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Top Technologies

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31 krnl.to Last Updated: 2 months

Success 62% of passed verification steps
Warning 23% of total warning
Errors 15% of total errors, require fast action
Share

Desktop

Mobile

Performance Desktop Score 95%
Best Practices Desktop Score 96%
SEO Desktop Score 100%
Performance Mobile Score 64%
Best Practices Mobile Score 96%
SEO Mobile Score 100%
Page Authority Authority 9%
Domain Authority Domain Authority 5%
Moz Rank 0.9/10
Bounce Rate Rate 0%
Title Tag 10 Characters
// KRNL.TO
Meta Description 167 Characters
Join us on a life-long journey into understanding the internals of systems. We will mainly be focusing around the Windows and Linux internals, but not limited to that.
Effective URL 15 Characters
https://krnl.to
Excerpt Page content
// krnl.to// krnl.to// krnl.toFollowFollowhomenewslettermembersWindows Containers Internals: IntroductionIntroducing the series and machine setupAnthony Nandaa6 min readLinux Containers Internals: runcAnthony Nandaa3 min readLinux Containers Internal...
Keywords Cloud Density
internals8 linux6 containers6 read6 anthony4 nandaa4 krnl2 kariuki2 ishuah2 windows2
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
internals 8
linux 6
containers 6
read 6
anthony 4
nandaa 4
krnl 2
kariuki 2
ishuah 2
windows 2
Google Preview Your look like this in google search result
// KRNL.TO
https://krnl.to
Join us on a life-long journey into understanding the internals of systems. We will mainly be focusing around the Windows and Linux internals, but not
Robots.txt File Detected
http://krnl.to/robots.txt
Sitemap.xml File Detected
http://krnl.to/sitemap.xml
Page Size Code & Text Ratio
Document Size: ~83.01 KB
Code Size: ~54.16 KB
Text Size: ~28.86 KB Ratio: 34.76%

Social Data

Estimation Traffic and Earnings

8
Unique Visits
Daily
14
Pages Views
Daily
$0
Income
Daily
224
Unique Visits
Monthly
399
Pages Views
Monthly
$0
Income
Monthly
2,592
Unique Visits
Yearly
4,704
Pages Views
Yearly
$0
Income
Yearly

Desktop

Desktop Screenshot
Avoid long main-thread tasks 2 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
User Timing marks and measures 8 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
JavaScript execution time 0.2 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Time to Interactive 1.5 s
Time to Interactive is the amount of time it takes for the page to become fully interactive
Font display Est savings of 60 ms
Consider setting [font-display](https://developer.chrome.com/docs/performance/insights/font-display) to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with [font metric overrides](https://developer.chrome.com/blog/font-fallbacks).
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Avoid large layout shifts 1 layout shift found
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to [windowing](https://web.dev/articles/cls#what_is_cls)
Max Potential First Input Delay 60 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
First Contentful Paint 0.3 s
First Contentful Paint marks the time at which the first text or image is painted
Total Blocking Time 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Minimizes main-thread work 0.5 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Reduce unused JavaScript Est savings of 157 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
Reduce unused CSS Est savings of 14 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity
Initial server response time was short Root document took 0 ms
Keep the server response time for the main document short because all other requests depend on it
Improve image delivery Est savings of 171 KiB
Reducing the download time of images can improve the perceived load time of the page and LCP
Avoids enormous network payloads Total size was 1,357 KiB
Large network payloads cost users real money and are highly correlated with long load times
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Largest Contentful Paint 1.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted
Use efficient cache lifetimes Est savings of 3 KiB
A long cache lifetime can speed up repeat visits to your page
Cumulative Layout Shift 0.008
Cumulative Layout Shift measures the movement of visible elements within the viewport
Legacy JavaScript Est savings of 12 KiB
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile [Baseline](https://web.dev/articles/baseline-and-polyfills) features, unless you know you must support older browsers
Speed Index 1.0 s
Speed Index shows how quickly the contents of a page are visibly populated

Mobile

Mobile Screenshot
User Timing marks and measures 8 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Time to Interactive 8.3 s
Time to Interactive is the amount of time it takes for the page to become fully interactive
Largest Contentful Paint 8.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted
Use efficient cache lifetimes Est savings of 3 KiB
A long cache lifetime can speed up repeat visits to your page
Avoid long main-thread tasks 4 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Reduce unused JavaScript Est savings of 157 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
Initial server response time was short Root document took 20 ms
Keep the server response time for the main document short because all other requests depend on it
Legacy JavaScript Est savings of 12 KiB
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile [Baseline](https://web.dev/articles/baseline-and-polyfills) features, unless you know you must support older browsers
JavaScript execution time 0.5 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Avoids enormous network payloads Total size was 1,420 KiB
Large network payloads cost users real money and are highly correlated with long load times
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Minimizes main-thread work 0.8 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Total Blocking Time 140 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Max Potential First Input Delay 200 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Font display Est savings of 100 ms
Consider setting [font-display](https://developer.chrome.com/docs/performance/insights/font-display) to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with [font metric overrides](https://developer.chrome.com/blog/font-fallbacks).
Improve image delivery Est savings of 197 KiB
Reducing the download time of images can improve the perceived load time of the page and LCP
Speed Index 6.2 s
Speed Index shows how quickly the contents of a page are visibly populated
Reduce unused CSS Est savings of 15 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity
First Contentful Paint 2.7 s
First Contentful Paint marks the time at which the first text or image is painted

Speed And Optimization Tips

Website speed has a huge impact on performance, affecting user experience, conversion rates and even rankings. ‪‬‬By reducing page load-times, users are less likely to get distracted and the search engines are more likely to reward you by ranking you
Title Website
Congratulations! Your title is optimized
Description Website
Warning! Your description is not optimized
Robots.txt
Congratulations! Your site have a robots.txt file
Sitemap.xml
Congratulations! We've found a sitemap file for your website
SSL Secure
Congratulations! Your site have Support to HTTPS
Headings
Congratulations! You are using your H1 and H2 tags in your site
Blacklist
Congratulations! Your site is not listed in a blacklist
W3C Validator
Warning! Your site have errors W3C
Accelerated Mobile Pages (AMP)
Warning! Your site not have AMP Version
Domain Authority
Warning! Domain Authority of your website is slow. It is good to have domain authority more than 25.
GZIP Compress
Warning! Your site not is compressed, this can make slower response for the visitors
Favicon
Congratulations! Your website appears to have a favicon.
Broken Links
Congratulations! You not have broken links View links
First 10 Links Relationship HTTP Status
// krnl.to Internal Link 308
http://krnl.to/rss.xml Internal Link 308
newsletter Internal Link 308
members Internal Link 308
http://krnl.to/windows-containers-internals-introduction Internal Link 308
http://krnl.to/linux-containers-internals-runc Internal Link 308
http://krnl.to/linux-containers-internals-cgroups Internal Link 308
https://krnl.to/linux-containers-internals-namespaces Internal Link 200
https://krnl.to/linux-containers-internals-chroot-again Internal Link 200
https://krnl.to/linux-containers-internals-chroot Internal Link 200

Alexa Rank

99,999,999

Global Rank

99,999,999

-
Traffic
Search

Domain Available

Domain (TDL) and Typo Status
krnl.co Already Registered
krnl.us Available
krnl.com Already Registered
krnl.org Already Registered
krnl.net Already Registered
knl.to Available
irnl.to Available
ornl.to Available

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server 
HTTP/1.1 200 OK
Age: 0
Cache-Control: public, max-age=0, must-revalidate
Content-Encoding: gzip
Content-Security-Policy: default-src *; script-src * 'unsafe-eval' 'unsafe-inline'; style-src * 'unsafe-inline'; font-src *; img-src * data:
Content-Type: text/html; charset=utf-8
Date: Fri, 28 Nov 2025 08:21:39 GMT
Etag: W/"160nxyw6aty1tl9"
Referrer-Policy: origin-when-cross-origin
Server: Vercel
Strict-Transport-Security: max-age=63072000
X-Content-Type-Options: nosniff
X-Frame-Options: deny
X-Matched-Path: /
X-Powered-By: Next.js
X-Vercel-Cache: HIT
X-Vercel-Id: iad1:iad1:iad1::pdx1::6gl7r-1764318100156-7e95a21a116a
DNS Records DNS Resource Records associated with a hostname
View DNS Records
Type Name Value Class TTL
A krnl.to 76.76.21.21 IN 1731
NS krnl.to dns1.registrar-servers.com IN 1800
NS krnl.to dns2.registrar-servers.com IN 1800
MX krnl.to eforward2.registrar-servers.com IN 1800
MX krnl.to eforward1.registrar-servers.com IN 1800
MX krnl.to eforward4.registrar-servers.com IN 1800
MX krnl.to eforward5.registrar-servers.com IN 1800
MX krnl.to eforward3.registrar-servers.com IN 1800
TXT krnl.to v=spf1 include:spf.efwd.registrar-servers.com ~all IN 1800

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