Tools & Wizards About Us
sarsreference.com screenshot

Report Summary

  • 75

    Performance

    Renders faster than
    84% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 92% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

sarsreference.com

Index of /

Page Load Speed

896 ms in total

First Response

215 ms

Resources Loaded

589 ms

Page Rendered

92 ms

sarsreference.com screenshot

About Website

Welcome to sarsreference.com homepage info - get ready to check Sarsreference best content right away, or after learning these important things about sarsreference.com

SARS Reference is a medical textbook that provides a comprehensive and up-to-date overview of severe acute respiratory syndrome (SARS). Free access.

Visit sarsreference.com

Key Findings

We analyzed Sarsreference.com page load time and found that the first response time was 215 ms and then it took 681 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

sarsreference.com performance score

75

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

62/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

42/100

25%

SI (Speed Index)

Value4.7 s

68/100

10%

TBT (Total Blocking Time)

Value190 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.0 s

88/100

10%

Network Requests Diagram

sarsreference.com

215 ms

ga.js

3 ms

sarsref.gif

175 ms

sep2.gif

227 ms

sep3.gif

177 ms

Our browser made a total of 11 requests to load all elements on the main page. We found that 82% of them (9 requests) were addressed to the original Sarsreference.com, 18% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (374 ms) belongs to the original domain Sarsreference.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 8.9 kB (26%)

Content Size

34.0 kB

After Optimization

25.1 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Sarsreference.com main page is 34.0 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. Only 10% of websites need less resources to load. Javascripts take 17.2 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 8.1 kB

  • Original 10.9 kB
  • After minification 10.6 kB
  • After compression 2.8 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 8.1 kB or 74% of the original size.

Image Optimization

-13%

Potential reduce by 803 B

  • Original 6.0 kB
  • After minification 5.2 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. Obviously, Sarsreference needs image optimization as it can save up to 803 B or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 34 B

  • Original 17.2 kB
  • After minification 17.2 kB
  • After compression 17.1 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. This website has mostly compressed JavaScripts.

Requests Breakdown

We found no issues to fix!

Requests Now

10

After Optimization

10

  • AJAX
  • Images
  • JavaScript

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sarsreference. According to our analytics all requests are already optimized.

Network Requests Diagram

sarsreference.com

sarsreference.com

215 ms

ga.js

ga.js

3 ms

sarsref.gif

sarsref.gif

175 ms

sep2.gif

sep2.gif

227 ms

sep3.gif

sep3.gif

177 ms

trans.gif

trans.gif

274 ms

logo.jpg

logo.jpg

324 ms

a4w.gif

a4w.gif

374 ms

logo.gif

logo.gif

266 ms

bc.php

bc.php

353 ms

__utm.gif

__utm.gif

11 ms

Accessibility Review

sarsreference.com accessibility score

97

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

Best Practices

sarsreference.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

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

sarsreference.com SEO score

100

Search Engine Optimization Advices

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

    ID

  • Language Claimed

    EN

  • Encoding

    ISO-8859-15

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sarsreference.com can be misinterpreted by Google and other search engines. Our service has detected that is used on the page, and it does not match the claimed English language. Our system also found out that Sarsreference.com main page’s claimed encoding is iso-8859-15. 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

sarsreference.com

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