Tools & Wizards About Us

Report Summary

  • 67

    Performance

    Renders faster than
    79% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

optaplanner.org

OptaPlanner - The fast, Open Source and easy-to-use solver

Page Load Speed

640 ms in total

First Response

40 ms

Resources Loaded

345 ms

Page Rendered

255 ms

About Website

Visit optaplanner.org now to see the best up-to-date Opta Planner content for United States and also check out these interesting facts you probably never knew about optaplanner.org

Solve any constraint optimization problem easily, including the Vehicle Routing Problem, Employee Rostering, Maintenance Scheduling and many others.

Visit optaplanner.org

Key Findings

We analyzed Optaplanner.org page load time and found that the first response time was 40 ms and then it took 600 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

optaplanner.org performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value4.6 s

34/100

25%

SI (Speed Index)

Value3.1 s

93/100

10%

TBT (Total Blocking Time)

Value290 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.5 s

59/100

10%

Network Requests Diagram

optaplanner.org

40 ms

www.optaplanner.org

36 ms

dtm.js

69 ms

js

85 ms

bootstrap.min.css

40 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 39% of them (12 requests) were addressed to the original Optaplanner.org, 29% (9 requests) were made to Cdn.jsdelivr.net and 13% (4 requests) were made to Gravatar.com. The less responsive or slowest element that took the longest time to load (116 ms) belongs to the original domain Optaplanner.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 774.0 kB (78%)

Content Size

995.0 kB

After Optimization

221.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Optaplanner.org main page is 995.0 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. 20% of websites need less resources to load. Javascripts take 885.4 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 27.4 kB

  • Original 34.5 kB
  • After minification 27.0 kB
  • After compression 7.1 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 7.5 kB, which is 22% 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 27.4 kB or 79% of the original size.

Image Optimization

-7%

Potential reduce by 4.7 kB

  • Original 71.4 kB
  • After minification 66.7 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. Opta Planner images are well optimized though.

JavaScript Optimization

-83%

Potential reduce by 738.9 kB

  • Original 885.4 kB
  • After minification 885.4 kB
  • After compression 146.5 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 738.9 kB or 83% of the original size.

CSS Optimization

-82%

Potential reduce by 3.1 kB

  • Original 3.7 kB
  • After minification 1.6 kB
  • After compression 690 B

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. Optaplanner.org needs all CSS files to be minified and compressed as it can save up to 3.1 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (45%)

Requests Now

29

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Opta Planner. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

optaplanner.org accessibility score

83

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

Image elements do not have [alt] attributes

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

optaplanner.org best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

optaplanner.org SEO score

79

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

High

Image elements do not have [alt] attributes

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

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 Optaplanner.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 Optaplanner.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

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