] FirstVisualChange: 217.50ms, ±16.50ms 5.00
- [mobile] SpeedIndex: 250.50ms, ±15.50ms 5.00
- [mobile] VisualComplete85: 217.50ms, ±16.50ms 5.00
- [mobile] TBT (Total Blocking Time): 3.75ms, ±1.25ms 5.00
- [mobile] FCP (First Contentful Paint): 208.00ms, ±0.00ms 5.00
- [mobile] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [mobile] firstPaint: 208.00ms, ±12.00ms
- [mobile] LastVisualChange: 651.00ms, ±17.00ms
Yellow Lab Tools
3.30
Results collected at 2025-04-09
- The website is neither good nor bad. 3.30
- Network 4.15
- Images 1.00
- DOM complexity 4.90
- JS complexity 5.00
- Bad JS 5.00
- jQuery 5.00
- CSS complexity 4.85
- Bad CSS 4.85
- Web fonts 2.00
- Server config 5.00
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 2.90
- Gzip/Brotli compression 4.40
- File minification 2.80
- 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 5.00
- Caching disabled 5.00
- Caching not specified 5.00
- Caching too short 5.00
- Network 4.15
- Images 1.00
- DOM complexity 4.90
- JS complexity 5.00
- Bad JS 5.00
- jQuery 5.00
- CSS complexity 4.85
- Bad CSS 4.85
- Web fonts 2.00
- Server config 5.00
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 2.90
- Gzip/Brotli compression 4.40
- File minification 2.80
- 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 5.00
- Caching disabled 5.00
- Caching not specified 5.00
- Caching too short 5.00
Pa11y
4.35
Results collected at 2025-04-09
- The website can be more accessible, but is rather good!
Accessibility section:
- Number of types of issues: 4 4.20
- Number of issues: 5 4.50
##### 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.
- Iframe element requires a non-empty title attribute that identifies the frame.
Accessibility section:
- Number of types of issues: 4 4.20
- Number of issues: 5 4.50
##### 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.
- Iframe element requires a non-empty title attribute that identifies the frame.
Integrity & Security
3.09
Results collected at 2025-04-09
- 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
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
Energy Efficiency
5.00
Results collected at 2025-04-09
- 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
- 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
Stylelint CSS
5.00
Results collected at 2025-04-09
- 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
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
HTML-validate
1.00
Results collected at 2025-04-09
- The HTML is very bad.
ESLint JS
5.00
Results collected at 2025-04-09
- The JS is very good.
Security section:
- `<script>`, number of grouped error type: 0 5.00
- `<script>`, number of errors: 0 5.00
- `<script src="...">`, number of grouped error type: 0 5.00
- `<script src="...">`, number of errors: 0 5.00
- `content-type=".*javascript.*"`, number of grouped error type: 0 5.00
- `content-type=".*javascript.*"`, number of errors: 0 5.00
Standards section:
- `<script>`, number of grouped error type: 0 5.00
- `<script>`, number of errors: 0 5.00
- `<script src="...">`, number of grouped error type: 0 5.00
- `<script src="...">`, number of errors: 0 5.00
- `content-type=".*javascript.*"`, number of grouped error type: 0 5.00
- `content-type=".*javascript.*"`, number of errors: 0 5.00
Security section:
- `<script>`, number of grouped error type: 0 5.00
- `<script>`, number of errors: 0 5.00
- `<script src="...">`, number of grouped error type: 0 5.00
- `<script src="...">`, number of errors: 0 5.00
- `content-type=".*javascript.*"`, number of grouped error type: 0 5.00
- `content-type=".*javascript.*"`, number of errors: 0 5.00
Standards section:
- `<script>`, number of grouped error type: 0 5.00
- `<script>`, number of errors: 0 5.00
- `<script src="...">`, number of grouped error type: 0 5.00
- `<script src="...">`, number of errors: 0 5.00
- `content-type=".*javascript.*"`, number of grouped error type: 0 5.00
- `content-type=".*javascript.*"`, number of errors: 0 5.00