Report Summary

  • 49

    Performance

    Renders faster than
    68% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

matsci.caltech.edu

Materials Science

Page Load Speed

788 ms in total

First Response

344 ms

Resources Loaded

347 ms

Page Rendered

97 ms

matsci.caltech.edu screenshot

About Website

Click here to check amazing Matsci Caltech content for United States. Otherwise, check out these important facts you probably never knew about matsci.caltech.edu

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Key Findings

We analyzed Matsci.caltech.edu page load time and found that the first response time was 344 ms and then it took 444 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

matsci.caltech.edu performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

23/100

10%

LCP (Largest Contentful Paint)

Value7.4 s

4/100

25%

SI (Speed Index)

Value5.6 s

52/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.306

38/100

15%

TTI (Time to Interactive)

Value7.1 s

52/100

10%

Network Requests Diagram

matsci.caltech.edu

344 ms

Our browser made a total of 1 request to load all elements on the main page. We found that all of those requests were addressed to Matsci.caltech.edu and no external sources were called. The less responsive or slowest element that took the longest time to load (344 ms) belongs to the original domain Matsci.caltech.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 28 B (18%)

Content Size

160 B

After Optimization

132 B

In fact, the total size of Matsci.caltech.edu main page is 160 B. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. HTML takes 160 B which makes up the majority of the site volume.

HTML Optimization

-18%

Potential reduce by 28 B

  • Original 160 B
  • After minification 156 B
  • After compression 132 B

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 28 B or 18% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

0

After Optimization

0

Besides the initial HTML request, no CSS, Javascripts, AJAX or image files were requested in the course of web page rendering.

Accessibility Review

matsci.caltech.edu accessibility score

91

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

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>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

matsci.caltech.edu 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

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

matsci.caltech.edu SEO score

69

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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 Matsci.caltech.edu 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 Matsci.caltech.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 Matsci Caltech. 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: