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reactome.org screenshot

Report Summary

  • 54

    Performance

    Renders faster than
    71% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

reactome.org

Home - Reactome Pathway Database

Page Load Speed

1.4 sec in total

First Response

341 ms

Resources Loaded

919 ms

Page Rendered

141 ms

reactome.org screenshot

About Website

Click here to check amazing Reactome content for Germany. Otherwise, check out these important facts you probably never knew about reactome.org

Reactome is pathway database which provides intuitive bioinformatics tools for the visualisation, interpretation and analysis of pathway knowledge.

Visit reactome.org

Key Findings

We analyzed Reactome.org page load time and found that the first response time was 341 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

reactome.org performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

11/100

10%

LCP (Largest Contentful Paint)

Value5.9 s

14/100

25%

SI (Speed Index)

Value4.9 s

65/100

10%

TBT (Total Blocking Time)

Value300 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value8.0 s

43/100

10%

Network Requests Diagram

www.reactome.org

341 ms

960_24_col.css

57 ms

reset.css

61 ms

text.css

60 ms

style.css

89 ms

Our browser made a total of 29 requests to load all elements on the main page. We found that 79% of them (23 requests) were addressed to the original Reactome.org, 7% (2 requests) were made to Platform.twitter.com and 7% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (341 ms) belongs to the original domain Reactome.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 99.2 kB (30%)

Content Size

331.9 kB

After Optimization

232.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Reactome.org main page is 331.9 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. Images take 226.4 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 27.0 kB

  • Original 31.6 kB
  • After minification 29.2 kB
  • After compression 4.5 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 27.0 kB or 86% of the original size.

Image Optimization

-13%

Potential reduce by 29.9 kB

  • Original 226.4 kB
  • After minification 196.5 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, Reactome needs image optimization as it can save up to 29.9 kB 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

-22%

Potential reduce by 6.9 kB

  • Original 31.3 kB
  • After minification 30.7 kB
  • After compression 24.4 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 6.9 kB or 22% of the original size.

CSS Optimization

-83%

Potential reduce by 35.4 kB

  • Original 42.7 kB
  • After minification 30.0 kB
  • After compression 7.3 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. Reactome.org needs all CSS files to be minified and compressed as it can save up to 35.4 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (52%)

Requests Now

27

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Reactome. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.reactome.org

www.reactome.org

341 ms

960_24_col.css

960_24_col.css

57 ms

reset.css

reset.css

61 ms

text.css

text.css

60 ms

style.css

style.css

89 ms

buttons.css

buttons.css

64 ms

main.css

main.css

76 ms

ebi-fluid.css

ebi-fluid.css

85 ms

autocomplete.css

autocomplete.css

88 ms

jquery.min.js

jquery.min.js

56 ms

plugin.css

plugin.css

86 ms

tablesorter.css

tablesorter.css

113 ms

jquery.autocomplete.min.js

jquery.autocomplete.min.js

82 ms

reactome.search.footer.js

reactome.search.footer.js

82 ms

widgets.js

widgets.js

83 ms

analytics.js

analytics.js

61 ms

ReactomeLogo.png

ReactomeLogo.png

46 ms

OICR2logo.png

OICR2logo.png

125 ms

NYUmc.png

NYUmc.png

43 ms

cshl_logo.png

cshl_logo.png

83 ms

EMBL_EBI_Logo_black.png

EMBL_EBI_Logo_black.png

43 ms

facebook.png

facebook.png

45 ms

twitter.png

twitter.png

60 ms

youtube.png

youtube.png

60 ms

Banner.png

Banner.png

181 ms

icons.png

icons.png

89 ms

collect

collect

80 ms

timeline.1b43d11859b7663a2225b885f87704a5.js

timeline.1b43d11859b7663a2225b885f87704a5.js

146 ms

collect

collect

58 ms

Accessibility Review

reactome.org accessibility score

85

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

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

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

reactome.org 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

SEO Factors

reactome.org SEO score

83

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

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Reactome.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Reactome.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

reactome.org

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