Tools & Wizards About Us

Report Summary

  • 86

    Performance

    Renders faster than
    89% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 61% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

virtuallaboratory.colorado.edu

virtual laboratories - socratic chatbot, the BCI, stimulators in biology

Page Load Speed

2.3 sec in total

First Response

285 ms

Resources Loaded

1.3 sec

Page Rendered

708 ms

About Website

Visit virtuallaboratory.colorado.edu now to see the best up-to-date Virtual Laboratory Colorado content for United States and also check out these interesting facts you probably never knew about virtuallaboratory.colorado.edu

BioFundamentals, CLUE - Chemistry, Life, the Universe and Everything, virtual Genetics, beSocratic formative assessment, FLASH-based virtual laboratories, Mendel, Morgan, Monod, Muller, E. Coli, Luria...

Visit virtuallaboratory.colorado.edu

Key Findings

We analyzed Virtuallaboratory.colorado.edu page load time and found that the first response time was 285 ms and then it took 2 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

virtuallaboratory.colorado.edu performance score

86

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

94/100

10%

LCP (Largest Contentful Paint)

Value2.7 s

85/100

25%

SI (Speed Index)

Value1.9 s

100/100

10%

TBT (Total Blocking Time)

Value390 ms

68/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.8 s

97/100

10%

Network Requests Diagram

virtuallaboratory.colorado.edu

285 ms

virtuallaboratory.colorado.edu

210 ms

AC_RunActiveContent.js

48 ms

ga.js

35 ms

virtual-logo.jpg

323 ms

Our browser made a total of 20 requests to load all elements on the main page. We found that 90% of them (18 requests) were addressed to the original Virtuallaboratory.colorado.edu, 10% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (714 ms) belongs to the original domain Virtuallaboratory.colorado.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 706.7 kB (81%)

Content Size

872.1 kB

After Optimization

165.4 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Virtuallaboratory.colorado.edu main page is 872.1 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. 25% of websites need less resources to load. Images take 835.6 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 8.3 kB

  • Original 11.3 kB
  • After minification 9.7 kB
  • After compression 3.0 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 1.6 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 8.3 kB or 74% of the original size.

Image Optimization

-83%

Potential reduce by 691.9 kB

  • Original 835.6 kB
  • After minification 143.7 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. Obviously, Virtual Laboratory Colorado needs image optimization as it can save up to 691.9 kB or 83% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-26%

Potential reduce by 6.5 kB

  • Original 25.2 kB
  • After minification 22.3 kB
  • After compression 18.7 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 6.5 kB or 26% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

18

After Optimization

18

  • Images
  • JavaScript

The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Virtual Laboratory Colorado. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

virtuallaboratory.colorado.edu accessibility score

86

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

virtuallaboratory.colorado.edu best practices score

83

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

SEO Factors

virtuallaboratory.colorado.edu SEO score

75

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Virtuallaboratory.colorado.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 Virtuallaboratory.colorado.edu main page’s claimed encoding is iso-8859-1. 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 Virtual Laboratory Colorado. 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: