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renjin.org screenshot

Report Summary

  • 65

    Performance

    Renders faster than
    78% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 95

    SEO

    Google-friendlier than
    90% of websites

renjin.org

Renjin | Integrating R and Java | The JVM-based interpreter for the R language for statistical computing

Page Load Speed

1.5 sec in total

First Response

150 ms

Resources Loaded

1.1 sec

Page Rendered

275 ms

renjin.org screenshot

About Website

Visit renjin.org now to see the best up-to-date Renjin content and also check out these interesting facts you probably never knew about renjin.org

Integrate R to Java and enhance your data analysis and statistical computing with R code and packages using Renjin, the JVM-based interpreter for the R language.

Visit renjin.org

Key Findings

We analyzed Renjin.org page load time and found that the first response time was 150 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

renjin.org performance score

65

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value6.5 s

9/100

25%

SI (Speed Index)

Value2.0 s

99/100

10%

TBT (Total Blocking Time)

Value360 ms

72/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.2 s

62/100

10%

Network Requests Diagram

renjin.org

150 ms

style.css

141 ms

embed_shepherd-v1.js

45 ms

highlight.pack.js

218 ms

opsfactor.png

718 ms

Our browser made a total of 12 requests to load all elements on the main page. We found that 67% of them (8 requests) were addressed to the original Renjin.org, 17% (2 requests) were made to Google-analytics.com and 8% (1 request) were made to Fast.wistia.net. The less responsive or slowest element that took the longest time to load (718 ms) belongs to the original domain Renjin.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 66.2 kB (5%)

Content Size

1.2 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Renjin.org main page is 1.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Images take 981.6 kB which makes up the majority of the site volume.

HTML Optimization

-67%

Potential reduce by 5.8 kB

  • Original 8.6 kB
  • After minification 7.7 kB
  • After compression 2.9 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 970 B, which is 11% 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 5.8 kB or 67% of the original size.

Image Optimization

-3%

Potential reduce by 24.9 kB

  • Original 981.6 kB
  • After minification 956.7 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. Renjin images are well optimized though.

JavaScript Optimization

-15%

Potential reduce by 34.1 kB

  • Original 225.6 kB
  • After minification 225.6 kB
  • After compression 191.5 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 34.1 kB or 15% of the original size.

CSS Optimization

-25%

Potential reduce by 1.5 kB

  • Original 5.9 kB
  • After minification 5.9 kB
  • After compression 4.4 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. Renjin.org needs all CSS files to be minified and compressed as it can save up to 1.5 kB or 25% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (33%)

Requests Now

9

After Optimization

6

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Renjin. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

renjin.org

renjin.org

150 ms

style.css

style.css

141 ms

embed_shepherd-v1.js

embed_shepherd-v1.js

45 ms

highlight.pack.js

highlight.pack.js

218 ms

opsfactor.png

opsfactor.png

718 ms

iccube.png

iccube.png

508 ms

analytics.js

analytics.js

16 ms

hero.jpg

hero.jpg

103 ms

collect

collect

16 ms

signika-regular-webfont.woff

signika-regular-webfont.woff

236 ms

signika-light-webfont.woff

signika-light-webfont.woff

254 ms

js

js

68 ms

Accessibility Review

renjin.org accessibility score

95

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.

Best Practices

renjin.org best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Page has valid source maps

SEO Factors

renjin.org SEO score

95

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

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 Renjin.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 Renjin.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

renjin.org

Open Graph data is detected on the main page of Renjin. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: