Tools & Wizards About Us
cmcsa.com screenshot

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

cmcsa.com

Investors | Comcast Corporation

Page Load Speed

2.9 sec in total

First Response

550 ms

Resources Loaded

2.1 sec

Page Rendered

246 ms

cmcsa.com screenshot

About Website

Click here to check amazing Cmcsa content for United States. Otherwise, check out these important facts you probably never knew about cmcsa.com

The Investor Relations website contains information about Comcast Corporation's business for stockholders, potential investors, and financial analysts.

Visit cmcsa.com

Key Findings

We analyzed Cmcsa.com page load time and found that the first response time was 550 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

cmcsa.com performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value12.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value37.8 s

0/100

25%

SI (Speed Index)

Value38.5 s

0/100

10%

TBT (Total Blocking Time)

Value500 ms

58/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value37.9 s

0/100

10%

Network Requests Diagram

cmcsa.com

550 ms

default.css

218 ms

wsh_default.css

182 ms

wsh_script_absent.css

53 ms

icons.css

394 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that 62% of them (43 requests) were addressed to the original Cmcsa.com, 13% (9 requests) were made to and 10% (7 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (901 ms) belongs to the original domain Cmcsa.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 603.1 kB (47%)

Content Size

1.3 MB

After Optimization

684.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cmcsa.com main page is 1.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 501.7 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 47.9 kB

  • Original 58.5 kB
  • After minification 47.5 kB
  • After compression 10.6 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. This page needs HTML code to be minified as it can gain 11.0 kB, which is 19% 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 47.9 kB or 82% of the original size.

Image Optimization

-2%

Potential reduce by 7.8 kB

  • Original 501.7 kB
  • After minification 493.9 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. Cmcsa images are well optimized though.

JavaScript Optimization

-55%

Potential reduce by 146.8 kB

  • Original 268.4 kB
  • After minification 244.6 kB
  • After compression 121.6 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 146.8 kB or 55% of the original size.

CSS Optimization

-87%

Potential reduce by 400.5 kB

  • Original 458.5 kB
  • After minification 367.1 kB
  • After compression 58.0 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. Cmcsa.com needs all CSS files to be minified and compressed as it can save up to 400.5 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 42 (75%)

Requests Now

56

After Optimization

14

  • Images
  • JavaScript
  • CSS

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cmcsa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

cmcsa.com

cmcsa.com

550 ms

default.css

default.css

218 ms

wsh_default.css

wsh_default.css

182 ms

wsh_script_absent.css

wsh_script_absent.css

53 ms

icons.css

icons.css

394 ms

ir.css

ir.css

379 ms

tablet.css

tablet.css

341 ms

ndq-overwrite.css

ndq-overwrite.css

222 ms

scl3vsx.js

scl3vsx.js

104 ms

modernizr.custom.06578.js

modernizr.custom.06578.js

268 ms

ndq-filetypes.css

ndq-filetypes.css

224 ms

ndq-icons.css

ndq-icons.css

335 ms

sh_scripts.js

sh_scripts.js

479 ms

jquery-1.7.2.min.js

jquery-1.7.2.min.js

901 ms

bootstrap-transition.js

bootstrap-transition.js

343 ms

bootstrap-carousel.js

bootstrap-carousel.js

469 ms

bootstrap-collapse.js

bootstrap-collapse.js

397 ms

bootstrap-modal.js

bootstrap-modal.js

464 ms

navigation.js

navigation.js

470 ms

search.js

search.js

485 ms

modal.js

modal.js

494 ms

toolbox.js

toolbox.js

497 ms

carousel.js

carousel.js

540 ms

collapse.js

collapse.js

513 ms

ios-orientationchange-fix.js

ios-orientationchange-fix.js

520 ms

hide-mobile-address-bar.js

hide-mobile-address-bar.js

523 ms

ndq-custom.js

ndq-custom.js

533 ms

jquery.cookie.js

jquery.cookie.js

544 ms

s_code_baseline_dev_v3.js

s_code_baseline_dev_v3.js

551 ms

exLinks.js

exLinks.js

566 ms

ndq-icon-swap.js

ndq-icon-swap.js

566 ms

d

d

199 ms

tile.png

tile.png

89 ms

logo.png

logo.png

106 ms

carat.png

carat.png

91 ms

mobile_expander.png

mobile_expander.png

79 ms

search_icon.png

search_icon.png

91 ms

IR_CC_1.jpg

IR_CC_1.jpg

368 ms

patternGradient.png

patternGradient.png

156 ms

pattern100.png

pattern100.png

185 ms

cmcst_ir_sprites.png

cmcst_ir_sprites.png

203 ms

list_border_bottom.png

list_border_bottom.png

212 ms

gSJX261AAAA

gSJX261AAAA

12 ms

t9thp11222OvffaH93HQIYcdcdQxx51w0imnnXHWOeddcNEll11x1TXX5brhplvhjd1x1z157nsgX4GHCj1S5LEnnnrmuRdeeuW1N956570PPv4EiV9utQAAAA==

t9thp11222OvffaH93HQIYcdcdQxx51w0imnnXHWOeddcNEll11x1TXX5brhplvhjd1x1z157nsgX4GHCj1S5LEnnnrmuRdeeuW1N956570PPv4EiV9utQAAAA==

11 ms

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11 ms

gSJX261AAAA

gSJX261AAAA

10 ms

dx0CGHHXHUMcedcNIpp51x1jnnXXDRJZddcdU11+W64aZb4Y3dcdc9ee57IF+Bhwo9UuSxJ5565rkXXnrltTfeeue9Dz7+BIlfbrUAAAA=

dx0CGHHXHUMcedcNIpp51x1jnnXXDRJZddcdU11+W64aZb4Y3dcdc9ee57IF+Bhwo9UuSxJ5565rkXXnrltTfeeue9Dz7+BIlfbrUAAAA=

10 ms

logo_footer.png

logo_footer.png

197 ms

ndqfonticons.woff

ndqfonticons.woff

229 ms

cse.js

cse.js

74 ms

dx0CGHHXHUMcedcNIpp51x1jnnXXDRJZddcdU11+W64aZb4Y3dcdc9ee57IF+Bhwo9UuSxJ5565rkXXnrltTfeeue9Dz7+BIlfbrUAAAA=

dx0CGHHXHUMcedcNIpp51x1jnnXXDRJZddcdU11+W64aZb4Y3dcdc9ee57IF+Bhwo9UuSxJ5565rkXXnrltTfeeue9Dz7+BIlfbrUAAAA=

12 ms

dx0CGHHXHUMcedcNIpp51x1jnnXXDRJZddcdU11+W64aZb4Y3dcdc9ee57IF+Bhwo9UuSxJ5565rkXXnrltTfeeue9Dz7+BIlfbrUAAAA=

dx0CGHHXHUMcedcNIpp51x1jnnXXDRJZddcdU11+W64aZb4Y3dcdc9ee57IF+Bhwo9UuSxJ5565rkXXnrltTfeeue9Dz7+BIlfbrUAAAA=

12 ms

O+y0y2577LXPfgfC+zjksCOOOua4E0465bQzzjrnvAsuuuSyK6665robctx0y+3wxu66574HHnrksVxPPJXnmXzPvVDgpVdee+Otd9774KNPPv8Gmu9uvQAAAA==

O+y0y2577LXPfgfC+zjksCOOOua4E0465bQzzjrnvAsuuuSyK6665robctx0y+3wxu66574HHnrksVxPPJXnmXzPvVDgpVdee+Otd9774KNPPv8Gmu9uvQAAAA==

11 ms

O+y0y2577LXPfgfC+zjksCOOOua4E0465bQzzjrnvAsuuuSyK6665robctx0y+3wxu66574HHnrksVxPPJXnmXzPvVDgpVdee+Otd9774KNPPv8Gmu9uvQAAAA==

O+y0y2577LXPfgfC+zjksCOOOua4E0465bQzzjrnvAsuuuSyK6665robctx0y+3wxu66574HHnrksVxPPJXnmXzPvVDgpVdee+Otd9774KNPPv8Gmu9uvQAAAA==

11 ms

p.gif

p.gif

133 ms

cse.js

cse.js

111 ms

s89807227612473

s89807227612473

10 ms

wsh_print.css

wsh_print.css

157 ms

s86267941538244

s86267941538244

11 ms

jsapi

jsapi

39 ms

default+en.css

default+en.css

4 ms

default.css

default.css

40 ms

default+en.I.js

default+en.I.js

13 ms

mobile.css

mobile.css

238 ms

default.css

default.css

17 ms

trackpage.aspx

trackpage.aspx

114 ms

async-ads.js

async-ads.js

58 ms

small-logo.png

small-logo.png

21 ms

search_box_icon.png

search_box_icon.png

15 ms

Accessibility Review

cmcsa.com accessibility score

96

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

Best Practices

cmcsa.com best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

cmcsa.com SEO score

90

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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cmcsa.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 Cmcsa.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

cmcsa.com

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