Tools & Wizards About Us
rssi.us screenshot

Report Summary

  • 90

    Performance

    Renders faster than
    91% of other websites

  • 57

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

rssi.us

Radiation Safety | Radon | RSSI

Page Load Speed

766 ms in total

First Response

69 ms

Resources Loaded

441 ms

Page Rendered

256 ms

rssi.us screenshot

About Website

Visit rssi.us now to see the best up-to-date RSSI content and also check out these interesting facts you probably never knew about rssi.us

RSSI, a radiation safety consulting firm, is dedicated to keeping workers and the public safe from the dangers of radiation.

Visit rssi.us

Key Findings

We analyzed Rssi.us page load time and found that the first response time was 69 ms and then it took 697 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

rssi.us performance score

90

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

94/100

10%

LCP (Largest Contentful Paint)

Value3.5 s

63/100

25%

SI (Speed Index)

Value2.1 s

99/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.017

100/100

15%

TTI (Time to Interactive)

Value1.6 s

100/100

10%

Network Requests Diagram

rssi.us

69 ms

bg.gif

33 ms

logo_top.jpg

35 ms

home_top.jpg

35 ms

consulting_top.jpg

36 ms

Our browser made a total of 40 requests to load all elements on the main page. We found that all of those requests were addressed to Rssi.us and no external sources were called. The less responsive or slowest element that took the longest time to load (237 ms) belongs to the original domain Rssi.us.

Page Optimization Overview & Recommendations

Page size can be reduced by 51.5 kB (8%)

Content Size

616.8 kB

After Optimization

565.3 kB

  • HTML
  • Images

In fact, the total size of Rssi.us main page is 616.8 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 603.3 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 10.2 kB

  • Original 13.4 kB
  • After minification 12.0 kB
  • After compression 3.3 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 1.5 kB, which is 11% 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 10.2 kB or 76% of the original size.

Image Optimization

-7%

Potential reduce by 41.3 kB

  • Original 603.3 kB
  • After minification 562.0 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. RSSI images are well optimized though.

Requests Breakdown

Number of requests can be reduced by 11 (28%)

Requests Now

39

After Optimization

28

  • Images

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of RSSI. 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

rssi.us

rssi.us

69 ms

bg.gif

bg.gif

33 ms

logo_top.jpg

logo_top.jpg

35 ms

home_top.jpg

home_top.jpg

35 ms

consulting_top.jpg

consulting_top.jpg

36 ms

laboratory_top.jpg

laboratory_top.jpg

46 ms

calibration_top.jpg

calibration_top.jpg

60 ms

radon_top.jpg

radon_top.jpg

61 ms

contactus_top.jpg

contactus_top.jpg

62 ms

right_top.jpg

right_top.jpg

62 ms

logo_mid.jpg

logo_mid.jpg

117 ms

home_stop.jpg

home_stop.jpg

76 ms

consulting_off.jpg

consulting_off.jpg

89 ms

laboratory_off.jpg

laboratory_off.jpg

89 ms

calibration_off.jpg

calibration_off.jpg

89 ms

radon_off.jpg

radon_off.jpg

103 ms

contactus_off.jpg

contactus_off.jpg

104 ms

right_middle.jpg

right_middle.jpg

116 ms

logo_bottom.jpg

logo_bottom.jpg

117 ms

home_bottom.jpg

home_bottom.jpg

119 ms

consulting_bottom.jpg

consulting_bottom.jpg

130 ms

laboratory_bottom.jpg

laboratory_bottom.jpg

133 ms

calibration_bottom.jpg

calibration_bottom.jpg

143 ms

radon_bottom.jpg

radon_bottom.jpg

145 ms

contactus_bottom.jpg

contactus_bottom.jpg

145 ms

right_bottom.jpg

right_bottom.jpg

147 ms

home_header.jpg

home_header.jpg

159 ms

globe.jpg

globe.jpg

189 ms

quote.jpg

quote.jpg

237 ms

address.gif

address.gif

173 ms

consulting_on.jpg

consulting_on.jpg

31 ms

consulting_target.jpg

consulting_target.jpg

78 ms

laboratory_on.jpg

laboratory_on.jpg

31 ms

laboratory_target.jpg

laboratory_target.jpg

80 ms

calibration_on.jpg

calibration_on.jpg

51 ms

calibration_target.jpg

calibration_target.jpg

94 ms

radon_on.jpg

radon_on.jpg

66 ms

radon_target.jpg

radon_target.jpg

123 ms

contactus_on.jpg

contactus_on.jpg

92 ms

contactus_target.jpg

contactus_target.jpg

123 ms

Accessibility Review

rssi.us accessibility score

57

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

rssi.us 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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

rssi.us SEO score

62

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

High

Image elements do not have [alt] attributes

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 Rssi.us 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 Rssi.us 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

rssi.us

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