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Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

datanucleus.org

DataNucleus

Page Load Speed

1.7 sec in total

First Response

214 ms

Resources Loaded

1.3 sec

Page Rendered

134 ms

datanucleus.org screenshot

About Website

Welcome to datanucleus.org homepage info - get ready to check Data Nucleus best content for India right away, or after learning these important things about datanucleus.org

DataNucleus JDO/JPA/REST Persistence of Java Objects

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Key Findings

We analyzed Datanucleus.org page load time and found that the first response time was 214 ms and then it took 1.4 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

datanucleus.org performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

58/100

25%

SI (Speed Index)

Value3.7 s

85/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.338

33/100

15%

TTI (Time to Interactive)

Value3.7 s

90/100

10%

Network Requests Diagram

datanucleus.org

214 ms

www.datanucleus.org

428 ms

bootstrap-cosmo.css

207 ms

bootstrap-toc.min.css

272 ms

frontpage.css

271 ms

Our browser made a total of 19 requests to load all elements on the main page. We found that 84% of them (16 requests) were addressed to the original Datanucleus.org, 5% (1 request) were made to Cdnjs.cloudflare.com and 5% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (428 ms) belongs to the original domain Datanucleus.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 36.0 kB (20%)

Content Size

176.2 kB

After Optimization

140.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Datanucleus.org main page is 176.2 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. 15% of websites need less resources to load. Images take 81.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 13.6 kB

  • Original 17.6 kB
  • After minification 14.3 kB
  • After compression 4.0 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 3.3 kB, which is 19% 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 13.6 kB or 77% of the original size.

Image Optimization

-23%

Potential reduce by 18.8 kB

  • Original 81.6 kB
  • After minification 62.8 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, Data Nucleus needs image optimization as it can save up to 18.8 kB or 23% 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 14 B

  • Original 44.7 kB
  • After minification 44.7 kB
  • After compression 44.7 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.

CSS Optimization

-11%

Potential reduce by 3.6 kB

  • Original 32.2 kB
  • After minification 32.2 kB
  • After compression 28.7 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. Datanucleus.org needs all CSS files to be minified and compressed as it can save up to 3.6 kB or 11% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (35%)

Requests Now

17

After Optimization

11

  • Images
  • JavaScript
  • CSS

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Data Nucleus. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

datanucleus.org

datanucleus.org

214 ms

www.datanucleus.org

www.datanucleus.org

428 ms

bootstrap-cosmo.css

bootstrap-cosmo.css

207 ms

bootstrap-toc.min.css

bootstrap-toc.min.css

272 ms

frontpage.css

frontpage.css

271 ms

foundation.css

foundation.css

286 ms

datanucleus_theme.css

datanucleus_theme.css

282 ms

font-awesome.min.css

font-awesome.min.css

26 ms

jquery.min.js

jquery.min.js

19 ms

bootstrap.min.js

bootstrap.min.js

306 ms

bootstrap-toc.min.js

bootstrap-toc.min.js

360 ms

css

css

31 ms

datanucleus_icon.png

datanucleus_icon.png

94 ms

datanucleus_overview.png

datanucleus_overview.png

270 ms

database.png

database.png

101 ms

api.png

api.png

104 ms

contribute.png

contribute.png

101 ms

documentation.png

documentation.png

183 ms

download.png

download.png

193 ms

Accessibility Review

datanucleus.org accessibility score

87

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.

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

datanucleus.org best practices score

75

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

datanucleus.org SEO score

92

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

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Datanucleus.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 Datanucleus.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

datanucleus.org

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