Tools & Wizards About Us

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

erls.com

Elimination of Radioactive Light Sources | Seiler Instrument

Page Load Speed

1.3 sec in total

First Response

179 ms

Resources Loaded

985 ms

Page Rendered

110 ms

About Website

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

Seiler's ERLS Program offers tritium to LED illumination kits which eliminates the use of radioactive light sources.

Visit erls.com

Key Findings

We analyzed Erls.com page load time and found that the first response time was 179 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

erls.com performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

13/100

10%

LCP (Largest Contentful Paint)

Value5.9 s

14/100

25%

SI (Speed Index)

Value10.1 s

9/100

10%

TBT (Total Blocking Time)

Value1,170 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value0.358

30/100

15%

TTI (Time to Interactive)

Value9.6 s

29/100

10%

Network Requests Diagram

erls.com

179 ms

wp-signup.php

306 ms

wup7csq.js

154 ms

events_manager.css

20 ms

main.css

21 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Erls.com, 82% (32 requests) were made to Seilerinst.com and 3% (1 request) were made to Use.typekit.net. The less responsive or slowest element that took the longest time to load (306 ms) relates to the external source Seilerinst.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 447.6 kB (70%)

Content Size

638.9 kB

After Optimization

191.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Erls.com main page is 638.9 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. 45% of websites need less resources to load. Javascripts take 507.8 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 15.8 kB

  • Original 21.5 kB
  • After minification 20.4 kB
  • After compression 5.7 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 15.8 kB or 74% of the original size.

Image Optimization

-54%

Potential reduce by 15.8 kB

  • Original 29.2 kB
  • After minification 13.4 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, Erls needs image optimization as it can save up to 15.8 kB or 54% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-69%

Potential reduce by 348.9 kB

  • Original 507.8 kB
  • After minification 461.4 kB
  • After compression 158.9 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 348.9 kB or 69% of the original size.

CSS Optimization

-83%

Potential reduce by 67.1 kB

  • Original 80.5 kB
  • After minification 56.9 kB
  • After compression 13.3 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. Erls.com needs all CSS files to be minified and compressed as it can save up to 67.1 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 25 (78%)

Requests Now

32

After Optimization

7

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Erls. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

erls.com accessibility score

88

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.

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

erls.com 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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

erls.com SEO score

98

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](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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Erls.com 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 Erls.com 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 description is not detected on the main page of Erls. 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: