Tools & Wizards About Us
zahav.elementy.ru screenshot

Report Summary

  • 37

    Performance

    Renders faster than
    56% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 36% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

zahav.elementy.ru

«Элементы большой науки» — популярный сайт о фундаментальной науке: физика, биология, химия, математика, лингвистика

Page Load Speed

7.6 sec in total

First Response

511 ms

Resources Loaded

6.4 sec

Page Rendered

666 ms

zahav.elementy.ru screenshot

About Website

Welcome to zahav.elementy.ru homepage info - get ready to check Zahav Elementy best content for Russia right away, or after learning these important things about zahav.elementy.ru

Сайт о науке: новости науки, научно-популярные статьи, лекции, задачи, плакаты, видео, ответы на детские вопросы. Тематические разделы: Большой адронный коллайдер, «Масштабы», научно-популярная энцикл...

Visit zahav.elementy.ru

Key Findings

We analyzed Zahav.elementy.ru page load time and found that the first response time was 511 ms and then it took 7.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

zahav.elementy.ru performance score

37

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

10/100

10%

LCP (Largest Contentful Paint)

Value9.8 s

0/100

25%

SI (Speed Index)

Value6.8 s

34/100

10%

TBT (Total Blocking Time)

Value510 ms

57/100

30%

CLS (Cumulative Layout Shift)

Value0.005

100/100

15%

TTI (Time to Interactive)

Value41.1 s

0/100

10%

Network Requests Diagram

zahav.elementy.ru

511 ms

elementy.ru

391 ms

elementy.ru

668 ms

style2.css

143 ms

styles-print.css

271 ms

Our browser made a total of 193 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Zahav.elementy.ru, 92% (178 requests) were made to Elementy.ru and 2% (4 requests) were made to Mc.yandex.com. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Mc.yandex.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 704.2 kB (9%)

Content Size

7.5 MB

After Optimization

6.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zahav.elementy.ru main page is 7.5 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. 65% of websites need less resources to load. Images take 7.1 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 144.0 kB

  • Original 177.9 kB
  • After minification 163.5 kB
  • After compression 33.8 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 144.0 kB or 81% of the original size.

Image Optimization

-8%

Potential reduce by 549.5 kB

  • Original 7.1 MB
  • After minification 6.5 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. Zahav Elementy images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 2.8 kB

  • Original 208.1 kB
  • After minification 208.1 kB
  • After compression 205.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-18%

Potential reduce by 7.8 kB

  • Original 42.7 kB
  • After minification 42.7 kB
  • After compression 35.0 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. Zahav.elementy.ru needs all CSS files to be minified and compressed as it can save up to 7.8 kB or 18% of the original size.

Requests Breakdown

Number of requests can be reduced by 25 (14%)

Requests Now

178

After Optimization

153

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 178 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zahav Elementy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zahav.elementy.ru

zahav.elementy.ru

511 ms

elementy.ru

elementy.ru

391 ms

elementy.ru

elementy.ru

668 ms

style2.css

style2.css

143 ms

styles-print.css

styles-print.css

271 ms

MathJax.js

MathJax.js

514 ms

es5-shims.min.js

es5-shims.min.js

381 ms

share.js

share.js

603 ms

menu.js

menu.js

388 ms

hor.js

hor.js

389 ms

request.js

request.js

389 ms

scroll.js

scroll.js

391 ms

more.js

more.js

399 ms

ttlhover.js

ttlhover.js

520 ms

rfilters.js

rfilters.js

520 ms

linkhint.js

linkhint.js

517 ms

top100.jcn

top100.jcn

1004 ms

styles-hpad.css

styles-hpad.css

373 ms

styles-vpad.css

styles-vpad.css

380 ms

styles-phone.css

styles-phone.css

492 ms

styles-vphone.css

styles-vphone.css

491 ms

styles-hphone.css

styles-hphone.css

495 ms

TeX-AMS-MML_HTMLorMML.js

TeX-AMS-MML_HTMLorMML.js

430 ms

search_b.png

search_b.png

138 ms

smart_t_rex_logo_390.jpg

smart_t_rex_logo_390.jpg

393 ms

orca_species_logo_390.jpg

orca_species_logo_390.jpg

300 ms

hunting_through_endurance_running_in_humans_logo_390.jpg

hunting_through_endurance_running_in_humans_logo_390.jpg

382 ms

elephants_greeting_logo_390.jpg

elephants_greeting_logo_390.jpg

399 ms

potd_pachyiulus_krivolutskyi_1_570.jpg

potd_pachyiulus_krivolutskyi_1_570.jpg

397 ms

markov_sergei_itogi_ii_2023_390x260.jpg

markov_sergei_itogi_ii_2023_390x260.jpg

508 ms

okruzhnosti_villarso_i_plastinchatyy_tor_logo_390.png

okruzhnosti_villarso_i_plastinchatyy_tor_logo_390.png

682 ms

brain_570.gif

brain_570.gif

637 ms

triangles_in_cube_problem_logo_570.jpg

triangles_in_cube_problem_logo_570.jpg

781 ms

etyudy_o_chastitsakh_logo_200.png

etyudy_o_chastitsakh_logo_200.png

532 ms

daniel_kaneman_i_teoriya_perspektiv_logo_200.png

daniel_kaneman_i_teoriya_perspektiv_logo_200.png

535 ms

sibirskiy_tashkentskiy_proekt_logo_200.png

sibirskiy_tashkentskiy_proekt_logo_200.png

661 ms

nauchno_obrazovatelnye_sputniki_space_logo_200.png

nauchno_obrazovatelnye_sputniki_space_logo_200.png

793 ms

aleksenko_aleksey_sex_s_uchenymi_200.jpg

aleksenko_aleksey_sex_s_uchenymi_200.jpg

670 ms

kazantseva_otkuda_berutsya_deti_200.jpg

kazantseva_otkuda_berutsya_deti_200.jpg

765 ms

mukherjee_tzar_vsekh_bolezney_200.jpg

mukherjee_tzar_vsekh_bolezney_200.jpg

794 ms

goryashko_gaga_200.jpg

goryashko_gaga_200.jpg

809 ms

lhc-puzzles-2018-01_420.jpg

lhc-puzzles-2018-01_420.jpg

813 ms

ritchie_stewart_chush_200.jpg

ritchie_stewart_chush_200.jpg

1019 ms

levin_etudy_o_chastitsakh_200.jpg

levin_etudy_o_chastitsakh_200.jpg

928 ms

ferguson_doom_200.jpg

ferguson_doom_200.jpg

1064 ms

losos_ot_savanny_do_divana_200.jpg

losos_ot_savanny_do_divana_200.jpg

932 ms

falcke_svet_vo_tme_200.jpg

falcke_svet_vo_tme_200.jpg

1084 ms

safina_karl_vospitanie_dikosti_200.jpg

safina_karl_vospitanie_dikosti_200.jpg

958 ms

akshitsev_itogi_2023_v_ekologii_570x380.jpg

akshitsev_itogi_2023_v_ekologii_570x380.jpg

1189 ms

polovnikov_itogi_2023_v_phizike_570x380_3.jpg

polovnikov_itogi_2023_v_phizike_570x380_3.jpg

1082 ms

drobyshevskiy_antopologicheskie_itogi_2023_570x380.jpg

drobyshevskiy_antopologicheskie_itogi_2023_570x380.jpg

1221 ms

kvartalnov_itogi_2023_v_zp_570x380.jpg

kvartalnov_itogi_2023_v_zp_570x380.jpg

1413 ms

zhitenev_itogi_2023_v_archologii_570x380.jpg

zhitenev_itogi_2023_v_archologii_570x380.jpg

1200 ms

seregin_itogi_2023_v_botanike_570x380_a.jpg

seregin_itogi_2023_v_botanike_570x380_a.jpg

1343 ms

pipersky_2023_lingvistika_570x380.jpg

pipersky_2023_lingvistika_570x380.jpg

1374 ms

gomyranov_arktika_570x380.jpg

gomyranov_arktika_570x380.jpg

1326 ms

vereschagin_volki_570x380.jpg

vereschagin_volki_570x380.jpg

1339 ms

ivanova_v_pogone_za_nosorogom_570x380.jpg

ivanova_v_pogone_za_nosorogom_570x380.jpg

1347 ms

hit

hit

525 ms

watch.js

watch.js

1 ms

analytics.js

analytics.js

16 ms

eae26a98-3aa9-4984-b4f9-bb7bccc63dc4.woff

eae26a98-3aa9-4984-b4f9-bb7bccc63dc4.woff

1325 ms

collect

collect

12 ms

collect

collect

30 ms

js

js

53 ms

5cca825c-0636-4eca-92b4-828ee7e97873.woff

5cca825c-0636-4eca-92b4-828ee7e97873.woff

1206 ms

gerbera-medium-webfont-western.woff

gerbera-medium-webfont-western.woff

1178 ms

gerbera-light-webfont-western.woff

gerbera-light-webfont-western.woff

1127 ms

abffaaf4-47e3-4728-b5d9-e70fb0469d20.woff

abffaaf4-47e3-4728-b5d9-e70fb0469d20.woff

1155 ms

b2c1deff-0418-435f-bb4e-c0314131ce38.woff

b2c1deff-0418-435f-bb4e-c0314131ce38.woff

1150 ms

6b97bc44-0694-4e21-be5c-e5e226b3a086.woff

6b97bc44-0694-4e21-be5c-e5e226b3a086.woff

1241 ms

3204d591-3abc-4ee1-be56-37c5fb561f9f.woff

3204d591-3abc-4ee1-be56-37c5fb561f9f.woff

1132 ms

7e834bb7-b45c-4282-8649-42bc140198a9.woff

7e834bb7-b45c-4282-8649-42bc140198a9.woff

1108 ms

75f1f04b-cd60-43b8-bbc5-a1bb6a909105.woff

75f1f04b-cd60-43b8-bbc5-a1bb6a909105.woff

1106 ms

aviation_390.jpg

aviation_390.jpg

1035 ms

spectrum_390.jpg

spectrum_390.jpg

1018 ms

moment_390.jpg

moment_390.jpg

1054 ms

human_390.jpg

human_390.jpg

1055 ms

tag.js

tag.js

794 ms

fractals_390.jpg

fractals_390.jpg

979 ms

gravity_390.jpg

gravity_390.jpg

996 ms

perpetuum_390.jpg

perpetuum_390.jpg

1000 ms

collider_logo_390.jpg

collider_logo_390.jpg

1021 ms

time-zepto-2-compound-2_570.jpg

time-zepto-2-compound-2_570.jpg

1043 ms

vsenauka_knigi_512.jpg

vsenauka_knigi_512.jpg

1053 ms

vertdider_sapolski_512.jpg

vertdider_sapolski_512.jpg

946 ms

laba_512.jpg

laba_512.jpg

975 ms

inst_loseva_512.jpg

inst_loseva_512.jpg

973 ms

d1d5b1c5450b96a15c45a1bc7a07c811.jpg

d1d5b1c5450b96a15c45a1bc7a07c811.jpg

936 ms

9118613938ac0973d8695d2e58ed21c4.jpg

9118613938ac0973d8695d2e58ed21c4.jpg

922 ms

---lin---_livejournal_com_01_512.jpg

---lin---_livejournal_com_01_512.jpg

915 ms

yt_matem_prosto_512.jpg

yt_matem_prosto_512.jpg

925 ms

90779781a19da2926a5fc2995024b283.jpg

90779781a19da2926a5fc2995024b283.jpg

861 ms

euronews_512.jpg

euronews_512.jpg

866 ms

yt_sharifov_512.jpg

yt_sharifov_512.jpg

865 ms

brian_davies_390.jpg

brian_davies_390.jpg

795 ms

vladimir_voevodsky_1_390.jpg

vladimir_voevodsky_1_390.jpg

793 ms

gamow_and_co_70_anniversary_of_the_hot_universe_theory_6_345.jpg

gamow_and_co_70_anniversary_of_the_hot_universe_theory_6_345.jpg

802 ms

zaliznyak_13.02.2017_05_390.jpg

zaliznyak_13.02.2017_05_390.jpg

831 ms

burlak_390.jpg

burlak_390.jpg

828 ms

ghilyarov_345.jpg

ghilyarov_345.jpg

809 ms

varfolomeevskaya_notch_345.jpg

varfolomeevskaya_notch_345.jpg

792 ms

gross_interview_345.jpg

gross_interview_345.jpg

760 ms

reimers_570.jpg

reimers_570.jpg

779 ms

the_invention_of_science_7_345.jpg

the_invention_of_science_7_345.jpg

811 ms

oaez_390.jpg

oaez_390.jpg

792 ms

observation_of_gravitational_waves-from_a_binary_black_hole_merger_2_345.jpg

observation_of_gravitational_waves-from_a_binary_black_hole_merger_2_345.jpg

803 ms

arnold_570.jpg

arnold_570.jpg

766 ms

ginsburg_345.jpg

ginsburg_345.jpg

763 ms

cmsinner_logo_390.jpg

cmsinner_logo_390.jpg

781 ms

salazar_570.jpg

salazar_570.jpg

807 ms

advert.gif

advert.gif

1893 ms

fig33_zermatt_glacier_345.jpg

fig33_zermatt_glacier_345.jpg

798 ms

karl_schwarzschild_metric_1_390.jpg

karl_schwarzschild_metric_1_390.jpg

807 ms

zaliznyak_mumi-troll_17.02.2014_fig1_390.jpg

zaliznyak_mumi-troll_17.02.2014_fig1_390.jpg

816 ms

bismut_logo_390.jpg

bismut_logo_390.jpg

805 ms

gross_2011_570.jpg

gross_2011_570.jpg

810 ms

zaliznyak_enclitics_fig2_390.jpg

zaliznyak_enclitics_fig2_390.jpg

817 ms

osn_pon_390.jpg

osn_pon_390.jpg

809 ms

solzh_a_a_zaliznyak_390.jpg

solzh_a_a_zaliznyak_390.jpg

797 ms

general_theory_of_relativity_century_1_345.jpg

general_theory_of_relativity_century_1_345.jpg

811 ms

zaliznyak_gramoty_fig29_390.jpg

zaliznyak_gramoty_fig29_390.jpg

807 ms

cuneiform_2_345.jpg

cuneiform_2_345.jpg

813 ms

hemimastigophora_novel_supra_kingdom_level_lineage_logo_390.jpg

hemimastigophora_novel_supra_kingdom_level_lineage_logo_390.jpg

816 ms

structutnyi_cvet_v_zhivoi_prirode_0_390.jpg

structutnyi_cvet_v_zhivoi_prirode_0_390.jpg

803 ms

steven_weinberg_to_explain_the_world_(cover)_390.jpg

steven_weinberg_to_explain_the_world_(cover)_390.jpg

792 ms

discoveries_of_quasars_and_pulsars_jubilees_logo_390.jpg

discoveries_of_quasars_and_pulsars_jubilees_logo_390.jpg

816 ms

centenary_of_the_first_february_revolution_logo_390.jpg

centenary_of_the_first_february_revolution_logo_390.jpg

806 ms

calorie_390.jpg

calorie_390.jpg

812 ms

zaliznyak_mumi-troll_05.02.2010_fig3_390.jpg

zaliznyak_mumi-troll_05.02.2010_fig3_390.jpg

831 ms

iceworlds_icefall_pamirs_390.jpg

iceworlds_icefall_pamirs_390.jpg

816 ms

watson_&_watson_345.jpg

watson_&_watson_345.jpg

796 ms

gmo_fig10_gelfand_345.jpg

gmo_fig10_gelfand_345.jpg

815 ms

naturalna_li_estestvennost_13_390.jpg

naturalna_li_estestvennost_13_390.jpg

808 ms

penrose_570.jpg

penrose_570.jpg

812 ms

linguist_2_390.jpg

linguist_2_390.jpg

825 ms

gross_570.jpg

gross_570.jpg

817 ms

pyatigorsky_1_345.jpg

pyatigorsky_1_345.jpg

788 ms

fon_der_flaas_345.jpg

fon_der_flaas_345.jpg

803 ms

molekulyarnaya_evolutsiya_logo_390.jpg

molekulyarnaya_evolutsiya_logo_390.jpg

814 ms

escher_reptiles_390.jpg

escher_reptiles_390.jpg

812 ms

dyson_570.jpg

dyson_570.jpg

819 ms

empedocles_logo_390.jpg

empedocles_logo_390.jpg

815 ms

watson_570.jpg

watson_570.jpg

799 ms

paleo_logo_390.jpg

paleo_logo_390.jpg

805 ms

linde_570.jpg

linde_570.jpg

807 ms

igor_ivanov_mgnovenie_570.jpg

igor_ivanov_mgnovenie_570.jpg

809 ms

pyatigorsky_dni_nauki_2007_570.jpg

pyatigorsky_dni_nauki_2007_570.jpg

814 ms

mather_570.jpg

mather_570.jpg

812 ms

ginzburg-sverhprovodimost_200.jpg

ginzburg-sverhprovodimost_200.jpg

803 ms

zaliznyak_sanskrit_3_390.jpg

zaliznyak_sanskrit_3_390.jpg

796 ms

emmy_noether_and_her_theorem_logo_390.jpg

emmy_noether_and_her_theorem_logo_390.jpg

799 ms

gelfand_390.jpg

gelfand_390.jpg

805 ms

wanninger_570.jpg

wanninger_570.jpg

814 ms

science_news_symbyogenesis_1_390_.jpg

science_news_symbyogenesis_1_390_.jpg

814 ms

messing_570.jpg

messing_570.jpg

810 ms

bio_cover_6_178.jpg

bio_cover_6_178.jpg

800 ms

ft_logo.png

ft_logo.png

796 ms

basis2.png

basis2.png

798 ms

logo_wpr.png

logo_wpr.png

809 ms

top_menu.png

top_menu.png

813 ms

top_search.png

top_search.png

804 ms

logo_home_top.png

logo_home_top.png

788 ms

novosti_nauki.png

novosti_nauki.png

811 ms

kartinka_dnya.png

kartinka_dnya.png

795 ms

videogrid.png

videogrid.png

778 ms

videoplay_sm.png

videoplay_sm.png

795 ms

email-cht.png

email-cht.png

797 ms

problems.png

problems.png

780 ms

qst_chk.png

qst_chk.png

802 ms

qst_nochk.png

qst_nochk.png

788 ms

events.png

events.png

772 ms

nauchno-populyarnaya_biblioteka.png

nauchno-populyarnaya_biblioteka.png

791 ms

lhcbglg.jpg

lhcbglg.jpg

819 ms

lhc.png

lhc.png

791 ms

bookclub.png

bookclub.png

796 ms

rnd_arr_sprt.png

rnd_arr_sprt.png

779 ms

video.png

video.png

767 ms

videoplay_lg.png

videoplay_lg.png

788 ms

posters.png

posters.png

819 ms

time.png

time.png

776 ms

w_arr.png

w_arr.png

793 ms

trefil.png

trefil.png

776 ms

wvline.png

wvline.png

764 ms

bull_w.png

bull_w.png

789 ms

bull_o.png

bull_o.png

815 ms

catalog.png

catalog.png

775 ms

wall.png

wall.png

792 ms

genbio.png

genbio.png

774 ms

socnets_sprt2.png

socnets_sprt2.png

759 ms

1

1

140 ms

sync_cookie_image_decide

sync_cookie_image_decide

140 ms

sync_cookie_image_decide_secondary

sync_cookie_image_decide_secondary

146 ms

Accessibility Review

zahav.elementy.ru accessibility score

71

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

Links do not have a discernible name

Best Practices

zahav.elementy.ru best practices score

75

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Page has valid source maps

SEO Factors

zahav.elementy.ru SEO score

84

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

    RU

  • Language Claimed

    RU

  • Encoding

    UTF-8

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

zahav.elementy.ru

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