Tools & Wizards About Us
physics.northwestern.edu screenshot

Report Summary

  • 33

    Performance

    Renders faster than
    53% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 89% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

physics.northwestern.edu

Department of Physics and Astronomy - Northwestern University

Page Load Speed

4.7 sec in total

First Response

321 ms

Resources Loaded

3.8 sec

Page Rendered

653 ms

physics.northwestern.edu screenshot

About Website

Visit physics.northwestern.edu now to see the best up-to-date Physics Northwestern content for United States and also check out these interesting facts you probably never knew about physics.northwestern.edu

Visit physics.northwestern.edu

Key Findings

We analyzed Physics.northwestern.edu page load time and found that the first response time was 321 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

physics.northwestern.edu performance score

33

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value5.2 s

23/100

25%

SI (Speed Index)

Value4.8 s

67/100

10%

TBT (Total Blocking Time)

Value3,550 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value21.6 s

1/100

10%

Network Requests Diagram

physics.northwestern.edu

321 ms

www.physics.northwestern.edu

220 ms

weinberg-dept-2016.css

330 ms

department.css

102 ms

responsiveslides.css

149 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that 32% of them (12 requests) were addressed to the original Physics.northwestern.edu, 34% (13 requests) were made to Weinberg.northwestern.edu and 18% (7 requests) were made to Common.northwestern.edu. The less responsive or slowest element that took the longest time to load (2.7 sec) relates to the external source Fast.fonts.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 256.3 kB (52%)

Content Size

491.7 kB

After Optimization

235.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Physics.northwestern.edu main page is 491.7 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. 20% of websites need less resources to load. Javascripts take 209.9 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 25.9 kB

  • Original 33.0 kB
  • After minification 27.7 kB
  • After compression 7.1 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 5.3 kB, which is 16% 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 25.9 kB or 79% of the original size.

Image Optimization

-13%

Potential reduce by 21.8 kB

  • Original 168.3 kB
  • After minification 146.5 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, Physics Northwestern needs image optimization as it can save up to 21.8 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-68%

Potential reduce by 141.9 kB

  • Original 209.9 kB
  • After minification 190.3 kB
  • After compression 68.0 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 141.9 kB or 68% of the original size.

CSS Optimization

-83%

Potential reduce by 66.7 kB

  • Original 80.4 kB
  • After minification 52.3 kB
  • After compression 13.8 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. Physics.northwestern.edu needs all CSS files to be minified and compressed as it can save up to 66.7 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (25%)

Requests Now

32

After Optimization

24

  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Physics Northwestern. 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 JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

physics.northwestern.edu

physics.northwestern.edu

321 ms

www.physics.northwestern.edu

www.physics.northwestern.edu

220 ms

weinberg-dept-2016.css

weinberg-dept-2016.css

330 ms

department.css

department.css

102 ms

responsiveslides.css

responsiveslides.css

149 ms

jquery.min.js

jquery.min.js

145 ms

scripts.js

scripts.js

511 ms

responsiveslides.js

responsiveslides.js

976 ms

f2e58edf-488b-4e69-ae6e-5ad7419fe85c.css

f2e58edf-488b-4e69-ae6e-5ad7419fe85c.css

108 ms

octicons.css

octicons.css

50 ms

Yang%202.jpg

Yang%202.jpg

544 ms

northwestern-university.svg

northwestern-university.svg

583 ms

pin-drop.svg

pin-drop.svg

588 ms

mobile-phone.svg

mobile-phone.svg

589 ms

email.svg

email.svg

694 ms

social-media-icons.png

social-media-icons.png

692 ms

physics-homepage-carousel-barium-624x353.jpg

physics-homepage-carousel-barium-624x353.jpg

490 ms

physics-homepage-carousel-larson-624x353.jpg

physics-homepage-carousel-larson-624x353.jpg

542 ms

dahl-dark-matter-624x353.jpg

dahl-dark-matter-624x353.jpg

511 ms

blue-pattern-bg.png

blue-pattern-bg.png

185 ms

physics-homepage-column-poster-280x170.jpg

physics-homepage-column-poster-280x170.jpg

487 ms

bullet.png

bullet.png

353 ms

large-hadron-collider-280x170.jpg

large-hadron-collider-280x170.jpg

633 ms

northwestern.png

northwestern.png

580 ms

m-search2.png

m-search2.png

481 ms

m-nav-icon.png

m-nav-icon.png

847 ms

calendar-icon.png

calendar-icon.png

1238 ms

nu-we-will-weinberg-200x70.png

nu-we-will-weinberg-200x70.png

1256 ms

AkkuratProBold.woff

AkkuratProBold.woff

1780 ms

AkkuratProRegular.woff

AkkuratProRegular.woff

1738 ms

40780796-f5dd-4ccf-89d6-5e9feed1b4c3.woff

40780796-f5dd-4ccf-89d6-5e9feed1b4c3.woff

2671 ms

46e5db04-2200-416c-8772-e8e92ac66d85.woff

46e5db04-2200-416c-8772-e8e92ac66d85.woff

953 ms

analytics.js

analytics.js

119 ms

left-arrow-off.png

left-arrow-off.png

423 ms

pause-off.png

pause-off.png

524 ms

right-arrow-off.png

right-arrow-off.png

606 ms

collect

collect

84 ms

weinberg-print.css

weinberg-print.css

54 ms

Accessibility Review

physics.northwestern.edu accessibility score

96

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.

Best Practices

physics.northwestern.edu best practices score

67

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

physics.northwestern.edu SEO score

75

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

Links do not have descriptive text

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

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 Physics.northwestern.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 Physics.northwestern.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

physics.northwestern.edu

Open Graph description is not detected on the main page of Physics Northwestern. 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: