Tools & Wizards About Us
dcdivers.com screenshot

Report Summary

  • 48

    Performance

    Renders faster than
    67% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 72% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

dcdivers.com

National Diving Center, Washington, DC's Only Dive Shop also serving Maryland and Virginia - Home

Page Load Speed

4.3 sec in total

First Response

668 ms

Resources Loaded

3.5 sec

Page Rendered

148 ms

dcdivers.com screenshot

About Website

Visit dcdivers.com now to see the best up-to-date DC Dive Rs content and also check out these interesting facts you probably never knew about dcdivers.com

The National Diving Center is your local Washington, DC dive shop specializing in dive travel, PADI certification classes, equipment and gear.

Visit dcdivers.com

Key Findings

We analyzed Dcdivers.com page load time and found that the first response time was 668 ms and then it took 3.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

dcdivers.com performance score

48

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

20/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

45/100

25%

SI (Speed Index)

Value4.2 s

78/100

10%

TBT (Total Blocking Time)

Value1,050 ms

25/100

30%

CLS (Cumulative Layout Shift)

Value0.079

94/100

15%

TTI (Time to Interactive)

Value6.8 s

55/100

10%

Network Requests Diagram

dcdivers.com

668 ms

template_css.css

435 ms

learn_to_dive.jpg

896 ms

Flamingosnail.jpg

1783 ms

diving_surface.jpg

1783 ms

Our browser made a total of 15 requests to load all elements on the main page. We found that all of those requests were addressed to Dcdivers.com and no external sources were called. The less responsive or slowest element that took the longest time to load (2.8 sec) belongs to the original domain Dcdivers.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 21.0 kB (20%)

Content Size

107.7 kB

After Optimization

86.7 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Dcdivers.com main page is 107.7 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 80.7 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 12.5 kB

  • Original 16.9 kB
  • After minification 15.6 kB
  • After compression 4.3 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. 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 12.5 kB or 74% of the original size.

Image Optimization

-0%

Potential reduce by 226 B

  • Original 80.7 kB
  • After minification 80.5 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. DC Dive Rs images are well optimized though.

CSS Optimization

-82%

Potential reduce by 8.2 kB

  • Original 10.1 kB
  • After minification 7.7 kB
  • After compression 1.8 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. Dcdivers.com needs all CSS files to be minified and compressed as it can save up to 8.2 kB or 82% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

14

After Optimization

14

  • Images
  • CSS

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of DC Dive Rs. According to our analytics all requests are already optimized.

Network Requests Diagram

dcdivers.com

dcdivers.com

668 ms

template_css.css

template_css.css

435 ms

learn_to_dive.jpg

learn_to_dive.jpg

896 ms

Flamingosnail.jpg

Flamingosnail.jpg

1783 ms

diving_surface.jpg

diving_surface.jpg

1783 ms

diving_bell.jpg

diving_bell.jpg

2846 ms

background.jpg

background.jpg

62 ms

header_short.jpg

header_short.jpg

301 ms

dive_flag.jpg

dive_flag.jpg

2399 ms

left_col_bg.png

left_col_bg.png

361 ms

subhead_bg.png

subhead_bg.png

421 ms

menu_bg.png

menu_bg.png

481 ms

contenthead.png

contenthead.png

510 ms

arrow.png

arrow.png

541 ms

button_bg.png

button_bg.png

570 ms

Accessibility Review

dcdivers.com accessibility score

89

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Links do not have a discernible name

Best Practices

dcdivers.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

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

dcdivers.com SEO score

92

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

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 Dcdivers.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 Dcdivers.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

dcdivers.com

Open Graph description is not detected on the main page of DC Dive Rs. 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: