Tools & Wizards About Us
z80.eu screenshot

Report Summary

  • 97

    Performance

    Renders faster than
    94% of other websites

  • 52

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

z80.eu

z80.eu

Page Load Speed

1.2 sec in total

First Response

304 ms

Resources Loaded

734 ms

Page Rendered

206 ms

z80.eu screenshot

About Website

Click here to check amazing Z 80 content for Canada. Otherwise, check out these important facts you probably never knew about z80.eu

Vintage Computer site and blog and also IT security related information

Visit z80.eu

Key Findings

We analyzed Z80.eu page load time and found that the first response time was 304 ms and then it took 940 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

z80.eu performance score

97

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.9 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.5 s

100/100

25%

SI (Speed Index)

Value1.1 s

100/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.127

82/100

15%

TTI (Time to Interactive)

Value1.6 s

100/100

10%

Network Requests Diagram

z80.eu

304 ms

counter_xhtml.js

26 ms

nth_theme_blue_blue13_bg.gif

98 ms

nav_20_index_bhb.gif

397 ms

nav_21_index_btn_homeh.gif

218 ms

Our browser made a total of 17 requests to load all elements on the main page. We found that 88% of them (15 requests) were addressed to the original Z80.eu, 6% (1 request) were made to Statcounter.com and 6% (1 request) were made to C.statcounter.com. The less responsive or slowest element that took the longest time to load (430 ms) belongs to the original domain Z80.eu.

Page Optimization Overview & Recommendations

Page size can be reduced by 14.1 kB (66%)

Content Size

21.5 kB

After Optimization

7.3 kB

  • HTML
  • Images

In fact, the total size of Z80.eu main page is 21.5 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. 15% of websites need less resources to load. HTML takes 18.2 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 14.0 kB

  • Original 18.2 kB
  • After minification 15.6 kB
  • After compression 4.2 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 2.7 kB, which is 15% 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 14.0 kB or 77% of the original size.

Image Optimization

-4%

Potential reduce by 131 B

  • Original 3.3 kB
  • After minification 3.1 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. Z 80 images are well optimized though.

Requests Breakdown

Number of requests can be reduced by 8 (50%)

Requests Now

16

After Optimization

8

  • AJAX
  • Images
  • JavaScript

The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Z 80. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

z80.eu

z80.eu

304 ms

counter_xhtml.js

counter_xhtml.js

26 ms

nth_theme_blue_blue13_bg.gif

nth_theme_blue_blue13_bg.gif

98 ms

nav_20_index_bhb.gif

nav_20_index_bhb.gif

397 ms

nav_21_index_btn_homeh.gif

nav_21_index_btn_homeh.gif

218 ms

nav_21_projects_th.gif

nav_21_projects_th.gif

195 ms

nav_21_commodore_th.gif

nav_21_commodore_th.gif

195 ms

nav_21_16bit_th.gif

nav_21_16bit_th.gif

202 ms

nav_21_cpmcomp_th.gif

nav_21_cpmcomp_th.gif

203 ms

nav_21_cpmsoft_th.gif

nav_21_cpmsoft_th.gif

292 ms

z80.eu.png

z80.eu.png

292 ms

nth_theme_blue_blue13_hr.gif

nth_theme_blue_blue13_hr.gif

332 ms

nth_theme_blue_blue13_bullet_l.gif

nth_theme_blue_blue13_bullet_l.gif

313 ms

kbutton.gif

kbutton.gif

430 ms

nth_theme_blue_blue13_new.gif

nth_theme_blue_blue13_new.gif

405 ms

nth_theme_blue_blue13_bullet_s.gif

nth_theme_blue_blue13_bullet_s.gif

390 ms

t.php

t.php

75 ms

Accessibility Review

z80.eu accessibility score

52

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.

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

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

z80.eu best practices score

67

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

z80.eu SEO score

62

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

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • 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 Z80.eu can be misinterpreted by Google and other search engines. Our service has detected that English 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 Z80.eu 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

z80.eu

Open Graph description is not detected on the main page of Z 80. 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: