Tools & Wizards About Us
lachimie.net screenshot

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 50

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

lachimie.net

Lachimie.net - cours de chimie composé de ressources didactiques en chimie pour apprendre les savoirs disciplinaires, les savoir-faire et compétences ...

Page Load Speed

4.9 sec in total

First Response

284 ms

Resources Loaded

4.3 sec

Page Rendered

264 ms

lachimie.net screenshot

About Website

Visit lachimie.net now to see the best up-to-date Lachimie content for Morocco and also check out these interesting facts you probably never knew about lachimie.net

La chimie.net est un cours en ligne de chimie présenant un ensemble de ressources didactiques pour apprendre et réviser les principaux savoirs disciplinaires, les savoir-faire et les compétences des g...

Visit lachimie.net

Key Findings

We analyzed Lachimie.net page load time and found that the first response time was 284 ms and then it took 4.6 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

lachimie.net performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

16/100

10%

LCP (Largest Contentful Paint)

Value9.2 s

1/100

25%

SI (Speed Index)

Value10.3 s

8/100

10%

TBT (Total Blocking Time)

Value3,710 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.109

87/100

15%

TTI (Time to Interactive)

Value25.1 s

0/100

10%

Network Requests Diagram

lachimie.net

284 ms

www.lachimie.net

247 ms

www.lachimie.net

332 ms

js

87 ms

menu.css

79 ms

Our browser made a total of 138 requests to load all elements on the main page. We found that 15% of them (21 requests) were addressed to the original Lachimie.net, 14% (20 requests) were made to Cm.g.doubleclick.net and 13% (18 requests) were made to Platform.twitter.com. The less responsive or slowest element that took the longest time to load (512 ms) relates to the external source Googleads.g.doubleclick.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 331.8 kB (35%)

Content Size

960.9 kB

After Optimization

629.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Lachimie.net main page is 960.9 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. 70% of websites need less resources to load. Javascripts take 536.7 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 65.3 kB

  • Original 80.4 kB
  • After minification 75.4 kB
  • After compression 15.1 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. 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 65.3 kB or 81% of the original size.

Image Optimization

-34%

Potential reduce by 111.8 kB

  • Original 333.0 kB
  • After minification 221.2 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. Obviously, Lachimie needs image optimization as it can save up to 111.8 kB or 34% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-28%

Potential reduce by 151.4 kB

  • Original 536.7 kB
  • After minification 536.6 kB
  • After compression 385.2 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 151.4 kB or 28% of the original size.

CSS Optimization

-30%

Potential reduce by 3.3 kB

  • Original 10.9 kB
  • After minification 8.3 kB
  • After compression 7.5 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. Lachimie.net needs all CSS files to be minified and compressed as it can save up to 3.3 kB or 30% of the original size.

Requests Breakdown

Number of requests can be reduced by 81 (65%)

Requests Now

125

After Optimization

44

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 125 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lachimie. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 46 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

lachimie.net

lachimie.net

284 ms

www.lachimie.net

www.lachimie.net

247 ms

www.lachimie.net

www.lachimie.net

332 ms

js

js

87 ms

menu.css

menu.css

79 ms

adsbygoogle.js

adsbygoogle.js

257 ms

jquery-ui.css

jquery-ui.css

37 ms

style.css

style.css

238 ms

jquery-1.12.4.js

jquery-1.12.4.js

46 ms

jquery-ui.js

jquery-ui.js

46 ms

widgets.js

widgets.js

105 ms

addthis_widget.js

addthis_widget.js

40 ms

addthis_widget.js

addthis_widget.js

39 ms

analytics.js

analytics.js

146 ms

all.js

all.js

144 ms

bannerfioles.png

bannerfioles.png

172 ms

logonew03.png

logonew03.png

176 ms

libellepub22.gif

libellepub22.gif

250 ms

up.gif

up.gif

258 ms

chimienet.png

chimienet.png

505 ms

c.png

c.png

357 ms

banner.chimistri3.png

banner.chimistri3.png

330 ms

chimie-test.png

chimie-test.png

446 ms

erlen45.png

erlen45.png

331 ms

erlen30jaune.png

erlen30jaune.png

339 ms

pixel.gif

pixel.gif

446 ms

jonction.gif

jonction.gif

447 ms

site-prime.gif

site-prime.gif

446 ms

index.04.gif

index.04.gif

475 ms

Bandeau_Sw.gif

Bandeau_Sw.gif

503 ms

enseignons.be.jpg

enseignons.be.jpg

503 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

105 ms

show_ads_impl.js

show_ads_impl.js

318 ms

all.js

all.js

15 ms

collect

collect

33 ms

settings

settings

77 ms

53 ms

collect

collect

41 ms

ga-audiences

ga-audiences

31 ms

timeline.e108540dddc96e4b707f5cf259a582d7.js

timeline.e108540dddc96e4b707f5cf259a582d7.js

21 ms

LachimieNet

LachimieNet

58 ms

polyfills-a40ef1678bae11e696dba45124eadd70.js

polyfills-a40ef1678bae11e696dba45124eadd70.js

20 ms

runtime-b1c52fd0a13ead5fcf6b.js

runtime-b1c52fd0a13ead5fcf6b.js

41 ms

modules-96ebc7ac3ad66d681a3d.js

modules-96ebc7ac3ad66d681a3d.js

64 ms

main-babd9234dc048fb47339.js

main-babd9234dc048fb47339.js

73 ms

_app-a9c9f1a99e4414675fb1.js

_app-a9c9f1a99e4414675fb1.js

89 ms

%5BscreenName%5D-0517bdda27d5006a5a2d.js

%5BscreenName%5D-0517bdda27d5006a5a2d.js

92 ms

_buildManifest.js

_buildManifest.js

102 ms

_ssgManifest.js

_ssgManifest.js

102 ms

8526.0c32a8f0cfc5749221a3.js

8526.0c32a8f0cfc5749221a3.js

41 ms

3438.6b749a04474f8fb0cbba.js

3438.6b749a04474f8fb0cbba.js

41 ms

zrt_lookup.html

zrt_lookup.html

52 ms

ads

ads

512 ms

ads

ads

330 ms

8283.f3e5048cca7cef5eed7f.js

8283.f3e5048cca7cef5eed7f.js

21 ms

3077.44bfeb00af01bc4020f6.js

3077.44bfeb00af01bc4020f6.js

36 ms

1362.42d432e02f7980bca032.js

1362.42d432e02f7980bca032.js

43 ms

4956.c4e51ef593974b9db0bb.js

4956.c4e51ef593974b9db0bb.js

75 ms

5893.d500bd2a89ded806aa73.js

5893.d500bd2a89ded806aa73.js

22 ms

ads

ads

331 ms

gen_204

gen_204

73 ms

pixel

pixel

71 ms

dv3.js

dv3.js

220 ms

window_focus.js

window_focus.js

19 ms

qs_click_protection.js

qs_click_protection.js

21 ms

ufs_web_display.js

ufs_web_display.js

16 ms

pixel

pixel

66 ms

gen_204

gen_204

76 ms

pixel

pixel

43 ms

pixel

pixel

45 ms

rum

rum

36 ms

pixel

pixel

28 ms

bounce

bounce

76 ms

reactive_library.js

reactive_library.js

345 ms

ca-pub-8489886197448490

ca-pub-8489886197448490

110 ms

rum

rum

65 ms

ad

ad

75 ms

ad

ad

83 ms

pixel

pixel

24 ms

8324732904621422289

8324732904621422289

190 ms

abg_lite.js

abg_lite.js

128 ms

omrhp.js

omrhp.js

127 ms

Q12zgMmT.js

Q12zgMmT.js

123 ms

icon.png

icon.png

122 ms

8964552396074085254

8964552396074085254

220 ms

ads

ads

426 ms

ads

ads

421 ms

ads

ads

416 ms

activeview

activeview

250 ms

62bHydCX.html

62bHydCX.html

132 ms

activeview

activeview

160 ms

shopping

shopping

146 ms

load_preloaded_resource.js

load_preloaded_resource.js

88 ms

abg_lite.js

abg_lite.js

86 ms

60efddb729a951d3495fe79f6eb41a86.js

60efddb729a951d3495fe79f6eb41a86.js

309 ms

fullscreen_api_adapter.js

fullscreen_api_adapter.js

70 ms

interstitial_ad_frame.js

interstitial_ad_frame.js

146 ms

pixel

pixel

161 ms

ad

ad

66 ms

pixel

pixel

260 ms

ad

ad

153 ms

feedback_grey600_24dp.png

feedback_grey600_24dp.png

291 ms

settings_grey600_24dp.png

settings_grey600_24dp.png

292 ms

gen_204

gen_204

148 ms

gen_204

gen_204

247 ms

css

css

239 ms

wJiNEMIFAPB28UFvxM_UYtYFK_ILnv1_rxRzUTsn-Pg.js

wJiNEMIFAPB28UFvxM_UYtYFK_ILnv1_rxRzUTsn-Pg.js

236 ms

10773991376516343614

10773991376516343614

195 ms

cookie_push_onload.html

cookie_push_onload.html

214 ms

pixel

pixel

134 ms

pixel

pixel

133 ms

activeview

activeview

174 ms

activeview

activeview

170 ms

setuid

setuid

88 ms

rum

rum

39 ms

pixel

pixel

36 ms

usersync.aspx

usersync.aspx

168 ms

pixel

pixel

257 ms

rum

rum

135 ms

ea8FacM9Wef3EJPWRrHjgE4B6CnlZxHVDv79pA.ttf

ea8FacM9Wef3EJPWRrHjgE4B6CnlZxHVDv79pA.ttf

332 ms

ea8IacM9Wef3EJPWRrHjgE4B6CnlZxHVBg3etBD7SQ.ttf

ea8IacM9Wef3EJPWRrHjgE4B6CnlZxHVBg3etBD7SQ.ttf

334 ms

pixel

pixel

103 ms

pixel

pixel

101 ms

pixel

pixel

73 ms

pixel

pixel

71 ms

pixel

pixel

71 ms

sodar

sodar

110 ms

pixel

pixel

18 ms

pixel

pixel

14 ms

pixel

pixel

18 ms

pixel

pixel

14 ms

sodar2.js

sodar2.js

4 ms

runner.html

runner.html

5 ms

aframe

aframe

29 ms

pixel

pixel

23 ms

pixel

pixel

77 ms

pixel

pixel

14 ms

spacer.gif

spacer.gif

140 ms

Accessibility Review

lachimie.net accessibility score

79

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.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Definition list items are not wrapped in <dl> elements

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

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

Links do not have a discernible name

Best Practices

lachimie.net best practices score

50

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

lachimie.net SEO score

79

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

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

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

    N/A

  • Language Claimed

    FR

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lachimie.net 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 French. Our system also found out that Lachimie.net 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

lachimie.net

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