Report Summary

  • 86

    Performance

    Renders faster than
    89% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 46

    SEO

    Google-friendlier than
    18% of websites

Page Load Speed

1.5 sec in total

First Response

306 ms

Resources Loaded

1.1 sec

Page Rendered

131 ms

corenlp.run screenshot

About Website

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Key Findings

We analyzed Corenlp.run page load time and found that the first response time was 306 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

corenlp.run performance score

86

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

55/100

10%

LCP (Largest Contentful Paint)

Value3.4 s

65/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.0 s

96/100

10%

Network Requests Diagram

corenlp.run

306 ms

jquery-2.1.4.min.js

112 ms

bootstrap.min.css

104 ms

bootstrap-theme.min.css

102 ms

bootstrap.min.js

104 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 13% of them (3 requests) were addressed to the original Corenlp.run, 50% (12 requests) were made to Nlp.stanford.edu and 13% (3 requests) were made to Maxcdn.bootstrapcdn.com. The less responsive or slowest element that took the longest time to load (568 ms) relates to the external source Nlp.stanford.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 381.4 kB (79%)

Content Size

483.2 kB

After Optimization

101.8 kB

In fact, the total size of Corenlp.run main page is 483.2 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. 20% of websites need less resources to load. Javascripts take 319.0 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 5.7 kB

  • Original 7.6 kB
  • After minification 6.5 kB
  • After compression 1.9 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 1.1 kB, which is 14% 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 5.7 kB or 75% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 538 B
  • After minification 538 B

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. Corenlp images are well optimized though.

JavaScript Optimization

-77%

Potential reduce by 244.9 kB

  • Original 319.0 kB
  • After minification 244.4 kB
  • After compression 74.1 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 244.9 kB or 77% of the original size.

CSS Optimization

-84%

Potential reduce by 130.8 kB

  • Original 156.1 kB
  • After minification 151.0 kB
  • After compression 25.2 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. Corenlp.run needs all CSS files to be minified and compressed as it can save up to 130.8 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (70%)

Requests Now

23

After Optimization

7

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Corenlp. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

corenlp.run accessibility score

68

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.

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

Document doesn't have a <title> element

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Best Practices

corenlp.run best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

corenlp.run SEO score

46

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

Document doesn't have a <title> element

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

robots.txt is not valid

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 Corenlp.run 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 Corenlp.run 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 description is not detected on the main page of Corenlp. 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: