Tools & Wizards About Us
4chem.com screenshot

Report Summary

  • 92

    Performance

    Renders faster than
    92% of other websites

  • 50

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

4chem.com

Page Load Speed

3.5 sec in total

First Response

128 ms

Resources Loaded

2.8 sec

Page Rendered

568 ms

4chem.com screenshot

About Website

Visit 4chem.com now to see the best up-to-date 4 Chem content for Saudi Arabia and also check out these interesting facts you probably never knew about 4chem.com

الموقع الاول للكيمياء فى الوطن العربى سلسلة نحو الكيمياء كيمياء , كيميائيين , معلم كيمياء , الكيمياء , اسئلة كيمياء , العناصر الانتقالية , عضوية , فيزيائية , تحليلية , غير عضوية , كيميائي , بكلوريوس ك...

Visit 4chem.com

Key Findings

We analyzed 4chem.com page load time and found that the first response time was 128 ms and then it took 3.4 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

4chem.com performance score

92

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

83/100

10%

LCP (Largest Contentful Paint)

Value2.7 s

85/100

25%

SI (Speed Index)

Value2.1 s

99/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.121

84/100

15%

TTI (Time to Interactive)

Value2.2 s

99/100

10%

Network Requests Diagram

4chem.com

128 ms

forum.php

502 ms

yuiloader-dom-event.js

97 ms

connection-min.js

51 ms

vbulletin-core.js

82 ms

Our browser made a total of 86 requests to load all elements on the main page. We found that 97% of them (83 requests) were addressed to the original 4chem.com, 2% (2 requests) were made to Apis.google.com and 1% (1 request) were made to Wieistmeineip.de. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain 4chem.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 385.4 kB (67%)

Content Size

578.5 kB

After Optimization

193.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 4chem.com main page is 578.5 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. 30% of websites need less resources to load. HTML takes 223.7 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 202.3 kB

  • Original 223.7 kB
  • After minification 213.8 kB
  • After compression 21.5 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. 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 202.3 kB or 90% of the original size.

Image Optimization

-3%

Potential reduce by 3.0 kB

  • Original 118.0 kB
  • After minification 115.0 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. 4 Chem images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 94.1 kB

  • Original 136.7 kB
  • After minification 135.4 kB
  • After compression 42.6 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 94.1 kB or 69% of the original size.

CSS Optimization

-86%

Potential reduce by 86.1 kB

  • Original 100.1 kB
  • After minification 77.6 kB
  • After compression 14.1 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. 4chem.com needs all CSS files to be minified and compressed as it can save up to 86.1 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 33 (40%)

Requests Now

83

After Optimization

50

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 83 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 4 Chem. 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 as a result speed up the page load time.

Network Requests Diagram

4chem.com

4chem.com

128 ms

forum.php

forum.php

502 ms

yuiloader-dom-event.js

yuiloader-dom-event.js

97 ms

connection-min.js

connection-min.js

51 ms

vbulletin-core.js

vbulletin-core.js

82 ms

css.php

css.php

292 ms

vbulletin_read_marker.js

vbulletin_read_marker.js

107 ms

css.php

css.php

601 ms

css.php

css.php

464 ms

vbulletin_md5.js

vbulletin_md5.js

164 ms

plusone.js

plusone.js

46 ms

ly_01.gif

ly_01.gif

108 ms

tp_01.gif

tp_01.gif

125 ms

new_lo_02.jpg

new_lo_02.jpg

142 ms

new_lo_03.jpg

new_lo_03.jpg

238 ms

new_lo_04.jpg

new_lo_04.jpg

387 ms

355 ms

bg.gif

bg.gif

194 ms

ly_003.gif

ly_003.gif

76 ms

new_lo_06.jpg

new_lo_06.jpg

150 ms

new_lo_05.jpg

new_lo_05.jpg

151 ms

new_lo_07.jpg

new_lo_07.jpg

163 ms

tp_04.gif

tp_04.gif

171 ms

tp_05.gif

tp_05.gif

221 ms

hd_01.jpg

hd_01.jpg

226 ms

hd_02.jpg

hd_02.jpg

234 ms

hd_04.jpg

hd_04.jpg

228 ms

m_bar_01.gif

m_bar_01.gif

280 ms

m_bar_02.gif

m_bar_02.gif

289 ms

m_bar_03.gif

m_bar_03.gif

256 ms

m_bar_04.gif

m_bar_04.gif

271 ms

m_bar_05.gif

m_bar_05.gif

288 ms

m_bar_06.gif

m_bar_06.gif

296 ms

m_bar_07.gif

m_bar_07.gif

304 ms

m_bar_09.gif

m_bar_09.gif

311 ms

m_bar_10.gif

m_bar_10.gif

320 ms

m_bar_11.gif

m_bar_11.gif

321 ms

m_bar_12.gif

m_bar_12.gif

328 ms

m_bar_14.gif

m_bar_14.gif

374 ms

m_bar_15.gif

m_bar_15.gif

335 ms

search_rtl.png

search_rtl.png

342 ms

navbit-home.png

navbit-home.png

350 ms

collapse_40b.png

collapse_40b.png

367 ms

forum_old_lock-48.png

forum_old_lock-48.png

398 ms

lastpost-left.png

lastpost-left.png

404 ms

users_online.png

users_online.png

436 ms

forum_stats.png

forum_stats.png

521 ms

legend.png

legend.png

488 ms

forum_new-16.png

forum_new-16.png

538 ms

forum_old-16.png

forum_old-16.png

595 ms

forum_lock-16.png

forum_lock-16.png

625 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

149 ms

category-16.png

category-16.png

485 ms

forum_link-16.png

forum_link-16.png

431 ms

cron.php

cron.php

442 ms

misc.php

misc.php

1069 ms

misc.php

misc.php

953 ms

misc.php

misc.php

1214 ms

ft_01.gif

ft_01.gif

435 ms

ft_02.gif

ft_02.gif

434 ms

ft_04_02.gif

ft_04_02.gif

443 ms

ft_04_03.gif

ft_04_03.gif

442 ms

ft_04_04.gif

ft_04_04.gif

452 ms

ft_04_06.gif

ft_04_06.gif

446 ms

ft_04_07.gif

ft_04_07.gif

431 ms

ft_06.gif

ft_06.gif

440 ms

ft_07.gif

ft_07.gif

448 ms

ly_03.gif

ly_03.gif

481 ms

ly_04.gif

ly_04.gif

619 ms

ly_06.gif

ly_06.gif

713 ms

tp_03.gif

tp_03.gif

724 ms

hd_03.jpg

hd_03.jpg

669 ms

m_bar_003.gif

m_bar_003.gif

728 ms

m_bar_08.gif

m_bar_08.gif

738 ms

newbtn_middle.png

newbtn_middle.png

747 ms

selected-tab-gradient-with-top-alpha.png

selected-tab-gradient-with-top-alpha.png

755 ms

arrow.png

arrow.png

837 ms

grey-up.png

grey-up.png

745 ms

gradient-greytowhite.png

gradient-greytowhite.png

768 ms

black_downward_arrow.png

black_downward_arrow.png

746 ms

ft_03.gif

ft_03.gif

733 ms

ft_04_01.gif

ft_04_01.gif

723 ms

ft_04_05.gif

ft_04_05.gif

687 ms

ft_05.gif

ft_05.gif

669 ms

activity.php

activity.php

1040 ms

post_old.gif

post_old.gif

165 ms

Accessibility Review

4chem.com accessibility score

50

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

Image elements do not have [alt] attributes

High

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

4chem.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

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

4chem.com SEO score

54

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

High

robots.txt is not valid

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

    N/A

  • Language Claimed

    AR

  • Encoding

    WINDOWS-1256

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 4chem.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Arabic. Our system also found out that 4chem.com main page’s claimed encoding is windows-1256. 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

4chem.com

Open Graph description is not detected on the main page of 4 Chem. 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: