Tools & Wizards About Us
chemister.ru screenshot

Report Summary

  • 55

    Performance

    Renders faster than
    72% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

chemister.ru

Химия и токсикология

Page Load Speed

4.1 sec in total

First Response

524 ms

Resources Loaded

3.2 sec

Page Rendered

394 ms

chemister.ru screenshot

About Website

Click here to check amazing Chemister content for Russia. Otherwise, check out these important facts you probably never knew about chemister.ru

Статьи по химии и токсикологии. Бесплатная база данных свойств веществ. Описание токсинов и токсичных веществ. Методики химических синтезов. Химические константы и свойства веществ.

Visit chemister.ru

Key Findings

We analyzed Chemister.ru page load time and found that the first response time was 524 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

chemister.ru performance score

55

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.2 s

99/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

77/100

25%

SI (Speed Index)

Value3.7 s

85/100

10%

TBT (Total Blocking Time)

Value3,200 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value12.2 s

15/100

10%

Network Requests Diagram

chemister.ru

524 ms

index_style.css

132 ms

js

92 ms

adsbygoogle.js

162 ms

tag.js

839 ms

Our browser made a total of 65 requests to load all elements on the main page. We found that 6% of them (4 requests) were addressed to the original Chemister.ru, 17% (11 requests) were made to Pagead2.googlesyndication.com and 14% (9 requests) were made to Tpc.googlesyndication.com. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Static.yoomoney.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 546.7 kB (33%)

Content Size

1.7 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemister.ru main page is 1.7 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. 60% of websites need less resources to load. Javascripts take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 48.5 kB

  • Original 63.2 kB
  • After minification 61.5 kB
  • After compression 14.7 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 48.5 kB or 77% of the original size.

Image Optimization

-5%

Potential reduce by 11.5 kB

  • Original 254.0 kB
  • After minification 242.5 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. Chemister images are well optimized though.

JavaScript Optimization

-36%

Potential reduce by 486.5 kB

  • Original 1.3 MB
  • After minification 1.3 MB
  • After compression 860.5 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 486.5 kB or 36% of the original size.

CSS Optimization

-21%

Potential reduce by 138 B

  • Original 667 B
  • After minification 667 B
  • After compression 529 B

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. Chemister.ru needs all CSS files to be minified and compressed as it can save up to 138 B or 21% of the original size.

Requests Breakdown

Number of requests can be reduced by 34 (64%)

Requests Now

53

After Optimization

19

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemister. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

chemister.ru

chemister.ru

524 ms

index_style.css

index_style.css

132 ms

js

js

92 ms

adsbygoogle.js

adsbygoogle.js

162 ms

tag.js

tag.js

839 ms

branding.css

branding.css

30 ms

poweredby_FFFFFF.gif

poweredby_FFFFFF.gif

28 ms

empty.gif

empty.gif

137 ms

logo.gif

logo.gif

256 ms

branding.css

branding.css

143 ms

show_ads_impl.js

show_ads_impl.js

281 ms

shop-widget

shop-widget

795 ms

hit

hit

553 ms

zrt_lookup.html

zrt_lookup.html

58 ms

ads

ads

466 ms

ads

ads

474 ms

ads

ads

315 ms

gen_204

gen_204

204 ms

pixel

pixel

194 ms

16519463165291563782

16519463165291563782

49 ms

abg_lite.js

abg_lite.js

24 ms

omrhp.js

omrhp.js

36 ms

Q12zgMmT.js

Q12zgMmT.js

49 ms

window_focus.js

window_focus.js

58 ms

qs_click_protection.js

qs_click_protection.js

57 ms

ufs_web_display.js

ufs_web_display.js

44 ms

icon.png

icon.png

27 ms

core-js-symbol.js)

core-js-symbol.js)

1025 ms

react-with-dom.min.js

react-with-dom.min.js

1255 ms

widget-shop.en.e1919426edbaeca6245f198b0f3dd48e.js

widget-shop.en.e1919426edbaeca6245f198b0f3dd48e.js

991 ms

widget-shop.3e1289466016276fc9fd.js

widget-shop.3e1289466016276fc9fd.js

1526 ms

reactive_library.js

reactive_library.js

196 ms

factor-io-regular.woff

factor-io-regular.woff

1106 ms

factor-io-medium.woff

factor-io-medium.woff

1107 ms

factor-io-light.woff

factor-io-light.woff

1247 ms

factor-io-bold.woff

factor-io-bold.woff

1269 ms

advert.gif

advert.gif

850 ms

62bHydCX.html

62bHydCX.html

135 ms

pixel

pixel

257 ms

pixel

pixel

256 ms

activeview

activeview

254 ms

wJiNEMIFAPB28UFvxM_UYtYFK_ILnv1_rxRzUTsn-Pg.js

wJiNEMIFAPB28UFvxM_UYtYFK_ILnv1_rxRzUTsn-Pg.js

211 ms

14659997284953752004

14659997284953752004

236 ms

load_preloaded_resource.js

load_preloaded_resource.js

210 ms

abg_lite.js

abg_lite.js

222 ms

60efddb729a951d3495fe79f6eb41a86.js

60efddb729a951d3495fe79f6eb41a86.js

282 ms

fullscreen_api_adapter.js

fullscreen_api_adapter.js

148 ms

interstitial_ad_frame.js

interstitial_ad_frame.js

152 ms

feedback_grey600_24dp.png

feedback_grey600_24dp.png

275 ms

settings_grey600_24dp.png

settings_grey600_24dp.png

275 ms

pixel

pixel

134 ms

13746198192508142033

13746198192508142033

132 ms

rum

rum

168 ms

gen_204

gen_204

186 ms

css

css

146 ms

activeview

activeview

159 ms

bounce

bounce

60 ms

pixel

pixel

38 ms

pixel

pixel

49 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpyw.ttf

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpyw.ttf

174 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

174 ms

rum

rum

166 ms

sync_cookie_image_decide

sync_cookie_image_decide

134 ms

yoomoney.ru

yoomoney.ru

325 ms

1

1

133 ms

Accessibility Review

chemister.ru accessibility score

81

Accessibility Issues

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

<frame> or <iframe> elements do not have a title

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

Heading elements are not in a sequentially-descending order

Best Practices

chemister.ru best practices score

83

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

High

Missing source maps for large first-party JavaScript

SEO Factors

chemister.ru SEO score

77

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    RU

  • Language Claimed

    RU

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chemister.ru can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it matches the claimed language. Our system also found out that Chemister.ru 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

chemister.ru

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