Access spark.cz. Potápění Chorvatsko, potápěčské kurzy v Chorvatsku, kurzy potápění

Report Summary

About Website

Welcome to spark.cz homepage info - get ready to check Spark best content right away, or after learning these important things about spark.cz

Potápění Chorvatsko, kurzy potápění v Chorvatsku - Pakoštane, Maledivy, Galapágy, safari Egypt, Hurghada, Dahab. OWD, AOWD, NITROX.

Visit spark.cz

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

11/100

10%

LCP (Largest Contentful Paint)

Value13.3 s

0/100

25%

SI (Speed Index)

Value6.9 s

33/100

10%

TBT (Total Blocking Time)

Value360 ms

72/100

30%

CLS (Cumulative Layout Shift)

Value0.012

100/100

15%

TTI (Time to Interactive)

Value12.1 s

16/100

10%

www.potapeni-online.cz

879 ms

all.css

49 ms

css

58 ms

nice-select.css

96 ms

bootstrap.css

289 ms

Our browser made a total of 81 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Spark.cz, 10% (8 requests) were made to Cdnjs.cloudflare.com and 6% (5 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (2.4 sec) relates to the external source Potapeni-online.cz.

Content Size

7.8 MB

After Optimization

7.3 MB

In fact, the total size of Spark.cz main page is 7.8 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 7.4 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 71.5 kB

Original 82.1 kB
After minification 62.3 kB
After compression 10.6 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. This page needs HTML code to be minified as it can gain 19.8 kB, which is 24% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 71.5 kB or 87% of the original size.

Image Optimization

-4%

Potential reduce by 274.0 kB

Original 7.4 MB
After minification 7.1 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. Spark images are well optimized though.

JavaScript Optimization

-33%

Potential reduce by 63.5 kB

Original 191.0 kB
After minification 190.9 kB
After compression 127.5 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 63.5 kB or 33% of the original size.

CSS Optimization

-38%

Potential reduce by 49.4 kB

Original 129.8 kB
After minification 129.7 kB
After compression 80.5 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. Spark.cz needs all CSS files to be minified and compressed as it can save up to 49.4 kB or 38% of the original size.

Requests Now

After Optimization

The browser has sent 71 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Spark. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 32 to 1 for JavaScripts and from 19 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

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

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.

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

CS
Language Claimed

CS
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Spark.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Spark.cz 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

spark.cz

Open Graph data is detected on the main page of Spark. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

Potápění Chorvatsko, potápěčské kurzy v Chorvatsku, kurzy potápění

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)