Tools & Wizards About Us
sciencereview.silentspring.org screenshot

Report Summary

  • 68

    Performance

    Renders faster than
    81% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 95% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 88

    SEO

    Google-friendlier than
    66% of websites

sciencereview.silentspring.org

Environment and Breast Cancer: Science Review | Silent Spring Institute

Page Load Speed

361 ms in total

First Response

87 ms

Resources Loaded

173 ms

Page Rendered

101 ms

sciencereview.silentspring.org screenshot

About Website

Click here to check amazing Science Review Silent Spring content for United States. Otherwise, check out these important facts you probably never knew about sciencereview.silentspring.org

We are creating new knowledge about cancer-causing chemicals--how we are exposed and how they affect our health.

Visit sciencereview.silentspring.org

Key Findings

We analyzed Sciencereview.silentspring.org page load time and found that the first response time was 87 ms and then it took 274 ms to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

sciencereview.silentspring.org performance score

68

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value3.3 s

69/100

25%

SI (Speed Index)

Value4.2 s

77/100

10%

TBT (Total Blocking Time)

Value680 ms

43/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.0 s

88/100

10%

Network Requests Diagram

sciencereview.silentspring.org

87 ms

styles.css

19 ms

rollers.js

25 ms

urchin.js

4 ms

__utm.gif

4 ms

Our browser made a total of 16 requests to load all elements on the main page. We found that 88% of them (14 requests) were addressed to the original Sciencereview.silentspring.org, 13% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (87 ms) belongs to the original domain Sciencereview.silentspring.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 13.9 kB (21%)

Content Size

65.3 kB

After Optimization

51.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sciencereview.silentspring.org main page is 65.3 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. Only 5% of websites need less resources to load. Images take 40.9 kB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 5.1 kB

  • Original 7.7 kB
  • After minification 7.7 kB
  • After compression 2.6 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 5.1 kB or 66% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 40.9 kB
  • After minification 40.9 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. Science Review Silent Spring images are well optimized though.

JavaScript Optimization

-27%

Potential reduce by 2.5 kB

  • Original 9.1 kB
  • After minification 8.6 kB
  • After compression 6.6 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 2.5 kB or 27% of the original size.

CSS Optimization

-83%

Potential reduce by 6.3 kB

  • Original 7.6 kB
  • After minification 6.4 kB
  • After compression 1.3 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. Sciencereview.silentspring.org needs all CSS files to be minified and compressed as it can save up to 6.3 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (47%)

Requests Now

15

After Optimization

8

  • Images
  • JavaScript
  • CSS

The browser has sent 15 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Science Review Silent Spring. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

sciencereview.silentspring.org

sciencereview.silentspring.org

87 ms

styles.css

styles.css

19 ms

rollers.js

rollers.js

25 ms

urchin.js

urchin.js

4 ms

__utm.gif

__utm.gif

4 ms

header_1.jpg

header_1.jpg

16 ms

menu_0_f2.gif

menu_0_f2.gif

14 ms

menu_1.gif

menu_1.gif

12 ms

menu_2.gif

menu_2.gif

20 ms

menu_3.gif

menu_3.gif

33 ms

smokestack.jpg

smokestack.jpg

25 ms

rule.gif

rule.gif

33 ms

title_home_animals.gif

title_home_animals.gif

25 ms

title_home_humans.gif

title_home_humans.gif

23 ms

button_mammary.gif

button_mammary.gif

29 ms

button_epidimiology.gif

button_epidimiology.gif

35 ms

Accessibility Review

sciencereview.silentspring.org accessibility score

98

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

sciencereview.silentspring.org best practices score

75

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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

sciencereview.silentspring.org SEO score

88

Search Engine Optimization Advices

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

High

Tap targets are not sized appropriately

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 Sciencereview.silentspring.org 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 Sciencereview.silentspring.org 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

sciencereview.silentspring.org

Open Graph description is not detected on the main page of Science Review Silent Spring. 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: