Report Summary

  • 13

    Performance

    Renders faster than
    25% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 81% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 76

    SEO

    Google-friendlier than
    35% of websites

zumzum.rs

Servis i prodaja računara | Zum Zum - servis i prodaja r...

Page Load Speed

28.6 sec in total

First Response

479 ms

Resources Loaded

27.8 sec

Page Rendered

304 ms

zumzum.rs screenshot

About Website

Click here to check amazing Zum content. Otherwise, check out these important facts you probably never knew about zumzum.rs

Servis i prodaja računara | |Zum Zum - servis i prodaja računara | Niš Srbija | Zum Zum - servis i prodaja računara zumzum.rs ...

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Key Findings

We analyzed Zumzum.rs page load time and found that the first response time was 479 ms and then it took 28.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

zumzum.rs performance score

13

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.7 s

5/100

10%

LCP (Largest Contentful Paint)

Value15.4 s

0/100

25%

SI (Speed Index)

Value17.3 s

0/100

10%

TBT (Total Blocking Time)

Value1,650 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.203

61/100

15%

TTI (Time to Interactive)

Value19.8 s

2/100

10%

Network Requests Diagram

zumzum.rs

479 ms

zumzum.rs

3918 ms

bootstrap.min.css

10680 ms

alertify.core.css

12736 ms

alertify.custom.css

2150 ms

Our browser made a total of 522 requests to load all elements on the main page. We found that 99% of them (515 requests) were addressed to the original Zumzum.rs, 0% (2 requests) were made to Fonts.googleapis.com and 0% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (12.7 sec) belongs to the original domain Zumzum.rs.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.7 MB (22%)

Content Size

12.1 MB

After Optimization

9.4 MB

In fact, the total size of Zumzum.rs main page is 12.1 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. Only a small number of websites need less resources to load. Images take 10.3 MB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 1.1 MB

  • Original 1.2 MB
  • After minification 747.4 kB
  • After compression 112.0 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 465.8 kB, which is 38% 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 1.1 MB or 91% of the original size.

Image Optimization

-14%

Potential reduce by 1.5 MB

  • Original 10.3 MB
  • After minification 8.9 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, Zum needs image optimization as it can save up to 1.5 MB 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

-16%

Potential reduce by 82.1 kB

  • Original 498.5 kB
  • After minification 498.5 kB
  • After compression 416.3 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 82.1 kB or 16% of the original size.

CSS Optimization

-44%

Potential reduce by 30.5 kB

  • Original 69.2 kB
  • After minification 40.3 kB
  • After compression 38.7 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. Zumzum.rs needs all CSS files to be minified and compressed as it can save up to 30.5 kB or 44% of the original size.

Requests Breakdown

Number of requests can be reduced by 41 (8%)

Requests Now

518

After Optimization

477

The browser has sent 518 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

zumzum.rs accessibility score

93

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

Best Practices

zumzum.rs best practices score

67

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

zumzum.rs SEO score

76

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

High

robots.txt is not valid

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    SR

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zumzum.rs can be misinterpreted by Google and other search engines. Our service has detected that Serbian is used on the page, and it does not match the claimed English language. Our system also found out that Zumzum.rs 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 data is detected on the main page of Zum. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: