Tools & Wizards About Us

Report Summary

  • 27

    Performance

    Renders faster than
    47% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

zwik.lodz.pl

Zakład Wodociągów i Kanalizacji sp. z o.o. w Łodzi portal informacyjny

Page Load Speed

4 sec in total

First Response

504 ms

Resources Loaded

3.1 sec

Page Rendered

418 ms

About Website

Click here to check amazing Zwik Lodz content for Poland. Otherwise, check out these important facts you probably never knew about zwik.lodz.pl

Oficjalna strona Zakładu Wodociągów i Kanalizacji sp. z o.o. w Łodzi

Visit zwik.lodz.pl

Key Findings

We analyzed Zwik.lodz.pl page load time and found that the first response time was 504 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

zwik.lodz.pl performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

20/100

10%

LCP (Largest Contentful Paint)

Value4.4 s

39/100

25%

SI (Speed Index)

Value11.7 s

4/100

10%

TBT (Total Blocking Time)

Value4,530 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.062

97/100

15%

TTI (Time to Interactive)

Value22.8 s

1/100

10%

Network Requests Diagram

zwik.lodz.pl

504 ms

www.zwik.lodz.pl

483 ms

style.css

117 ms

funkcje.js

230 ms

jquery.js

366 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 94% of them (60 requests) were addressed to the original Zwik.lodz.pl, 3% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Zwik.lodz.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 448.7 kB (23%)

Content Size

1.9 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zwik.lodz.pl main page is 1.9 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 20.5 kB

  • Original 28.1 kB
  • After minification 27.7 kB
  • After compression 7.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 20.5 kB or 73% of the original size.

Image Optimization

-16%

Potential reduce by 267.6 kB

  • Original 1.7 MB
  • After minification 1.4 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Zwik Lodz needs image optimization as it can save up to 267.6 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-70%

Potential reduce by 141.8 kB

  • Original 203.9 kB
  • After minification 176.1 kB
  • After compression 62.1 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 141.8 kB or 70% of the original size.

CSS Optimization

-82%

Potential reduce by 18.9 kB

  • Original 23.1 kB
  • After minification 20.1 kB
  • After compression 4.2 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Zwik.lodz.pl needs all CSS files to be minified and compressed as it can save up to 18.9 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (16%)

Requests Now

61

After Optimization

51

  • Images
  • JavaScript
  • CSS

The browser has sent 61 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zwik Lodz. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

zwik.lodz.pl accessibility score

98

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Best Practices

zwik.lodz.pl best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

zwik.lodz.pl SEO score

98

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    PL

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zwik.lodz.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Zwik.lodz.pl main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Zwik Lodz. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: