Report Summary

  • 67


    Renders faster than
    80% of other websites

  • 91


    Visual factors better than
    that of 78% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 100


    Google-friendlier than
    95% of websites

Thomas Sumner – Science Writer, Communicator and Journalist

Page Load Speed

1.8 sec in total

First Response

65 ms

Resources Loaded

1.2 sec

Page Rendered

491 ms screenshot

About Website

Click here to check amazing Sci content. Otherwise, check out these important facts you probably never knew about

Thomas Sumner is a science writer, communicator and journalist in New York City. His interests straddle the intersection of science and technology.


Key Findings

We analyzed page load time and found that the first response time was 65 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics performance score


Measured Metrics





FCP (First Contentful Paint)

Value3.0 s



LCP (Largest Contentful Paint)

Value7.1 s



SI (Speed Index)

Value3.1 s



TBT (Total Blocking Time)

Value160 ms



CLS (Cumulative Layout Shift)




TTI (Time to Interactive)

Value4.6 s



Network Requests Diagram

65 ms

402 ms


87 ms


87 ms


51 ms

Our browser made a total of 25 requests to load all elements on the main page. We found that 4% of them (1 request) were addressed to the original, 36% (9 requests) were made to and 24% (6 requests) were made to The less responsive or slowest element that took the longest time to load (460 ms) relates to the external source

Page Optimization Overview & Recommendations

Page size can be reduced by 166.1 kB (18%)

Content Size

906.7 kB

After Optimization

740.6 kB

In fact, the total size of main page is 906.7 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. 60% of websites need less resources to load. Images take 596.1 kB which makes up the majority of the site volume.

HTML Optimization


Potential reduce by 24.7 kB

  • Original 33.0 kB
  • After minification 32.9 kB
  • After compression 8.2 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 24.7 kB or 75% of the original size.

Image Optimization


Potential reduce by 638 B

  • Original 596.1 kB
  • After minification 595.5 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. Sci images are well optimized though.

JavaScript Optimization


Potential reduce by 58.9 kB

  • Original 135.1 kB
  • After minification 135.1 kB
  • After compression 76.2 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 58.9 kB or 44% of the original size.

CSS Optimization


Potential reduce by 81.8 kB

  • Original 142.5 kB
  • After minification 142.4 kB
  • After compression 60.7 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. needs all CSS files to be minified and compressed as it can save up to 81.8 kB or 57% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (72%)

Requests Now


After Optimization


The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sci. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Review accessibility score


Accessibility Issues

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.




Buttons do not have an accessible name

Best Practices best practices score


Areas of Improvement

Trust and Safety




Does not use HTTPS


Ensure CSP is effective against XSS attacks





Detected JavaScript libraries


Browser errors were logged to the console

SEO Factors SEO score


Search Engine Optimization Advices

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](




Document uses legible font sizes

Language and Encoding

  • Language Detected


  • Language Claimed


  • Encoding


Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 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 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 data is detected on the main page of Sci. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: