Tools & Wizards About Us

Report Summary

  • 69

    Performance

    Renders faster than
    80% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

human-factors.arc.nasa.gov

Human Systems Integration Division @ NASA Ames - Home

Page Load Speed

2.9 sec in total

First Response

536 ms

Resources Loaded

2.3 sec

Page Rendered

111 ms

About Website

Click here to check amazing Human Factors Arc NASA content for United States. Otherwise, check out these important facts you probably never knew about human-factors.arc.nasa.gov

The Human Systems Integration Division at NASA Ames Research Center, advances human-centered design and aerospace systems to make dramatic improvements in safety, efficiency and mission success.

Visit human-factors.arc.nasa.gov

Key Findings

We analyzed Human-factors.arc.nasa.gov page load time and found that the first response time was 536 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

human-factors.arc.nasa.gov performance score

69

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

63/100

10%

LCP (Largest Contentful Paint)

Value7.3 s

5/100

25%

SI (Speed Index)

Value3.0 s

94/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.5 s

82/100

10%

Network Requests Diagram

human-factors.arc.nasa.gov

536 ms

human-factors.arc.nasa.gov

394 ms

styles.css

154 ms

styles2.css

213 ms

core.css

214 ms

Our browser made a total of 81 requests to load all elements on the main page. We found that 99% of them (80 requests) were addressed to the original Human-factors.arc.nasa.gov, 1% (1 request) were made to Dap.digitalgov.gov. The less responsive or slowest element that took the longest time to load (760 ms) belongs to the original domain Human-factors.arc.nasa.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 43.6 kB (4%)

Content Size

1.1 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Human-factors.arc.nasa.gov main page is 1.1 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. 25% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 33.7 kB

  • Original 40.0 kB
  • After minification 35.5 kB
  • After compression 6.3 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 4.6 kB, which is 11% 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 33.7 kB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 246 B

  • Original 1.1 MB
  • After minification 1.1 MB

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. Human Factors Arc NASA images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 15 B

  • Original 8.2 kB
  • After minification 8.2 kB
  • After compression 8.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-79%

Potential reduce by 9.6 kB

  • Original 12.2 kB
  • After minification 9.3 kB
  • After compression 2.6 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. Human-factors.arc.nasa.gov needs all CSS files to be minified and compressed as it can save up to 9.6 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (13%)

Requests Now

79

After Optimization

69

  • Images
  • JavaScript
  • CSS

The browser has sent 79 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Human Factors Arc NASA. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

human-factors.arc.nasa.gov 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.

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

human-factors.arc.nasa.gov best practices score

75

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

High

Page has valid source maps

SEO Factors

human-factors.arc.nasa.gov SEO score

77

Search Engine Optimization Advices

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 Human-factors.arc.nasa.gov 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 Human-factors.arc.nasa.gov 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 Human Factors Arc NASA. 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: