Tools & Wizards About Us

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

historyofscienceintheunitedstates-19thcentury.net

History of Science in the United States: Created and maintained by Clark A. Elliott

Page Load Speed

1.9 sec in total

First Response

730 ms

Resources Loaded

1.1 sec

Page Rendered

89 ms

About Website

Visit historyofscienceintheunitedstates-19thcentury.net now to see the best up-to-date History Of Science Inthe United States 19thcentury content and also check out these interesting facts you probably never knew about historyofscienceintheunitedstates-19thcentury.net

History of Science in the United States: Research Aids for the Nineteenth Century includes bibliographies of reference and other works, and historical information (namely, an indexed chronology of Ame...

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Key Findings

We analyzed Historyofscienceintheunitedstates-19thcentury.net page load time and found that the first response time was 730 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

historyofscienceintheunitedstates-19thcentury.net performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value1.5 s

100/100

25%

SI (Speed Index)

Value2.0 s

99/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.4 s

100/100

10%

Network Requests Diagram

historyofscienceintheunitedstates-19thcentury.net

730 ms

historyOfScienceStyles.css

64 ms

jquery-1.6.2.min.js

185 ms

jquery.corners.min.js

125 ms

clientSideScripts.js

126 ms

Our browser made a total of 11 requests to load all elements on the main page. We found that all of those requests were addressed to Historyofscienceintheunitedstates-19thcentury.net and no external sources were called. The less responsive or slowest element that took the longest time to load (730 ms) belongs to the original domain Historyofscienceintheunitedstates-19thcentury.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 30.4 kB (37%)

Content Size

81.9 kB

After Optimization

51.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Historyofscienceintheunitedstates-19thcentury.net main page is 81.9 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. Only 10% of websites need less resources to load. Javascripts take 60.0 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 6.3 kB

  • Original 8.4 kB
  • After minification 6.4 kB
  • After compression 2.0 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 1.9 kB, which is 23% 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 6.3 kB or 76% of the original size.

Image Optimization

-5%

Potential reduce by 628 B

  • Original 11.4 kB
  • After minification 10.8 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. History Of Science Inthe United States 19thcentury images are well optimized though.

JavaScript Optimization

-37%

Potential reduce by 22.4 kB

  • Original 60.0 kB
  • After minification 54.3 kB
  • After compression 37.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 22.4 kB or 37% of the original size.

CSS Optimization

-48%

Potential reduce by 1.0 kB

  • Original 2.1 kB
  • After minification 2.1 kB
  • After compression 1.1 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. Historyofscienceintheunitedstates-19thcentury.net needs all CSS files to be minified and compressed as it can save up to 1.0 kB or 48% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

10

After Optimization

10

  • Images
  • JavaScript
  • CSS

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of History Of Science Inthe United States 19thcentury. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

historyofscienceintheunitedstates-19thcentury.net accessibility score

65

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

historyofscienceintheunitedstates-19thcentury.net 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

SEO Factors

historyofscienceintheunitedstates-19thcentury.net SEO score

67

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    WINDOWS-1252

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Historyofscienceintheunitedstates-19thcentury.net 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 Historyofscienceintheunitedstates-19thcentury.net main page’s claimed encoding is windows-1252. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

Open Graph description is not detected on the main page of History Of Science Inthe United States 19thcentury. 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: