Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 73

    SEO

    Google-friendlier than
    31% of websites

scheme.com

(chez (chez scheme))

Page Load Speed

440 ms in total

First Response

123 ms

Resources Loaded

239 ms

Page Rendered

78 ms

scheme.com screenshot

About Website

Welcome to scheme.com homepage info - get ready to check Scheme best content for Cambodia right away, or after learning these important things about scheme.com

Scheme programming and Scheme language tools and documentation: Chez Scheme, Petite Chez Scheme, the Scheme Widget Library, The Scheme Programming Language, and the Chez Scheme User's Guide

Visit scheme.com

Key Findings

We analyzed Scheme.com page load time and found that the first response time was 123 ms and then it took 317 ms to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

scheme.com performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.2 s

99/100

10%

LCP (Largest Contentful Paint)

Value1.2 s

100/100

25%

SI (Speed Index)

Value1.2 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.2 s

100/100

10%

Network Requests Diagram

scheme.com

123 ms

site.css

103 ms

Our browser made a total of 2 requests to load all elements on the main page. We found that all of those requests were addressed to Scheme.com and no external sources were called. The less responsive or slowest element that took the longest time to load (123 ms) belongs to the original domain Scheme.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 5.7 kB (72%)

Content Size

7.8 kB

After Optimization

2.2 kB

In fact, the total size of Scheme.com main page is 7.8 kB. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. CSS take 4.6 kB which makes up the majority of the site volume.

HTML Optimization

-63%

Potential reduce by 1.9 kB

  • Original 3.1 kB
  • After minification 3.0 kB
  • After compression 1.2 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. 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 1.9 kB or 63% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 149 B
  • After minification 149 B

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. Scheme images are well optimized though.

CSS Optimization

-81%

Potential reduce by 3.7 kB

  • Original 4.6 kB
  • After minification 3.4 kB
  • After compression 880 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. Scheme.com needs all CSS files to be minified and compressed as it can save up to 3.7 kB or 81% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

1

After Optimization

1

The browser has sent 1 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Scheme. According to our analytics all requests are already optimized.

Accessibility Review

scheme.com accessibility score

83

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

scheme.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

scheme.com SEO score

73

Search Engine Optimization Advices

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 Scheme.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 Scheme.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

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