Report Summary

  • 92

    Performance

    Renders faster than
    92% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

cssf.usc.edu

Home > Department of Physics & Astronomy > USC Dana and David Dornsife College of Letters, Arts and Sciences

Page Load Speed

1.6 sec in total

First Response

602 ms

Resources Loaded

827 ms

Page Rendered

157 ms

cssf.usc.edu screenshot

About Website

Visit cssf.usc.edu now to see the best up-to-date Cssf USC content for United States and also check out these interesting facts you probably never knew about cssf.usc.edu

The University of Southern California's Department of Physics and Astronomy is an innovative research and teaching department.

Visit cssf.usc.edu

Key Findings

We analyzed Cssf.usc.edu page load time and found that the first response time was 602 ms and then it took 984 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

cssf.usc.edu performance score

92

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.7 s

93/100

10%

LCP (Largest Contentful Paint)

Value2.0 s

97/100

25%

SI (Speed Index)

Value1.8 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.231

54/100

15%

TTI (Time to Interactive)

Value1.7 s

100/100

10%

Network Requests Diagram

cssf.usc.edu

602 ms

CSSF.css

141 ms

countdown.js

143 ms

CSSF_Logo.gif

145 ms

Overview2008.jpg

140 ms

Our browser made a total of 10 requests to load all elements on the main page. We found that all of those requests were addressed to Cssf.usc.edu and no external sources were called. The less responsive or slowest element that took the longest time to load (602 ms) belongs to the original domain Cssf.usc.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 22.9 kB (26%)

Content Size

87.3 kB

After Optimization

64.4 kB

In fact, the total size of Cssf.usc.edu main page is 87.3 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 61.2 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 19.8 kB

  • Original 23.3 kB
  • After minification 9.7 kB
  • After compression 3.5 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 13.6 kB, which is 58% 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 19.8 kB or 85% of the original size.

Image Optimization

-2%

Potential reduce by 1.1 kB

  • Original 61.2 kB
  • After minification 60.1 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. Cssf USC images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 1.3 kB

  • Original 1.9 kB
  • After minification 1.2 kB
  • After compression 564 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 1.3 kB or 70% of the original size.

CSS Optimization

-71%

Potential reduce by 626 B

  • Original 883 B
  • After minification 758 B
  • After compression 257 B

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. Cssf.usc.edu needs all CSS files to be minified and compressed as it can save up to 626 B or 71% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

9

After Optimization

9

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cssf USC. According to our analytics all requests are already optimized.

Accessibility Review

cssf.usc.edu accessibility score

100

Accessibility Issues

Best Practices

cssf.usc.edu best practices score

67

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

cssf.usc.edu SEO score

75

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cssf.usc.edu 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 Cssf.usc.edu main page’s claimed encoding is . 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 Cssf USC. 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: