Tools & Wizards About Us
alterlab.org screenshot

Report Summary

  • 85

    Performance

    Renders faster than
    89% of other websites

  • 50

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

alterlab.org

Orly Alter - Genomic Signal Processing Lab - Home Page

Page Load Speed

631 ms in total

First Response

126 ms

Resources Loaded

354 ms

Page Rendered

151 ms

alterlab.org screenshot

About Website

Click here to check amazing Alter Lab content. Otherwise, check out these important facts you probably never knew about alterlab.org

Orly Alter is a Utah Science, Technology, and Research associate professor of bioengineering and human genetics at the Scientific Computing and Imaging Institute [1] and the Huntsman Cancer Institute ...

Visit alterlab.org

Key Findings

We analyzed Alterlab.org page load time and found that the first response time was 126 ms and then it took 505 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

alterlab.org performance score

85

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.0 s

100/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

41/100

25%

SI (Speed Index)

Value1.3 s

100/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value1.4 s

100/100

10%

Network Requests Diagram

alterlab.org

126 ms

1.jpg

77 ms

2.jpg

69 ms

3.jpg

72 ms

4.jpg

76 ms

Our browser made a total of 18 requests to load all elements on the main page. We found that all of those requests were addressed to Alterlab.org and no external sources were called. The less responsive or slowest element that took the longest time to load (212 ms) belongs to the original domain Alterlab.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 4.1 kB (1%)

Content Size

595.4 kB

After Optimization

591.3 kB

  • HTML
  • Images

In fact, the total size of Alterlab.org main page is 595.4 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. 30% of websites need less resources to load. Images take 588.7 kB which makes up the majority of the site volume.

HTML Optimization

-59%

Potential reduce by 4.0 kB

  • Original 6.7 kB
  • After minification 6.7 kB
  • After compression 2.7 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 4.0 kB or 59% of the original size.

Image Optimization

-0%

Potential reduce by 106 B

  • Original 588.7 kB
  • After minification 588.6 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. Alter Lab images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

17

After Optimization

17

  • Images

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Alter Lab. According to our analytics all requests are already optimized.

Network Requests Diagram

alterlab.org

alterlab.org

126 ms

1.jpg

1.jpg

77 ms

2.jpg

2.jpg

69 ms

3.jpg

3.jpg

72 ms

4.jpg

4.jpg

76 ms

5.jpg

5.jpg

110 ms

6.jpg

6.jpg

75 ms

7.jpg

7.jpg

135 ms

8.jpg

8.jpg

101 ms

9.jpg

9.jpg

117 ms

10.jpg

10.jpg

109 ms

11.jpg

11.jpg

102 ms

12.jpg

12.jpg

149 ms

13.jpg

13.jpg

166 ms

14.jpg

14.jpg

208 ms

15.jpg

15.jpg

212 ms

16.jpg

16.jpg

142 ms

17.jpg

17.jpg

157 ms

Accessibility Review

alterlab.org accessibility score

50

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

Links do not have a discernible name

Best Practices

alterlab.org 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

alterlab.org SEO score

67

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Alterlab.org 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 Alterlab.org main page’s claimed encoding is . 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

alterlab.org

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