jarekrozanski.eu Jarekrozanski.eu

   
Jarek Rozanski - Scala, Java, Search, and Distributed Systems Engineer

Domain Summary

What IP addresses does Jarekrozanski.eu resolve to?

• Jarekrozanski.eu resolves to the IP addresses 2001:41d0:301:1::31, 151.80.4.219.

Where are Jarekrozanski.eu servers located in?

• Jarekrozanski.eu has servers located in Roubaix, North, France.

jarekrozanski.eu Profile

Title:Jarek Rozanski - Scala, Java, Search, and Distributed Systems Engineer Description:Hi, I am Jarek 👋, how are you? I am a Software Engineer and an experienced Engineering Manager—a builder of specialized teams. The technology I use daily evolves around JVM, including Java, Scala, and Kotlin. Here are just a few keywords to help you discover my profile: Java, Scala, Kotlin, Solr, Kafka, RabbitMQ, Node, Vue.js, Spark.
Tags:

What technologies does jarekrozanski.eu use?

These are the technologies used at jarekrozanski.eu. jarekrozanski.eu has a total of 3 technologies installed in 2 different categories.

jarekrozanski.eu Traffic Analysis

There's no enough data about jarekrozanski.eu traffic.
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Monthly Visits n/a
Pages per Visit n/a
Visit duration n/a
Bounce Rate n/a
Is this your site?Verify your site's metrics.
Daily Unique Visitors:
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Monthly Visits:
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Pages per Visit:
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Daily Pageviews:
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Avg. visit duration:
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Bounce rate:
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Global Reach:
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HypeRank:
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*All traffic values are estimates only.
Last update was 3 days ago
     
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*HypeStat.com is not promoting or affiliated with jarekrozanski.eu in any way. Only publicly available statistics data are displayed.

 

SEMrush is a complete on line advertising and marketing platform that gives a extensive variety of gear and functions to help companies and entrepreneurs in enhancing their on line visibility and optimizing their virtual advertising and marketing strategies.
SemRushSemRush
Domain:
  jarekrozanski.eu
Rank:
(Rank based on keywords, cost and organic traffic)
  n/a
Organic Keywords:
(Number of keywords in top 20 Google SERP)
  0
Organic Traffic:
(Number of visitors coming from top 20 search results)
  0
Organic Cost:
((How much need to spend if get same number of visitors from Google Adwords)
  $0.00

Ad Experience Report

Summary of the ad experience rating of a website for a specific platform.

Mobile summary

Root domain:
jarekrozanski.eu
Ad filtering:
(Chrome is not filtering ads on your site.)
Off
Status:
(The status of the site that is reviewed for the Better Ads Standards.)
Not reviewed

Desktop summary

Root domain:
jarekrozanski.eu
Ad filtering:
(Chrome is not filtering ads on your site.)
Off
Status:
(The status of the site that is reviewed for the Better Ads Standards.)
Not reviewed

Abusive Experience Report

Summary of the abusive experience rating of a website.
Root domain:
jarekrozanski.eu
Enforcement:
(Chrome is not preventing your site from opening new windows or tabs.)
Off
Status:
(The status of the site reviewed for the abusive experiences.)
Not reviewed

Where is jarekrozanski.eu hosted?

Jarekrozanski.eu may be hosted in multiple data centers distributed in different locations around the world. This is probably just one of them.
Server IP:
2001:41d0:301:1::31, 151.80.4.219
ASN:
AS16276 
ISP:
OVH SAS 
Server Location:
Roubaix
North, 59
France, FR
 

Other sites hosted on 151.80.4.219

How fast does jarekrozanski.eu load?

The average loading time of jarekrozanski.eu is 50 ms. The Desktop speed index is 100 and mobile speed index is 97.
Average Load Time:
50 ms

Page Speed (Google PageSpeed Insights) - Desktop

100
0-49 50-89 90-100 i

Field Data

Over the last 30 days, the field data shows that this page has a speed compared to other pages in the Chrome User Experience Report.We are showing the 90th percentile of FCP and the 95th percentile of FID.

Cumulative Layout Shift (CLS)0 0% of loads for this page have a fast (<0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have an average (0s ~ 0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have a slow (>0s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)0 0% of loads for this page have a fast (<0s) Time To First Byte (TTFB) 0% 0% of loads for this page have an average (0s ~ 0s) Time To First Byte (TTFB) 0% 0% of loads for this page have a slow (>0s) Time To First Byte (TTFB) 0%
First Contentful Paint (FCP)0 0% of loads for this page have a fast (<0s) First Contentful Paint (FCP) 0% 0% of loads for this page have an average (0s ~ 0s) First Contentful Paint (FCP) 0% 0% of loads for this page have a slow (>0s) First Contentful Paint (FCP) 0%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average (0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interaction To Next Paint (INP)0 0% of loads for this page have a fast (<0ms) Interaction To Next Paint (INP) 0% 0% of loads for this page have an average (0ms ~ 0ms) Interaction To Next Paint (INP) 0% 0% of loads for this page have a slow (>0ms) Interaction To Next Paint (INP) 0%
Largest Contentful Paint (LCP)0 0% of loads for this page have a fast (<0ms) Largest Contentful Paint (LCP) 0% 0% of loads for this page have an average (0ms ~ 0ms) Largest Contentful Paint (LCP) 0% 0% of loads for this page have a slow (>0ms) Largest Contentful Paint (LCP) 0%

Origin Data

All pages served from this origin have an speed compared to other pages in the Chrome User Experience Report. over the last 30 days.To view suggestions tailored to each page, analyze individual page URLs.

Cumulative Layout Shift (CLS)0 0% of loads for this page have a fast (<0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have an average (0s ~ 0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have a slow (>0s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)0 0% of loads for this page have a fast (<0s) Time To First Byte (TTFB) 0% 0% of loads for this page have an average (0s ~ 0s) Time To First Byte (TTFB) 0% 0% of loads for this page have a slow (>0s) Time To First Byte (TTFB) 0%
First Contentful Paint (FCP)0 0% of loads for this page have a fast (<0s) First Contentful Paint (FCP) 0% 0% of loads for this page have an average (0s ~ 0s) First Contentful Paint (FCP) 0% 0% of loads for this page have a slow (>0s) First Contentful Paint (FCP) 0%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average 0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interaction To Next Paint (INP)0 0% of loads for this page have a fast (<0ms) Interaction To Next Paint (INP) 0% 0% of loads for this page have an average (0ms ~ 0ms) Interaction To Next Paint (INP) 0% 0% of loads for this page have a slow (>0ms) Interaction To Next Paint (INP) 0%
Largest Contentful Paint (LCP)0 0% of loads for this page have a fast (<0ms) Largest Contentful Paint (LCP) 0% 0% of loads for this page have an average (0ms ~ 0ms) Largest Contentful Paint (LCP) 0% 0% of loads for this page have a slow (>0ms) Largest Contentful Paint (LCP) 0%

Lab Data

Largest Contentful Paint 0.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric
Total Blocking Time 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric
INP by phase  
Start investigating with the longest phase. To reduce processing duration, , often JS. Delays can be minimized optimize the main-thread costs
First Contentful Paint 0.2 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric
Time to Interactive 0.6 s
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric
Speed Index 0.2 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric
First Meaningful Paint  
First Meaningful Paint measures when the primary content of a page is visible. Learn more about the First Meaningful Paint metric
Font display  
Consider setting to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with . font-display font metric overrides
Duplicated JavaScript  
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Legacy JavaScript  
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 features, unless you know you must support older browsers. Baseline Learn why most sites can deploy ES6+ code without transpiling
Max Potential First Input Delay 20 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric
Lazy load third-party resources with facades  
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required. Learn how to defer third-parties with a facade

Page Speed (Google PageSpeed Insights) - Mobile

97
0-49 50-89 90-100 i

Field Data

Over the last 30 days, the field data shows that this page has a speed compared to other pages in the Chrome User Experience Report.We are showing the 90th percentile of FCP and the 95th percentile of FID.

Cumulative Layout Shift (CLS)0 0% of loads for this page have a fast (<0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have an average (0s ~ 0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have a slow (>0s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)0 0% of loads for this page have a fast (<0s) Time To First Byte (TTFB) 0% 0% of loads for this page have an average (0s ~ 0s) Time To First Byte (TTFB) 0% 0% of loads for this page have a slow (>0s) Time To First Byte (TTFB) 0%
First Contentful Paint (FCP)0 0% of loads for this page have a fast (<0s) First Contentful Paint (FCP) 0% 0% of loads for this page have an average (0s ~ 0s) First Contentful Paint (FCP) 0% 0% of loads for this page have a slow (>0s) First Contentful Paint (FCP) 0%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average (0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interactive To Next Paint (INP)0 0% of loads for this page have a fast (<0s) Interactive To Next Paint (INP) 0% 0% of loads for this page have an average (0s ~ 0s) Interactive To Next Paint (INP) 0% 0% of loads for this page have a slow (>0s) Interactive To Next Paint (INP) 0%
Largest Contentful Paint (LCP)0 0% of loads for this page have a fast (<0s) Largest Contentful Paint (LCP) 0% 0% of loads for this page have an average (0s ~ 0s) Largest Contentful Paint (LCP) 0% 0% of loads for this page have a slow (>0s) Largest Contentful Paint (LCP) 0%

Origin Data

All pages served from this origin have an speed compared to other pages in the Chrome User Experience Report. over the last 30 days.To view suggestions tailored to each page, analyze individual page URLs.

Cumulative Layout Shift (CLS)0 0% of loads for this page have a fast (<0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have an average (0s ~ 0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have a slow (>0s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)0 0% of loads for this page have a fast (<0s) Time To First Byte (TTFB) 0% 0% of loads for this page have an average (0s ~ 0s) Time To First Byte (TTFB) 0% 0% of loads for this page have a slow (>0s) Time To First Byte (TTFB) 0%
First Contentful Paint (FCP)0 0% of loads for this page have a fast (<0s) First Contentful Paint (FCP) 0% 0% of loads for this page have an average (0s ~ 0s) First Contentful Paint (FCP) 0% 0% of loads for this page have a slow (>0s) First Contentful Paint (FCP) 0%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average 0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interactive To Next Paint (INP)0 0% of loads for this page have a fast (<0s) Interactive To Next Paint (INP) 0% 0% of loads for this page have an average (0s ~ 0s) Interactive To Next Paint (INP) 0% 0% of loads for this page have a slow (>0s) Interactive To Next Paint (INP) 0%
Largest Contentful Paint (LCP)0 0% of loads for this page have a fast (<0s)Largest Contentful Paint (LCP) 0% 0% of loads for this page have an average (0s ~ 0s)Largest Contentful Paint (LCP) 0% 0% of loads for this page have a slow (>0s)Largest Contentful Paint (LCP) 0%

Lab Data

First Contentful Paint 0.9 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric
Max Potential First Input Delay 20 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric
Total Blocking Time 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric
Speed Index 0.9 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric
INP by phase  
Start investigating with the longest phase. To reduce processing duration, , often JS. Delays can be minimized optimize the main-thread costs
Duplicated JavaScript  
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Time to Interactive 2.6 s
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric
First Meaningful Paint  
First Meaningful Paint measures when the primary content of a page is visible. Learn more about the First Meaningful Paint metric
Lazy load third-party resources with facades  
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required. Learn how to defer third-parties with a facade
Font display  
Consider setting to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with . font-display font metric overrides
Legacy JavaScript  
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 features, unless you know you must support older browsers. Baseline Learn why most sites can deploy ES6+ code without transpiling
Largest Contentful Paint 2.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric

Does jarekrozanski.eu use compression?

Website compression is the process of reducing the size of website files, such as HTML, CSS, JavaScript, and image files, to improve website performance and load times. Compressing website files can significantly reduce the amount of data that needs to be transferred from the server to the user's browser, resulting in faster page load times and improved user experience. Files on jarekrozanski.eu are reduced by 66%.
jarekrozanski.eu use gzip compression.
Original size: 6.46 KB
Compressed size: 2.17 KB
File reduced by: 4.29 KB (66%)

Google Safe Browsing

Google Safe Browsing is a service provided by Google that helps protect users from visiting websites that may contain malicious or harmful content, such as malware, phishing attempts, or deceptive software.
This site is not currently listed as suspicious

MyWot.com Reputation Ratings

MyWOT (short for "My Web of Trust") is a web-based reputation and rating service that provides users with information about the trustworthiness and safety of websites.
Status:
  UNKNOWN

SSL Checker - SSL Certificate Verify

An SSL (Secure Sockets Layer) certificate is a digital certificate that establishes a secure encrypted connection between a web server and a user's web browser. It provides authentication and encryption, ensuring that data transmitted between the server and the browser remains private and protected. jarekrozanski.eu supports HTTPS.
 jarekrozanski.eu supports HTTPS
     
Verifying SSL Support. Please wait...
Common Name: inputobjects.eu
Organization:
Location:
Issuer: E6
Valid from: Apr 21 04:45:06 2025 GMT
Valid until: Jul 20 04:45:05 2025 GMT
Authority: CA:FALSE
Keysize:
Common Name: E6
Organization: Let's Encrypt
Location: US
Issuer: ISRG Root X1
Valid from: Mar 13 00:00:00 2024 GMT
Valid until: Mar 12 23:59:59 2027 GMT
Authority: CA:TRUE
Keysize:

Verify HTTP/2 Support

HTTP/2 (Hypertext Transfer Protocol version 2) is a major revision of the HTTP protocol, which is the foundation of data communication on the World Wide Web. It was developed as an improvement over the previous HTTP/1.1 version to enhance web performance and efficiency.
 jarekrozanski.eu supports HTTP/2
     
Verifying HTTP/2.0 Support. Please wait...

Http Header

HTTP headers are extra portions of records despatched among a consumer (which include an internet browser) and a server at some stage in an HTTP request or response. They offer instructions, metadata, or manipulate parameters for the conversation among the consumer and server.
date: Thu, 12 Jun 2025 19:31:40 GMT
content-type: text/html
content-length: 2221
server: OVHcloud
accept-ranges: none
vary: Accept-Encoding
content-encoding: gzip

DNS Lookup

DNS entries (Domain Name System) are a critical component of the Internet infrastructure. They act as directories that translate human-readable domain names (such as example.com) to machine-readable IP addresses. DNS records are stored on DNS servers and help forward internet traffic efficiently.
Type Ip Target/Txt TTL
A 151.80.4.219 10800
AAAA 2001:41d0:301:1::31 10800
MX in1-smtp.messagingengine.com 10800
MX in2-smtp.messagingengine.com 10800
TXT v=spf1 include:spf.messagingengine.com ?all 10800
NS ns-236-a.gandi.net 10800
NS ns-122-b.gandi.net 10800
NS ns-128-c.gandi.net 10800
SOA 10800
Mname ns1.gandi.net
Rname hostmaster.gandi.net
Serial Number 1749686400
Refresh 10800
Retry 3600
Expire 604800
Minimum TTL 10800

Whois Lookup

Domain WHOIS is a public database that provides information about domain names, including registered owners, contact information, domain registrars, registration and expiration dates, name servers, and other relevant information.
Domain Registrar:
GANDI
Domain Owner:
NOT DISCLOSED!
WhoIs:
 

% The WHOIS service offered by EURid and the access to the records
% in the EURid WHOIS database are provided for information purposes
% only. It allows persons to check whether a specific domain name
% is still available or not and to obtain information related to
% the registration records of existing domain names.
%
% EURid cannot, under any circumstances, be held liable in case the
% stored information would prove to be wrong, incomplete or not
% accurate in any sense.
%
% By submitting a query, you agree not to use the information made
% available to:
%
% - allow, enable or otherwise support the transmission of unsolicited,
%   commercial advertising or other solicitations whether via email or
%   otherwise;
% - target advertising in any possible way;
% - cause nuisance in any possible way by sending messages to registrants,
%   whether by automated, electronic processes capable of enabling
%   high volumes or by other possible means.
%
% Without prejudice to the above, it is explicitly forbidden to extract,
% copy and/or use or re-utilise in any form and by any means
% (electronically or not) the whole or a quantitatively or qualitatively
% substantial part of the contents of the WHOIS database without prior
% and explicit permission by EURid, nor in any attempt hereof, to apply
% automated, electronic processes to EURid (or its systems).
%
% You agree that any reproduction and/or transmission of data for
% commercial purposes will always be considered as the extraction of a
% substantial part of the content of the WHOIS database.
%
% By submitting the query, you agree to abide by this policy and accept
% that EURid can take measures to limit the use of its WHOIS services
% to protect the privacy of its registrants or the integrity
% of the database.
%
% The EURid WHOIS service on port 43 (textual WHOIS) never discloses
% any information concerning the registrant.
% Registrant and on-site contact information can be obtained through use of the
% web-based WHOIS service available from the EURid website www.eurid.eu
%
% WHOIS jarekrozanski.eu
Domain: jarekrozanski.eu
Script: LATIN

Registrant:
        NOT DISCLOSED!
        Visit www.eurid.eu for the web-based WHOIS.

Technical:
        Organisation: Gandi SAS
        Language: fr
        Email: email

Registrar:
        Name: GANDI
        Website: https://www.gandi.net

Name servers:
        ns-236-a.gandi.net
        ns-128-c.gandi.net
        ns-122-b.gandi.net

Please visit www.eurid.eu for more info.