Report Summary

  • 12

    Performance

    Renders faster than
    25% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 82% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

Page Load Speed

2.8 sec in total

First Response

697 ms

Resources Loaded

1.9 sec

Page Rendered

162 ms

chem.umd.edu screenshot

About Website

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Key Findings

We analyzed Chem.umd.edu page load time and found that the first response time was 697 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

chem.umd.edu performance score

12

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

7/100

10%

LCP (Largest Contentful Paint)

Value29.9 s

0/100

25%

SI (Speed Index)

Value19.7 s

0/100

10%

TBT (Total Blocking Time)

Value1,130 ms

23/100

30%

CLS (Cumulative Layout Shift)

Value0.371

29/100

15%

TTI (Time to Interactive)

Value20.6 s

2/100

10%

Network Requests Diagram

www.chem.umd.edu

697 ms

iconize.css

21 ms

style.css

29 ms

css

23 ms

www.chem.umd.edu

200 ms

Our browser made a total of 93 requests to load all elements on the main page. We found that 94% of them (87 requests) were addressed to the original Chem.umd.edu, 4% (4 requests) were made to Fonts.googleapis.com and 1% (1 request) were made to Maps.google.com. The less responsive or slowest element that took the longest time to load (697 ms) belongs to the original domain Chem.umd.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 809.8 kB (50%)

Content Size

1.6 MB

After Optimization

804.0 kB

In fact, the total size of Chem.umd.edu main page is 1.6 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. 60% of websites need less resources to load. Images take 662.4 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 64.6 kB

  • Original 81.2 kB
  • After minification 75.9 kB
  • After compression 16.6 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 64.6 kB or 80% of the original size.

Image Optimization

-8%

Potential reduce by 55.6 kB

  • Original 662.4 kB
  • After minification 606.8 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. Chem Umd images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 336.9 kB

  • Original 463.3 kB
  • After minification 380.8 kB
  • After compression 126.4 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 336.9 kB or 73% of the original size.

CSS Optimization

-87%

Potential reduce by 352.6 kB

  • Original 406.8 kB
  • After minification 339.1 kB
  • After compression 54.2 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. Chem.umd.edu needs all CSS files to be minified and compressed as it can save up to 352.6 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 47 (52%)

Requests Now

91

After Optimization

44

The browser has sent 91 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chem Umd. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 32 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

chem.umd.edu accessibility score

93

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

chem.umd.edu 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

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

chem.umd.edu 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

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 Chem.umd.edu 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 Chem.umd.edu 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 Chem Umd. 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: