Tools & Wizards About Us
combination.com screenshot

Report Summary

  • 28

    Performance

    Renders faster than
    47% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

combination.com

Advanced Process Combinatorics, Inc. | Scheduling, Optimization, Capacity Planning

Page Load Speed

5.7 sec in total

First Response

1.1 sec

Resources Loaded

3.7 sec

Page Rendered

837 ms

combination.com screenshot

About Website

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

VirtECSR offers a unique, mathematically sophisticated approach to modeling process scheduling problems.

Visit combination.com

Key Findings

We analyzed Combination.com page load time and found that the first response time was 1.1 sec and then it took 4.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

combination.com performance score

28

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

42/100

10%

LCP (Largest Contentful Paint)

Value14.7 s

0/100

25%

SI (Speed Index)

Value8.3 s

19/100

10%

TBT (Total Blocking Time)

Value1,150 ms

22/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value15.1 s

7/100

10%

Network Requests Diagram

combination.com

1115 ms

combination.com

1238 ms

app.css

84 ms

js

66 ms

app.js

129 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 42% of them (13 requests) were addressed to the original Combination.com, 16% (5 requests) were made to Youtube.com and 13% (4 requests) were made to Use.typekit.net. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Combination.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 74.5 kB (4%)

Content Size

1.9 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Combination.com main page is 1.9 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 19.1 kB

  • Original 23.5 kB
  • After minification 19.0 kB
  • After compression 4.5 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 4.6 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 19.1 kB or 81% of the original size.

Image Optimization

-1%

Potential reduce by 10.6 kB

  • Original 1.6 MB
  • After minification 1.6 MB

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. Combination images are well optimized though.

JavaScript Optimization

-21%

Potential reduce by 44.8 kB

  • Original 214.3 kB
  • After minification 214.1 kB
  • After compression 169.5 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 44.8 kB or 21% of the original size.

CSS Optimization

-0%

Potential reduce by 38 B

  • Original 80.3 kB
  • After minification 80.3 kB
  • After compression 80.2 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. Combination.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (38%)

Requests Now

24

After Optimization

15

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Combination. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

combination.com

combination.com

1115 ms

combination.com

combination.com

1238 ms

app.css

app.css

84 ms

js

js

66 ms

app.js

app.js

129 ms

asm7uka.css

asm7uka.css

70 ms

p.css

p.css

23 ms

diagonal-line.png

diagonal-line.png

37 ms

zCodBRmN9cg

zCodBRmN9cg

108 ms

logo.png

logo.png

99 ms

c87618c0-1de1-11ea-8467-559e3807cc34

c87618c0-1de1-11ea-8467-559e3807cc34

807 ms

ac040b00-1de6-11ea-a974-a75c0b5f4acd

ac040b00-1de6-11ea-a974-a75c0b5f4acd

882 ms

ef8b4720-1de9-11ea-b05c-97d79331f8ca

ef8b4720-1de9-11ea-b05c-97d79331f8ca

867 ms

ef8bbd00-1de9-11ea-ac2a-0bf169e1b358

ef8bbd00-1de9-11ea-ac2a-0bf169e1b358

924 ms

efc69470-1de9-11ea-b9d9-6d11cebcfe6e

efc69470-1de9-11ea-b9d9-6d11cebcfe6e

776 ms

336896b0-200c-11ea-aec8-8590b4e590db

336896b0-200c-11ea-aec8-8590b4e590db

1163 ms

tagline.png

tagline.png

814 ms

www-player.css

www-player.css

19 ms

www-embed-player.js

www-embed-player.js

50 ms

base.js

base.js

76 ms

d

d

3 ms

d

d

37 ms

d

d

48 ms

ad_status.js

ad_status.js

152 ms

RAiHx6Z8aI87xfn3BcPOACt6MzvCMtPfFa8gMAvLcEc.js

RAiHx6Z8aI87xfn3BcPOACt6MzvCMtPfFa8gMAvLcEc.js

99 ms

embed.js

embed.js

28 ms

KFOmCnqEu92Fr1Mu4mxP.ttf

KFOmCnqEu92Fr1Mu4mxP.ttf

36 ms

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

117 ms

id

id

31 ms

Create

Create

88 ms

GenerateIT

GenerateIT

13 ms

Accessibility Review

combination.com accessibility score

69

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

[role] values are not valid

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

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

combination.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Page has valid source maps

SEO Factors

combination.com SEO score

91

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

    N/A

  • Encoding

    UTF-8

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

combination.com

Open Graph data is detected on the main page of Combination. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: