Tools & Wizards About Us

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

drnerz.com

Dr. Nerz-Stormes (Bryn Mawr College) Organic Chemistry Web Page

Page Load Speed

1.6 sec in total

First Response

647 ms

Resources Loaded

844 ms

Page Rendered

81 ms

About Website

Visit drnerz.com now to see the best up-to-date Dr Nerz content for United States and also check out these interesting facts you probably never knew about drnerz.com

This is the Home Page of the Bryn Mawr College Organic Chemistry Lab and Lectures of Maryellen Nerz Ph.D. This site contains links to in-class handouts, useful information for organic chemistry studen...

Visit drnerz.com

Key Findings

We analyzed Drnerz.com page load time and found that the first response time was 647 ms and then it took 925 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

drnerz.com performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.0 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.3 s

100/100

25%

SI (Speed Index)

Value1.2 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.0 s

100/100

10%

Network Requests Diagram

drnerz.com

647 ms

mnerzsto.css

48 ms

bmc.gif

64 ms

i.gif

10 ms

s10.g

68 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that 75% of them (6 requests) were addressed to the original Drnerz.com, 13% (1 request) were made to T1.extreme-dm.com and 13% (1 request) were made to E1.extreme-dm.com. The less responsive or slowest element that took the longest time to load (647 ms) belongs to the original domain Drnerz.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 12.4 kB (8%)

Content Size

149.3 kB

After Optimization

137.0 kB

  • HTML
  • Images

In fact, the total size of Drnerz.com main page is 149.3 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 136.8 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 9.4 kB

  • Original 12.6 kB
  • After minification 10.4 kB
  • After compression 3.1 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 2.1 kB, which is 17% 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 9.4 kB or 75% of the original size.

Image Optimization

-2%

Potential reduce by 2.9 kB

  • Original 136.8 kB
  • After minification 133.9 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. Dr Nerz images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

6

After Optimization

6

  • Images

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dr Nerz. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

drnerz.com accessibility score

72

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

Best Practices

drnerz.com 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

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

drnerz.com SEO score

67

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

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 Drnerz.com 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 Drnerz.com 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

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