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rock-crush.com screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 48% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

rock-crush.com

Welcome To Rock Crush.Com!

Page Load Speed

1.7 sec in total

First Response

438 ms

Resources Loaded

1 sec

Page Rendered

249 ms

rock-crush.com screenshot

About Website

Visit rock-crush.com now to see the best up-to-date Rock Crush content and also check out these interesting facts you probably never knew about rock-crush.com

Rock Crush Website. Mobile Friendly. ZX81, Rock Crush, 35th Anniversary Edition

Visit rock-crush.com

Key Findings

We analyzed Rock-crush.com page load time and found that the first response time was 438 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

rock-crush.com performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.1 s

1/100

10%

LCP (Largest Contentful Paint)

Value18.2 s

0/100

25%

SI (Speed Index)

Value7.1 s

32/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.025

100/100

15%

TTI (Time to Interactive)

Value12.7 s

13/100

10%

Network Requests Diagram

rock-crush.com

438 ms

index.htm

315 ms

rcbanner.png

104 ms

rockcrushbutton.jpg

285 ms

mavPwWowrpk

105 ms

Our browser made a total of 9 requests to load all elements on the main page. We found that 11% of them (1 request) were addressed to the original Rock-crush.com, 33% (3 requests) were made to Youtube.com and 33% (3 requests) were made to Pictureviewerpro.com. The less responsive or slowest element that took the longest time to load (438 ms) belongs to the original domain Rock-crush.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 333.8 kB (74%)

Content Size

450.2 kB

After Optimization

116.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Rock-crush.com main page is 450.2 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. CSS take 244.2 kB which makes up the majority of the site volume.

HTML Optimization

-48%

Potential reduce by 351 B

  • Original 728 B
  • After minification 727 B
  • After compression 377 B

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 351 B or 48% of the original size.

Image Optimization

-26%

Potential reduce by 2.6 kB

  • Original 10.2 kB
  • After minification 7.5 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, Rock Crush needs image optimization as it can save up to 2.6 kB or 26% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-66%

Potential reduce by 128.2 kB

  • Original 195.1 kB
  • After minification 195.1 kB
  • After compression 66.9 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 128.2 kB or 66% of the original size.

CSS Optimization

-83%

Potential reduce by 202.6 kB

  • Original 244.2 kB
  • After minification 244.1 kB
  • After compression 41.5 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. Rock-crush.com needs all CSS files to be minified and compressed as it can save up to 202.6 kB or 83% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

8

After Optimization

8

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 8 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rock Crush. According to our analytics all requests are already optimized.

Network Requests Diagram

rock-crush.com

rock-crush.com

438 ms

index.htm

index.htm

315 ms

rcbanner.png

rcbanner.png

104 ms

rockcrushbutton.jpg

rockcrushbutton.jpg

285 ms

mavPwWowrpk

mavPwWowrpk

105 ms

zGVb_phTwVc

zGVb_phTwVc

89 ms

s4WJBleFwys

s4WJBleFwys

88 ms

www-embed-player-vflfNyN_r.css

www-embed-player-vflfNyN_r.css

32 ms

www-embed-player.js

www-embed-player.js

58 ms

Accessibility Review

rock-crush.com accessibility score

79

Accessibility Issues

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

Form elements do not have associated labels

Best Practices

rock-crush.com best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

rock-crush.com SEO score

83

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

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

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

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 Rock-crush.com 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 Rock-crush.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

rock-crush.com

Open Graph description is not detected on the main page of Rock Crush. 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: