603 ms in total
159 ms
301 ms
143 ms
Visit dev.physicslab.org now to see the best up-to-date Dev PhysicsLAB content for United States and also check out these interesting facts you probably never knew about dev.physicslab.org
PhysicsLAB, an online high school physics program, was started in 1997. Online content can be accessed through a comprehensive table of contents, search engine, and in curriculum groups.
Visit dev.physicslab.orgWe analyzed Dev.physicslab.org page load time and found that the first response time was 159 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. This domain responded with an error, which can significantly jeopardize Dev.physicslab.org rating and web reputation
dev.physicslab.org performance score
name
value
score
weighting
Value2.2 s
77/100
10%
Value2.9 s
80/100
25%
Value2.5 s
98/100
10%
Value1,350 ms
17/100
30%
Value0.068
96/100
15%
Value6.4 s
59/100
10%
159 ms
60 ms
57 ms
62 ms
63 ms
Our browser made a total of 25 requests to load all elements on the main page. We found that 92% of them (23 requests) were addressed to the original Dev.physicslab.org, 8% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (159 ms) belongs to the original domain Dev.physicslab.org.
Page size can be reduced by 22.6 kB (29%)
77.6 kB
55.0 kB
In fact, the total size of Dev.physicslab.org main page is 77.6 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. 15% of websites need less resources to load. Images take 35.3 kB which makes up the majority of the site volume.
Potential reduce by 10.1 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 2.5 kB, which is 17% 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 10.1 kB or 70% of the original size.
Potential reduce by 3.3 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. Dev PhysicsLAB images are well optimized though.
Potential reduce by 34 B
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.
Potential reduce by 9.2 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. Dev.physicslab.org needs all CSS files to be minified and compressed as it can save up to 9.2 kB or 86% of the original size.
We found no issues to fix!
21
21
The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dev PhysicsLAB. According to our analytics all requests are already optimized.
dev.physicslab.org
159 ms
PhysicsLab.css
60 ms
Home.gif
57 ms
Directions.jpg
62 ms
SearchEngine.jpg
63 ms
TableContents.jpg
67 ms
VertSpace.jpg
67 ms
Review.jpg
113 ms
Lessons.jpg
83 ms
Worksheets.jpg
112 ms
Labs.jpg
112 ms
Compilations.jpg
111 ms
AAPT.jpg
111 ms
Amusing.jpg
111 ms
APEssays.jpg
114 ms
APEquations.jpg
113 ms
CPWorkbooks.jpg
115 ms
MCAS.jpg
124 ms
NextTime.jpg
126 ms
NYRegents.jpg
137 ms
Physlets.jpg
150 ms
PracticeProblems.jpg
146 ms
PLyear7.gif
149 ms
ga.js
30 ms
__utm.gif
12 ms
dev.physicslab.org accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Links do not have a discernible name
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
dev.physicslab.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Browser errors were logged to the console
dev.physicslab.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dev.physicslab.org 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 Dev.physicslab.org 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.
dev.physicslab.org
Open Graph description is not detected on the main page of Dev PhysicsLAB. 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: