Tools & Wizards About Us
concertonet.com screenshot

Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

concertonet.com

ConcertoNet.com - The Classical Music Network

Page Load Speed

2.9 sec in total

First Response

484 ms

Resources Loaded

1.3 sec

Page Rendered

1.1 sec

concertonet.com screenshot

About Website

Welcome to concertonet.com homepage info - get ready to check Concerto Net best content for Czech Republic right away, or after learning these important things about concertonet.com

Homepage of ConcertoNet.com, the Classical Music Network

Visit concertonet.com

Key Findings

We analyzed Concertonet.com page load time and found that the first response time was 484 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

concertonet.com performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.0 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.6 s

99/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value1,250 ms

19/100

30%

CLS (Cumulative Layout Shift)

Value0.031

100/100

15%

TTI (Time to Interactive)

Value7.4 s

49/100

10%

Network Requests Diagram

concertonet.com

484 ms

style.css

177 ms

show_ads.js

5 ms

ga.js

41 ms

tNQ6cK.jpg

304 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 21% of them (3 requests) were addressed to the original Concertonet.com, 29% (4 requests) were made to Pagead2.googlesyndication.com and 14% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (484 ms) belongs to the original domain Concertonet.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 79.2 kB (48%)

Content Size

165.2 kB

After Optimization

85.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Concertonet.com main page is 165.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. HTML takes 86.8 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 70.3 kB

  • Original 86.8 kB
  • After minification 81.1 kB
  • After compression 16.4 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 70.3 kB or 81% of the original size.

Image Optimization

-14%

Potential reduce by 6.3 kB

  • Original 43.7 kB
  • After minification 37.4 kB

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, Concerto Net needs image optimization as it can save up to 6.3 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 159 B

  • Original 31.8 kB
  • After minification 31.7 kB
  • After compression 31.7 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. This website has mostly compressed JavaScripts.

CSS Optimization

-85%

Potential reduce by 2.4 kB

  • Original 2.9 kB
  • After minification 2.4 kB
  • After compression 432 B

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. Concertonet.com needs all CSS files to be minified and compressed as it can save up to 2.4 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (33%)

Requests Now

12

After Optimization

8

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Concerto Net. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

concertonet.com

concertonet.com

484 ms

style.css

style.css

177 ms

show_ads.js

show_ads.js

5 ms

ga.js

ga.js

41 ms

tNQ6cK.jpg

tNQ6cK.jpg

304 ms

ca-pub-5747139296579672.js

ca-pub-5747139296579672.js

137 ms

zrt_lookup.html

zrt_lookup.html

136 ms

show_ads_impl.js

show_ads_impl.js

67 ms

concertonet.jpg

concertonet.jpg

130 ms

88x31.png

88x31.png

148 ms

__utm.gif

__utm.gif

76 ms

ads

ads

273 ms

osd.js

osd.js

12 ms

tNQ6cK.jpg

tNQ6cK.jpg

459 ms

Accessibility Review

concertonet.com accessibility score

55

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

concertonet.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

concertonet.com SEO score

69

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Concertonet.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Concertonet.com main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

concertonet.com

Open Graph description is not detected on the main page of Concerto Net. 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: