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sedrez.com screenshot

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

sedrez.com

Lise Sedrez - Teaching Environmental History

Page Load Speed

612 ms in total

First Response

133 ms

Resources Loaded

345 ms

Page Rendered

134 ms

sedrez.com screenshot

About Website

Click here to check amazing Sedrez content. Otherwise, check out these important facts you probably never knew about sedrez.com

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Key Findings

We analyzed Sedrez.com page load time and found that the first response time was 133 ms and then it took 479 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

sedrez.com performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.8 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.4 s

100/100

25%

SI (Speed Index)

Value0.8 s

100/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value0.8 s

100/100

10%

Network Requests Diagram

sedrez.com

133 ms

sedrez02c.css

78 ms

baia_steinmann01axs1.jpg

136 ms

white780.gif

100 ms

R0013144aw.jpg

116 ms

Our browser made a total of 5 requests to load all elements on the main page. We found that all of those requests were addressed to Sedrez.com and no external sources were called. The less responsive or slowest element that took the longest time to load (136 ms) belongs to the original domain Sedrez.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 7.8 kB (17%)

Content Size

47.1 kB

After Optimization

39.4 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Sedrez.com main page is 47.1 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 36.2 kB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 4.0 kB

  • Original 6.1 kB
  • After minification 5.1 kB
  • After compression 2.1 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 965 B, which is 16% 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 4.0 kB or 66% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 36.2 kB
  • After minification 36.2 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. Sedrez images are well optimized though.

CSS Optimization

-78%

Potential reduce by 3.8 kB

  • Original 4.8 kB
  • After minification 3.4 kB
  • After compression 1.1 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. Sedrez.com needs all CSS files to be minified and compressed as it can save up to 3.8 kB or 78% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

4

After Optimization

4

  • Images
  • CSS

The browser has sent 4 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sedrez. According to our analytics all requests are already optimized.

Network Requests Diagram

sedrez.com

sedrez.com

133 ms

sedrez02c.css

sedrez02c.css

78 ms

baia_steinmann01axs1.jpg

baia_steinmann01axs1.jpg

136 ms

white780.gif

white780.gif

100 ms

R0013144aw.jpg

R0013144aw.jpg

116 ms

Accessibility Review

sedrez.com accessibility score

69

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

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

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

Best Practices

sedrez.com best practices score

75

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

sedrez.com SEO score

85

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

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 Sedrez.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 Sedrez.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

sedrez.com

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