{"id":6062,"date":"2019-11-20T13:49:23","date_gmt":"2019-11-20T11:49:23","guid":{"rendered":"https:\/\/igloonet.cz\/blog\/?p=6062"},"modified":"2021-01-15T15:22:17","modified_gmt":"2021-01-15T14:22:17","slug":"zrychlujeme-web-1","status":"publish","type":"post","link":"https:\/\/igloonet.cz\/blog\/zrychlujeme-web-1\/","title":{"rendered":"Zrychlujeme web - Co ovliv\u0148uje rychlost?"},"content":{"rendered":"<div id=\"fb-root\"><\/div>\n<p>Pomal\u00fd web je zabij\u00e1k \u00fasp\u011b\u0161n\u00e9ho byznysu. V\u0161echno se dlouho na\u010d\u00edt\u00e1, z\u00e1kazn\u00edci odch\u00e1z\u00ed p\u0159ed n\u00e1kupem a&nbsp;Google ho penalizuje ve&nbsp;vyhled\u00e1v\u00e1n\u00ed. Net\u00fdk\u00e1 se to n\u00e1hodou i&nbsp;va\u0161ich str\u00e1nek? Porad\u00edme, jak si snadno rychlost zm\u011b\u0159it a&nbsp;vy\u0159e\u0161it nej\u010dast\u011bj\u0161\u00ed probl\u00e9my.<br>\n<!--more--><\/p>\n<p><em><strong>Nebojte se zastaral\u00fdch informac\u00ed, \u010dl\u00e1nek jsme aktualizovali v&nbsp;lednu 2021. Novinky se t\u00fdkaj\u00ed nov\u00fdch metrik Googlu pro m\u011b\u0159en\u00ed rychlost.<\/strong><\/em><\/p>\n<p>Ka\u017ed\u00fd web \u010dasem zest\u00e1rne. Zat\u00edmco p\u0159ed lety bylo 10vte\u0159inov\u00e9 na\u010d\u00edt\u00e1n\u00ed hlavn\u00ed str\u00e1nky pom\u011brn\u011b \u010dast\u00e9, dnes si s&nbsp;t\u00edm rozhodn\u011b nevysta\u010d\u00edte. Z\u00e1kazn\u00edci jsou celkov\u011b \u010d\u00edm d\u00e1l n\u00e1ro\u010dn\u011bj\u0161\u00ed, v\u0161echno cht\u011bj\u00ed hned a&nbsp;zn\u00e1m\u00e9 r\u010den\u00ed, \u017ee&nbsp;\u201e\u010das jsou pen\u00edze\u201c plat\u00ed u&nbsp;web\u016f dvojn\u00e1sob. St\u00e1le tak\u00e9 stoup\u00e1 obliba nakupov\u00e1n\u00ed p\u0159\u00edmo z&nbsp;telefonu, kde je rychlost je\u0161t\u011b d\u016fle\u017eit\u011bj\u0161\u00ed \u2013 mobil nen\u00ed tak v\u00fdkonn\u00fd a&nbsp;m\u00e1 pomalej\u0161\u00ed internet ne\u017e pevn\u00e9 p\u0159ipojen\u00ed. Stru\u010dn\u011b \u0159e\u010deno: pokud rychlost va\u0161eho webu nejde s&nbsp;dobou, \u0161kod\u00edte sv\u00e9mu podnik\u00e1n\u00ed.<\/p>\n<p>V igloonetu jsme ned\u00e1vno dostali za \u00fakol zrychlit web <a href=\"https:\/\/www.doktorkladivo.cz\/\">doktorkladivo.cz<\/a>. Na&nbsp;jeho p\u0159\u00edkladu si v&nbsp; s\u00e9rii \u010dl\u00e1nk\u016f uk\u00e1\u017eeme, co v\u0161echno rychlost ovliv\u0148uje a&nbsp;jak jednotliv\u00e9 \u010d\u00e1sti vylep\u0161it, kdy\u017e nechcete p\u0159episovat cel\u00fd e\u2011shop. Tento prvn\u00ed d\u00edl se v\u011bnuje rychlosti obecn\u011b (pro\u010d je vlastn\u011b tak d\u016fle\u017eit\u00e1) a&nbsp;jej\u00edmu m\u011b\u0159en\u00ed,&nbsp; v&nbsp;dal\u0161\u00edch \u010dl\u00e1nc\u00edch se zam\u011b\u0159\u00edme na:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/igloonet.cz\/blog\/zrychlujeme-web-2\/\">Datovou velikost obr\u00e1zk\u016f a&nbsp;lazyloading;<\/a><\/li>\n<li><a href=\"https:\/\/igloonet.cz\/blog\/zrychlujeme-web-3\/\">Pr\u00e1ci s&nbsp;fonty<\/a><\/li>\n<li><a href=\"https:\/\/igloonet.cz\/blog\/zrychlujeme-web-4\/\">CSS a&nbsp;JavaScripty.<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><\/h2>\n<h2>Pro\u010d \u0159e\u0161it zrychlen\u00ed webu<\/h2>\n<h3><b>Lidsk\u00e1 psychologie<\/b><\/h3>\n<p>Argumenty, \u017ee&nbsp;si lid\u00e9 na&nbsp;na\u010dten\u00ed va\u0161eho skv\u011bl\u00e9ho webu r\u00e1di po\u010dkaj\u00ed jsou nesmysl. Nikdo nerad \u010dek\u00e1, a&nbsp;u&nbsp;z\u00e1kazn\u00edk\u016f to plat\u00ed dvojn\u00e1sob \u2013 internet to jen podtrhl. \u010c\u00edm d\u00e9le se str\u00e1nka na\u010d\u00edt\u00e1, t\u00edm v\u00edce roste riziko odchodu. <a href=\"https:\/\/www.slideshare.net\/devonauerswald\/walmart-pagespeedslide\/46\">Walmart<\/a> t\u0159eba zjistil, \u017ee&nbsp;ka\u017ed\u00e1 vte\u0159ina zrychlen\u00ed zv\u00fd\u0161\u00ed konverzn\u00ed pom\u011br o&nbsp;2&nbsp;% (v\u00edce p\u0159\u00edkladu naleznete na&nbsp;<a href=\"https:\/\/wpostats.com\/\">WPO stats)<\/a>.<\/p>\n<ul>\n<li>Do 100&nbsp;ms bereme reakci webu jako okam\u017eitou;<\/li>\n<li>Do 1&nbsp;s&nbsp;vid\u00edme prodlevu, ale nep\u0159eru\u0161\u00edme \u010dinnost;<\/li>\n<li>Nad 10&nbsp;s&nbsp;ztr\u00e1c\u00edme pozornost a&nbsp;m\u00e1me tendenci za\u010d\u00edt d\u011blat n\u011bco jin\u00e9ho.<\/li>\n<\/ul>\n<div id=\"attachment_6063\" style=\"width: 1010px\" class=\"wp-caption aligncenter\"><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/rychlost-nacitani-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/rychlost-nacitani-300x209.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/rychlost-nacitani.png 1000w\" sizes=\"(min-width: 300px) 1000px, (min-width: 150px) 300px, 150px\" aria-describedby=\"caption-attachment-6063\" class=\"wp-image-6063 size-full\" alt width=\"1000\" height=\"698\"><p id=\"caption-attachment-6063\" class=\"wp-caption-text\">Zdroj: Google\/SOASTA Research, 2017<\/p><\/div>\n<h3><b>Google<\/b><\/h3>\n<p>Mysl\u00edte si, \u017ee&nbsp;rychlost ovliv\u0148uje jen to, jak dlouho se str\u00e1nka na\u010d\u00edt\u00e1? Chyba. S&nbsp;pomal\u00fdm webem kles\u00e1 \u0161ance, \u017ee&nbsp;v\u00e1s z\u00e1kazn\u00edci v\u016fbec najdou. V\u011bt\u0161inu n\u00e1v\u0161t\u011bvnosti k&nbsp;n\u00e1m p\u0159iv\u00e1d\u00ed Google, a&nbsp;pr\u00e1v\u011b rychlost webu je jeden z&nbsp;kl\u00ed\u010dov\u00fdch parametr\u016f, s&nbsp;kter\u00fdm pracuje. Pokud na&nbsp;tom budete l\u00e9pe ne\u017e konkurence, tak:<\/p>\n<ul>\n<li>Va\u0161e reklama v&nbsp;s\u00edti Google Ads <a href=\"https:\/\/adwords.googleblog.com\/2008\/06\/landing-page-load-time-now-affects.html\">bude levn\u011bj\u0161\u00ed a&nbsp;budete m\u00edt lep\u0161\u00ed Quality Score<\/a>.<\/li>\n<li>Ve v\u00fdsledc\u00edch vyhled\u00e1v\u00e1n\u00ed se <a href=\"https:\/\/moz.com\/blog\/how-website-speed-actually-impacts-search-ranking\">budete se zobrazovat na&nbsp;vy\u0161\u0161\u00edch m\u00edstech<\/a>. Kolikr\u00e1t re\u00e1ln\u011b p\u0159ejdete na&nbsp;druhou str\u00e1nku na&nbsp;Googlu? Tam skon\u010dit nechcete.<\/li>\n<li>Od poloviny roku 2018 bere Google v&nbsp;potaz i&nbsp;<a href=\"https:\/\/webmasters.googleblog.com\/2018\/01\/using-page-speed-in-mobile-search.html\">rychlost na&nbsp;telefonech<\/a>. Nem\u00e1te vhodn\u011b ud\u011blan\u00fd web pro mobily? \u0160up s&nbsp;v\u00e1mi na&nbsp;konec \u0159ady.<\/li>\n<\/ul>\n<h3><b>Telefony a&nbsp;mobiln\u00ed s\u00edt\u011b<\/b><\/h3>\n<p>Rychlost mobiln\u00edho internetu na&nbsp;3G a&nbsp;4G se st\u00e1le zvy\u0161uje, ale po\u0159\u00e1d nedosahuje kvalit dom\u00e1c\u00edho p\u0159ipojen\u00ed. D\u016fvodem je vysok\u00e1 latence \u2013 \u010das mezi spojen\u00edm serveru a&nbsp;klienta. V\u017edy proto testujte i&nbsp;mobiln\u00ed 3G rychlost. Po\u010d\u00edta\u010d s&nbsp;pevn\u00fdm p\u0159ipojen\u00edm pomal\u00fd web nepoc\u00edt\u00ed (alespo\u0148 ne tak razantn\u011b), mobiln\u00ed u\u017eivatel na&nbsp;datech ano.<\/p>\n<h2>Nov\u00e9 metriky roku&nbsp;2020<\/h2>\n<p><i><span style=\"font-weight: 400;\">Pozor! V&nbsp;polovin\u011b roku 2020 se zm\u011bnilo hodnocen\u00ed pro v\u00fdpo\u010det rychlosti webu. N\u011bkter\u00e9 metriky v&nbsp;\u010d\u00e1sti \u201eJak rychlost m\u011b\u0159it?\u201c te\u010f maj\u00ed pro celkov\u00e9 sk\u00f3re v\u011bt\u0161\u00ed \u010di men\u0161\u00ed d\u016fle\u017eitost <\/span><\/i><i><span style=\"font-weight: 400;\">\u2013 \u010d\u00edsla tak nemus\u00ed 100% sed\u011bt. Pro celkov\u00fd smysl a&nbsp;zp\u016fsob \u0159e\u0161en\u00ed se v\u0161ak nic nem\u011bn\u00ed. <\/span><\/i><i><span style=\"font-weight: 400;\">Nov\u011b tak\u00e9 p\u0159ibyly Core Web Vitals od&nbsp;Googlu, kter\u00e9 jsem do&nbsp;\u010dl\u00e1nku doplnil.&nbsp;<\/span><\/i><\/p>\n<p>Google v&nbsp;roce 2020 zavedl novou sadu metrik pro m\u011b\u0159en\u00ed rychlosti webu jm\u00e9nem Web Vitals. P\u0159edstav\u00edm v\u00e1m 3&nbsp;nejd\u016fle\u017eit\u011bj\u0161\u00ed, tzv. Core Web Vitals, kter\u00e9 rozhodn\u011b nepodce\u0148te. Jde o&nbsp;LCP, FID a&nbsp;CSL.<\/p>\n<p><a href=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/IWyZijWp3AZ6cXdVDHnYxrVLdcTEQIXaYx8LjKZ2uJxX0ZBiAEmyzUBk78bvt9u2tDHvPWPjElhA1mVvMiaYzfsXOzv7art-V2gp3M0dy9cOiFhNcNKbofzUBE_TJ4juii2ZZVWC.png\"><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/IWyZijWp3AZ6cXdVDHnYxrVLdcTEQIXaYx8LjKZ2uJxX0ZBiAEmyzUBk78bvt9u2tDHvPWPjElhA1mVvMiaYzfsXOzv7art-V2gp3M0dy9cOiFhNcNKbofzUBE_TJ4juii2ZZVWC-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/IWyZijWp3AZ6cXdVDHnYxrVLdcTEQIXaYx8LjKZ2uJxX0ZBiAEmyzUBk78bvt9u2tDHvPWPjElhA1mVvMiaYzfsXOzv7art-V2gp3M0dy9cOiFhNcNKbofzUBE_TJ4juii2ZZVWC-300x185.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/IWyZijWp3AZ6cXdVDHnYxrVLdcTEQIXaYx8LjKZ2uJxX0ZBiAEmyzUBk78bvt9u2tDHvPWPjElhA1mVvMiaYzfsXOzv7art-V2gp3M0dy9cOiFhNcNKbofzUBE_TJ4juii2ZZVWC-1024x633.png 1024w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/IWyZijWp3AZ6cXdVDHnYxrVLdcTEQIXaYx8LjKZ2uJxX0ZBiAEmyzUBk78bvt9u2tDHvPWPjElhA1mVvMiaYzfsXOzv7art-V2gp3M0dy9cOiFhNcNKbofzUBE_TJ4juii2ZZVWC.png 1223w\" sizes=\"(min-width: 1024px) 1223px, (min-width: 300px) 1024px, (min-width: 150px) 300px, 150px\" class=\" wp-image-7032 aligncenter\" alt=\"sch\u00e9ma pro core web vitals\" width=\"497\" height=\"307\"><\/a><\/p>\n<p><strong><span style=\"text-decoration: underline;\">Largest Contentful Paint (LCP) - nejv\u011bt\u0161\u00ed vykreslen\u00ed obsahu<\/span><\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Metrika posuzuje rychlost na\u010d\u00edt\u00e1n\u00ed str\u00e1nky, respektive v\u00fdkon na\u010d\u00edt\u00e1n\u00ed. Je to n\u011bco mezi FCP (Prvn\u00ed vykreslen\u00ed obsahu) a&nbsp;Indexem Rychlosti, o&nbsp;kter\u00e9m p\u00ed\u0161u n\u00ed\u017ee. Od&nbsp;nov\u00e9 metriky si slibuj\u00ed lep\u0161\u00ed a&nbsp;p\u0159esn\u011bj\u0161\u00ed m\u011b\u0159en\u00ed. Podle Googlu by LCP m\u011blo b\u00fdt maxim\u00e1ln\u011b 2.5 sekundy.&nbsp;<\/span><\/p>\n<p><strong><span style=\"text-decoration: underline;\">First Input Delay (FID) - prvn\u00ed ne\u010dinnost procesoru<\/span><\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Tahle metrika popisuje, jak rychle mohou u\u017eivatele na&nbsp;str\u00e1nce prov\u00e1d\u011bt \u00falohy \u2013 tedy kdy za\u010dne web reagovat na&nbsp;tla\u010d\u00edtka a&nbsp;dal\u0161\u00ed prvky. Je velmi podobn\u00e1 TBT (Doba do&nbsp;interaktivity).<\/span><\/p>\n<p><strong><span style=\"text-decoration: underline;\">Cumulative Layout Shift (CLS) - Kumulativn\u00ed posun layoutu<\/span><\/strong><\/p>\n<p><span style=\"font-weight: 400;\">\u00dapln\u011b nov\u00e1 metrika, kter\u00e1 popisuje vizu\u00e1ln\u00ed stabilitu b\u011bhem na\u010d\u00edt\u00e1n\u00ed. \u0158e\u0161\u00ed, jestli se na&nbsp;webu neposunuj\u00ed obr\u00e1zky nebo neposkakuj\u00ed prvky atp. Chcete nap\u0159\u00edklad kliknout na&nbsp;tla\u010d\u00edtko, jen\u017ee web se dona\u010dte a&nbsp;tla\u010d\u00edtko se posune - vy tak necht\u011bn\u011b kliknete na&nbsp;n\u011bco jin\u00e9ho. Velice nep\u0159\u00edjemn\u00e1 v\u011bc.<\/span><\/p>\n<p><a href=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-2.png\"><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-2-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-2-300x162.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-2.png 512w\" sizes=\"(min-width: 300px) 512px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-7033 aligncenter\" alt=\"uk\u00e1zka m\u011b\u0159en\u00ed pomoc\u00ed CLS\" width=\"512\" height=\"277\"><\/a><\/p>\n<p><span style=\"font-weight: 400;\">Google rozli\u0161uje t\u0159i stavy metrik:<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 1rem;\">Good - hodnota je v&nbsp;po\u0159\u00e1dku a&nbsp;vyhovuje krit\u00e9ri\u00edm;<\/span><\/li>\n<li><span style=\"font-size: 1rem;\">Needs Improvements - chce to zlep\u0161en\u00ed;<\/span><\/li>\n<li><span style=\"font-size: 1rem;\">Poor - hodnota je naprosto tragick\u00e1 a&nbsp;chce to urychlenou opravu.&nbsp;<\/span><\/li>\n<\/ul>\n<p><a href=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-1-2.png\"><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-1-2-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-1-2-300x169.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-1-2.png 512w\" sizes=\"(min-width: 300px) 512px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-7034 aligncenter\" alt width=\"512\" height=\"288\"><\/a><\/p>\n<p><span style=\"font-weight: 400;\">Pro zlep\u0161en\u00ed t\u011bchto metrik vydal Google s\u00e9rii \u010dl\u00e1nku, kde podrobn\u011b popisuje, jak sk\u00f3re zlep\u0161it:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"><a href=\"https:\/\/web.dev\/optimize-lcp\/\">Optimalizace LCP<\/a>;<\/span><\/li>\n<li><span style=\"font-weight: 400;\"><a href=\"https:\/\/web.dev\/optimize-fid\/\">Optimalizace FID<\/a>;<\/span><\/li>\n<li><a href=\"https:\/\/web.dev\/optimize-cls\/\"><span style=\"font-weight: 400;\">Optimalizace CLS<\/span><\/a>.<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Google si od&nbsp;Core Web Vitals slibuje stabiln\u011bj\u0161\u00ed a&nbsp;p\u0159edv\u00eddateln\u011bj\u0161\u00ed m\u011b\u0159en\u00ed, metriky by se tak nem\u011bly m\u011bnit \u010dast\u011bji ne\u017e jednou za rok. Z\u00e1rove\u0148 v\u0161ak p\u0159izn\u00e1v\u00e1, \u017ee&nbsp;nejsou \u00fapln\u011b perfektn\u00ed a&nbsp;bude na&nbsp;nich d\u00e1le pracovat.<\/span><\/p>\n<h2>Jak rychlost m\u011b\u0159it?<\/h2>\n<p>Ud\u011bl\u00e1me si jednoduch\u00fd test. Otev\u0159ete si web m\u011bstsk\u00e9 \u010d\u00e1sti <a href=\"http:\/\/www.zidenice.eu\">Brno \u017didenice<\/a>. P\u0159i\u0161lo v\u00e1m na\u010d\u00edt\u00e1n\u00ed webu dlouh\u00e9? Mn\u011b taky. A&nbsp;takhle by to nem\u011blo vypadat. Pokud chcete v\u011bd\u011bt, jak je v\u00e1\u0161 web rychl\u00fd, pou\u017eijte tyto dv\u011b slu\u017eby (pro laickou ve\u0159ejnost doporu\u010duji sp\u00ed\u0161e tu prvn\u00ed, ale zkusit m\u016f\u017eete ob\u011b): <a href=\"https:\/\/developers.google.com\/speed\/pagespeed\/insights\/\">PageSpeed Insights<\/a> a&nbsp;<a href=\"https:\/\/webpagetest.org\/\">WebPageTest<\/a>. M\u011b\u0159te ka\u017edou nejnav\u0161t\u011bvovan\u011bj\u0161\u00ed str\u00e1nku podle va\u0161ich statistik. U&nbsp;Doktora Kladivo to byla domovsk\u00e1 str\u00e1nka, v\u00fdpis produkt\u016f a&nbsp;detail produktu. Pokud jsou pro v\u00e1s v\u00fdsledky m\u011b\u0159en\u00ed \u0161pan\u011blsk\u00e1 vesnice, poj\u010fme si je bl\u00ed\u017ee vysv\u011btlit.<\/p>\n<h3><strong>PageSpeed Insights&nbsp;<\/strong><\/h3>\n<p>Test v\u00e1m vyp\u00ed\u0161e v\u0161e, co m\u00e1te dob\u0159e a&nbsp;\u0161patn\u011b. Neberte to dogmaticky, ale \u010derven\u00e9 polo\u017eky by bylo dobr\u00e9 opravit co nejd\u0159\u00edve. C\u00edlovou metou je celkov\u00e9 sk\u00f3re kolem 80 bod\u016f, o&nbsp;100 se ani nesna\u017ete, dlouhodob\u011b nen\u00ed udr\u017eiteln\u00e9. Zcela v&nbsp;po\u0159\u00e1dku jsou i&nbsp;ni\u017e\u0161\u00ed hodnocen\u00ed (Doktor Kladivo se t\u0159eba pohybuje kolem 55), d\u016fle\u017eit\u00e9 je b\u00fdt rychlej\u0161\u00ed ne\u017e konkurence.<\/p>\n<p>Na PageSpeed Insights je skv\u011bl\u00e9, \u017ee&nbsp;v\u00e1m v&nbsp;\u010d\u00e1sti <b>Data pole<\/b> uk\u00e1\u017eou re\u00e1ln\u00e9 v\u00fdsledky u\u017eivatel\u016f Google Chrome. Nejsp\u00ed\u0161 v\u00e1m budou \u0159\u00edkat, \u017ee&nbsp;jste pomal\u00ed, ale to se zobrazuje skoro v\u0161em :). D\u016fle\u017eit\u011bj\u0161\u00ed jsou barvi\u010dky u&nbsp;<strong>Prvn\u00edho vykreslen\u00ed obsahu<\/strong> a&nbsp;<strong>Prodlevy prvn\u00edho vstupu<\/strong> \u2013 dobr\u00e9 sk\u00f3re je v\u00edce ne\u017e 60&nbsp;% zelen\u00e9. Pokud m\u00e1 v\u00e1\u0161 web malou n\u00e1v\u0161t\u011bvnost, nemus\u00edte m\u00edt v\u00fdsledky Google Chrome u\u017eivatel\u016f k&nbsp;dispozici.<\/p>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/rychlost-webu-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/rychlost-webu-300x75.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/rychlost-webu.png 927w\" sizes=\"(min-width: 300px) 927px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6064 aligncenter\" alt width=\"927\" height=\"233\"><\/p>\n<p>V <b>Laboratorn\u00edch datech<\/b> pak vid\u00edte jednotliv\u00e9 hodnoty, u&nbsp;ka\u017ed\u00e9ho probl\u00e9mu je pops\u00e1no, jak jednotliv\u00e9 chyby odstranit nebo alespo\u0148 zm\u00edrnit.<\/p>\n<p>Jak\u00e9 hodnoty m\u011b\u0159\u00edme?<\/p>\n<ol>\n<li><b>Prvn\u00ed vykreslen\u00ed obsahu<\/b>: kdy se u\u017eivateli poprv\u00e9 zobraz\u00ed n\u011bjak\u00fd text nebo obr\u00e1zek;<\/li>\n<li><b>Prvn\u00ed smyslupln\u00e9 vykreslen\u00ed<\/b>: kdy za\u010dne b\u00fdt viditeln\u00fd prim\u00e1rn\u00ed obsah str\u00e1nky;<\/li>\n<li><b>Index rychlosti<\/b>: kdy se zobraz\u00ed cel\u00e1 obrazovka nad zlomem str\u00e1nky;<\/li>\n<li><b>Prvn\u00ed ne\u010dinnost procesoru<\/b>: kdy p\u0159estane hlavni proces pracovat a&nbsp;za\u010dne zpracov\u00e1vat po\u017eadavky u\u017eivatele? Nej\u010dast\u011bji zobrazen\u00ed webu blokuj\u00ed JavaScripty;<\/li>\n<li><b>Doba do&nbsp;interaktivity<\/b>: kdy za\u010dne b\u00fdt str\u00e1nka pln\u011b interaktivn\u00ed? Hodnota bude bl\u00edzko p\u0159edchoz\u00edmu bodu, op\u011bt to \u010dasto blokuj\u00ed JavaScripty;<\/li>\n<li><b>Odhadovan\u00e1 latence vstupu<\/b>: prodleva mezi vstupem a&nbsp;v\u00fdstupem u\u017eivatele;<\/li>\n<li><b>Prvn\u00ed byte<\/b>: doba, po kter\u00e9 v\u00e1m server ode\u0161le prvn\u00ed byte. Z\u00e1le\u017eitost backendu. Zobraz\u00ed se v\u00e1m v&nbsp;detailech, jen kdy\u017e ho m\u00e1te nad doporu\u010denou velikost. Ide\u00e1ln\u00ed je kolem 500&nbsp;ms.<\/li>\n<\/ol>\n<p>PageSpeed Insights se nedostanou do&nbsp;v\u0161ech \u010d\u00e1st\u00ed webu. Na&nbsp;zbytek doporu\u010duju pou\u017e\u00edt integrovan\u00fd n\u00e1stroj v&nbsp;Google Chrome s&nbsp;n\u00e1zvem <strong>Lighthouse<\/strong>, vyvol\u00e1te ho kl\u00e1vesou F12 a&nbsp;kliknut\u00edm na&nbsp;posledn\u00ed z\u00e1lo\u017eku Audits. Testujte v&nbsp;anonymn\u00ed re\u017eimu, v\u00fdsledek nebude ovlivn\u011bn\u00fd va\u0161imi pluginy.<\/p>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/audit-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/audit-300x234.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/audit.png 543w\" sizes=\"(min-width: 300px) 543px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6065 aligncenter\" alt width=\"543\" height=\"423\"><\/p>\n<p><span style=\"font-weight: 400;\">Pomoc\u00ed tohoto n\u00e1stroje zm\u011b\u0159\u00edte i&nbsp;Core Web Vitals. Jen pozor, p\u0159id\u00e1v\u00e1 se k&nbsp;nim i&nbsp;metrika FCP, kter\u00e1 do&nbsp;rodiny Web Vitals nepat\u0159\u00ed. Jej\u00ed hodnota tak nem\u00e1 \u017e\u00e1dn\u00fd vliv na&nbsp;to, jestli str\u00e1nka pro\u0161la nebo nepro\u0161la. Na&nbsp;obr\u00e1zku nepro\u0161la kv\u016fli&nbsp;LCP.<\/span><\/p>\n<p><a href=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed.png\"><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-300x104.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed.png 512w\" sizes=\"(min-width: 300px) 512px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-7035 aligncenter\" alt=\"uk\u00e1zkov\u00e9 m\u011b\u0159en\u00ed core web vitals\" width=\"512\" height=\"177\"><\/a><\/p>\n<h3><strong>WebPageTest<\/strong><\/h3>\n<p>WebPageTest je mnohem pokro\u010dilej\u0161\u00ed, ale m\u00e9n\u011b u\u017eivatelsk\u00fd p\u0159\u00edv\u011btiv\u00fd. \u010clov\u011bk u\u017e mus\u00ed v\u011bd\u011bt, na&nbsp;co se d\u00edvat. V\u00fdhoda je, \u017ee&nbsp;web m\u016f\u017eeme otestovat na&nbsp;r\u016fzn\u00fdch prohl\u00ed\u017ee\u010d\u00edch a&nbsp;lokalit\u00e1ch, ale testy jsou mnohem pomalej\u0161\u00ed (z\u00e1le\u017e\u00ed, jakou vlnu po\u017eadavku chytneme p\u0159ed sebou). M\u011b\u0159te nejl\u00e9pe na&nbsp;rychlosti 3G Fast a&nbsp;emulov\u00e1n\u00edm mobiln\u00edho prohl\u00ed\u017ee\u010de \u2013 naleznete to v&nbsp;pokro\u010dil\u00e9m nastaven\u00ed v&nbsp;z\u00e1lo\u017ece <strong>Chromium<\/strong>, kde vyberte i&nbsp;n\u011bjak\u00fd star\u0161\u00ed telefon (nap\u0159\u00edklad Nexus 5). Pro\u010d? V\u011bt\u0161ina lidi m\u00e1 levn\u011bj\u0161\u00ed a&nbsp;pomalej\u0161\u00ed telefony. Pokud zrychl\u00edte pomal\u00e9 telefony, automaticky t\u00edm zrychl\u00edte i&nbsp;modern\u00ed iPhone. Probl\u00e9my nav\u00edc v\u00edce vyniknou, p\u016flsekundov\u00e1 prodleva na&nbsp;PC m\u016f\u017ee na&nbsp;telefonu znamenat i&nbsp;n\u011bkolik vte\u0159in.<\/p>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/WebPageTest-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/WebPageTest-300x224.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/WebPageTest-1024x766.png 1024w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/WebPageTest.png 1223w\" sizes=\"(min-width: 1024px) 1223px, (min-width: 300px) 1024px, (min-width: 150px) 300px, 150px\" class=\"aligncenter wp-image-6066 size-full\" alt width=\"1223\" height=\"915\"><\/p>\n<p>Po dokon\u010den\u00ed testu m\u00e1te naho\u0159e 6&nbsp;barevn\u00fdch ok\u00fdnek s&nbsp;hodnocen\u00edm A&nbsp;a\u017e F. Nejl\u00e9pe byste se m\u011bli dr\u017eet samoz\u0159ejm\u011b A. My jich m\u00e1me jen 5, proto\u017ee nepou\u017e\u00edv\u00e1me CDN.<\/p>\n<p>N\u00ed\u017ee m\u00e1te <strong>Performance results<\/strong>. Nejv\u00edce v\u00e1s zaj\u00edm\u00e1 speed index, co\u017e je zobrazen\u00ed konkr\u00e9tn\u00ed str\u00e1nky v&nbsp;dan\u00e9m prohl\u00ed\u017ee\u010di, velikosti okna a&nbsp;rychlosti internetu. \u010c\u00edm je ni\u017e\u0161\u00ed, t\u00edm l\u00e9pe. Dobr\u00e9 sk\u00f3re je kolem 2&nbsp;sekund.<\/p>\n<p><strong>Filmov\u00fd p\u00e1s<\/strong> (filmstrip view) je dobr\u00fd na&nbsp;ov\u011b\u0159en\u00ed toho, jak prob\u00edh\u00e1 vykreslov\u00e1n\u00ed a&nbsp;kdy se u\u017eivateli zobraz\u00ed prvn\u00ed sn\u00edmek. Jde o&nbsp;mnohem lep\u0161\u00ed zdroj dat ne\u017e strojov\u011b vypo\u010d\u00edtan\u00fd start render, kter\u00fd hodnotu \u010dasto p\u0159e\u017eene nebo&nbsp;sn\u00ed\u017e\u00ed.<\/p>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/filmstrip-1-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/filmstrip-1-300x157.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/filmstrip-1-1024x535.png 1024w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/filmstrip-1.png 1042w\" sizes=\"(min-width: 1024px) 1042px, (min-width: 300px) 1024px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6074 aligncenter\" alt width=\"1042\" height=\"544\"><\/p>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-1-1-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-1-1-300x44.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-1-1-1024x150.png 1024w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/unnamed-1-1.png 1299w\" sizes=\"(min-width: 1024px) 1299px, (min-width: 300px) 1024px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6076 aligncenter\" alt width=\"1299\" height=\"190\"><\/p>\n<p>Ve <strong>Waterfall pohledu<\/strong> vid\u00edme, jak se na\u010d\u00edtaj\u00ed jednotliv\u00e9 prvky. Snadno odhal\u00edte ty, kter\u00e9 v\u00e1m cel\u00fd proces zbyte\u010dn\u011b blokuj\u00ed.<\/p>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/waterfall-view-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/waterfall-view-300x208.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/waterfall-view-1024x710.png 1024w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/waterfall-view.png 1178w\" sizes=\"(min-width: 1024px) 1178px, (min-width: 300px) 1024px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6069 aligncenter\" alt width=\"1178\" height=\"817\"><\/p>\n<p>Pozor si dejte i&nbsp;na&nbsp;marke\u0165\u00e1ky, kte\u0159\u00ed v\u00e1m mohou zpomalit web pomoc\u00ed Google Tag Manageru a&nbsp;bambilionu JavaScript\u016f t\u0159et\u00edch stran. Live Chat opravdu nepot\u0159ebujete spou\u0161t\u011bt v&nbsp;prvn\u00edch 10 vte\u0159in\u00e1ch.<\/p>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/tag-manager-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/tag-manager-300x169.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/tag-manager-1024x576.png 1024w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/tag-manager.png 1600w\" sizes=\"(min-width: 1024px) 1600px, (min-width: 300px) 1024px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6070 aligncenter\" alt width=\"1600\" height=\"900\"><\/p>\n<p>&nbsp;<\/p>\n<h2>Co (ne)zrychl\u00ed web<\/h2>\n<p>Kolem zrychlen\u00ed webu koluje cel\u00e1 \u0159ada f\u00e1m. Vypsal jsem \u201etipy\u201c, o&nbsp;kter\u00fdch si spousta lid\u00ed mysl\u00ed, \u017ee&nbsp;v\u0161e vy\u0159e\u0161\u00ed. Neud\u011blaj\u00ed p\u0159itom skoro&nbsp;nic.<\/p>\n<ol>\n<li>Zrychl\u00edm \u010das na\u010dten\u00ed (kompletn\u00ed load time) \u2013 pro Google jde o&nbsp;m\u00e1lo podstatn\u00fd \u00fadaj. D\u016fle\u017eit\u011bj\u0161\u00ed je, jak se web na\u010d\u00edt\u00e1 v&nbsp;pr\u016fb\u011bhu na\u010d\u00edt\u00e1n\u00ed.<\/li>\n<li>M\u016fj server je pomal\u00fd, tak zrychl\u00edm backend \u2013 backend se na&nbsp;rychlosti webu samoz\u0159ejm\u011b pod\u00edl\u00ed, ale v\u011bt\u0161\u00ed paseku na&nbsp;webu v\u00e1m ud\u011bl\u00e1 frontend a&nbsp;jeho JavaScripty.<\/li>\n<li>Z Analytics m\u00e1m hezk\u00e1 \u010d\u00edsla na\u010dten\u00ed webu a&nbsp;dal\u0161\u00edch \u00fadaj\u016f, v\u0161e je tedy v&nbsp;po\u0159\u00e1dku \u2013 p\u011bkn\u00e1 \u010d\u00edsla m\u00e1te, ale nereflektuj\u00ed kompletn\u00ed web. Jedn\u00e1 se pouze o&nbsp;backend a&nbsp;na\u010dten\u00ed skript\u016f.<\/li>\n<li>Zmen\u0161\u00edm datov\u011b velikost str\u00e1nky \u2013 pom\u016f\u017eete si, ale jen tro\u0161ku.<\/li>\n<li>\u010c\u00edm m\u00e9n\u011b dotaz\u016f na&nbsp;server, t\u00edm p\u0159ece l\u00e9pe \u2013 to platilo u&nbsp;protokolu HTTP\/1. P\u0159ejd\u011bte na&nbsp;HTTP\/2, kde z\u00edsk\u00e1te mo\u017enost paraleln\u00edho zpracov\u00e1n\u00ed a&nbsp;dal\u0161\u00ed \u010d\u00e1ry. M\u00e9 \u0159e\u0161en\u00ed v&nbsp;dal\u0161\u00edch \u010dl\u00e1nc\u00edch <b>HTTP\/2 vy\u017eaduj\u00ed<\/b>, na&nbsp;HTTP\/1 byste si moc nepomohli a&nbsp;mo\u017en\u00e1 si i&nbsp;dost ubl\u00ed\u017eili.<\/li>\n<li>M\u00e1m e\u2011shop a&nbsp;hodn\u011b obr\u00e1zku, sta\u010d\u00ed je zmen\u0161it \u2013 ano i&nbsp;ne. Obr\u00e1zky nejsou prioritn\u00ed, tud\u00ed\u017e neblokuj\u00ed stahov\u00e1n\u00ed a&nbsp;jejich zmen\u0161en\u00edm si pom\u016f\u017eete a\u017e v&nbsp;pozd\u011bj\u0161\u00ed \u010d\u00e1sti na\u010d\u00edt\u00e1n\u00ed. Nasa\u010fte lazyloading, t\u00edm si pom\u016f\u017eete nejv\u00edce a&nbsp;hned. Pak vy\u0159e\u0161te zbytek.<\/li>\n<\/ol>\n<h2>V\u00fdsledky zrychlov\u00e1n\u00ed<\/h2>\n<p>Dost\u00e1v\u00e1me se k&nbsp;z\u00e1v\u011bru prvn\u00edho d\u00edlu. Pro \u00faplnost p\u0159id\u00e1v\u00e1m na\u0161e statistiky z&nbsp;Doktora Kladivo. V\u0161eobecn\u011b jsme desktopovou verzi zrychlili o&nbsp;<b>83&nbsp;% <\/b>a&nbsp;sn\u00ed\u017eili index rychlosti se&nbsp; z&nbsp;<b>11,4 sekund<\/b> na&nbsp;<b>1,3 sekund.<\/b> Mobiln\u00ed verzi jsme zrychlili v\u0161eobecn\u011b o&nbsp;<b>40&nbsp;% <\/b>a&nbsp;index rychlosti sn\u00ed\u017eili z&nbsp;<b>8,1 sekundy<\/b> na&nbsp;<b>4,8 sekundy. <\/b>Pokud se v&nbsp;tabulk\u00e1ch ztr\u00e1c\u00edte, po\u0161lete n\u00e1\u0161 \u010dl\u00e1nek sv\u00e9mu frontend v\u00fdvoj\u00e1\u0159i.<\/p>\n<p>N\u00ed\u017ee uveden\u00e9 v\u00fdsledky jsou v\u017edy pr\u016fm\u011brem t\u0159\u00ed m\u011b\u0159en\u00ed.<\/p>\n<p><b>Desktop \u2013 homepage<\/b><\/p>\n<table style=\"width: 100%;\">\n<tbody>\n<tr>\n<td style=\"text-align: left;\">M\u011b\u0159en\u00e1 statistika<\/td>\n<td style=\"text-align: right;\">P\u0159ed<\/td>\n<td style=\"text-align: right;\">Po<\/td>\n<td style=\"text-align: right;\">Zrychlen\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed vykreslen\u00ed obsahu<\/td>\n<td style=\"text-align: right;\">3,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 88&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Index rychlosti<\/td>\n<td style=\"text-align: right;\">11,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 88&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Doba do&nbsp;interaktivity<\/td>\n<td style=\"text-align: right;\">15,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">2,7&nbsp;s<\/td>\n<td style=\"text-align: right;\">&nbsp;o&nbsp;82&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed smyslupln\u00e9 vykreslen\u00ed<\/td>\n<td style=\"text-align: right;\">5,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 93&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Prvn\u00ed ne\u010dinnost procesoru<\/td>\n<td style=\"text-align: right;\">14,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,9&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 87&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Maxim\u00e1ln\u00ed potenci\u00e1ln\u00ed prodleva prvn\u00edho vstupu<\/td>\n<td style=\"text-align: right;\">&nbsp;0,9&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 87&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed byte<\/td>\n<td style=\"text-align: right;\">0,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 76&nbsp;%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p><b>Mobil \u2013 homepage<\/b><\/p>\n<table style=\"width: 100%;\">\n<tbody>\n<tr>\n<td style=\"text-align: left;\">M\u011b\u0159en\u00e1 statistika<\/td>\n<td style=\"text-align: right;\">P\u0159ed<\/td>\n<td style=\"text-align: right;\">Po<\/td>\n<td style=\"text-align: right;\">Zrychlen\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed vykreslen\u00ed obsahu<\/td>\n<td style=\"text-align: right;\">2,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 46&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Index rychlosti<\/td>\n<td style=\"text-align: right;\">8,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">4,8&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 60&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Doba do&nbsp;interaktivity<\/td>\n<td style=\"text-align: right;\">11,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">11,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 5&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed smyslupln\u00e9 vykreslen\u00ed<\/td>\n<td style=\"text-align: right;\">3,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">&nbsp;o&nbsp;62&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed ne\u010dinnost procesoru<\/td>\n<td style=\"text-align: right;\">10,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">9,0&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 15&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Maxim\u00e1ln\u00ed potenci\u00e1ln\u00ed prodleva prvn\u00edho vstupu<\/td>\n<td style=\"text-align: right;\">0,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,5&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 24&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed byte<\/td>\n<td style=\"text-align: right;\">0,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 76&nbsp;%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-domovsk\u00e9-str\u00e1nky-p\u0159ed-a-po-zrychlen\u00ed-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-domovsk\u00e9-str\u00e1nky-p\u0159ed-a-po-zrychlen\u00ed-300x186.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-domovsk\u00e9-str\u00e1nky-p\u0159ed-a-po-zrychlen\u00ed.png 600w\" sizes=\"(min-width: 300px) 600px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6115 aligncenter\" alt width=\"600\" height=\"371\"><\/p>\n<p><b>Desktop \u2013 list produkt\u016f<\/b><b><br>\n<\/b><\/p>\n<table style=\"width: 100%;\">\n<tbody>\n<tr>\n<td>M\u011b\u0159en\u00e1 statistika<\/td>\n<td style=\"text-align: right;\">P\u0159ed<\/td>\n<td style=\"text-align: right;\">Po<\/td>\n<td style=\"text-align: right;\">Zrychlen\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed vykreslen\u00ed obsahu<\/td>\n<td style=\"text-align: right;\">2,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 82&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Index rychlosti<\/td>\n<td style=\"text-align: right;\">11,2&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 88&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Doba do&nbsp;interaktivity<\/td>\n<td style=\"text-align: right;\">15,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,8&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 88&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed smyslupln\u00e9 vykreslen\u00ed<\/td>\n<td style=\"text-align: right;\">5,2&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 92&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed ne\u010dinnost procesoru<\/td>\n<td style=\"text-align: right;\">15,0&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,9&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 87&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Maxim\u00e1ln\u00ed potenci\u00e1ln\u00ed prodleva prvn\u00edho vstupu<\/td>\n<td style=\"text-align: right;\">1,2&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,2&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 85&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed byte<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,5&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 60&nbsp;%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p><b>Mobil \u2013 list produkt\u016f<\/b><b><br>\n<\/b><\/p>\n<table style=\"width: 100%;\">\n<tbody>\n<tr>\n<td>M\u011b\u0159en\u00e1 statistika<\/td>\n<td style=\"text-align: right;\">P\u0159ed<\/td>\n<td style=\"text-align: right;\">Po<\/td>\n<td style=\"text-align: right;\">Zrychlen\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed vykreslen\u00ed obsahu<\/td>\n<td style=\"text-align: right;\">2,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,2&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 50&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Index rychlosti<\/td>\n<td style=\"text-align: right;\">8,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">4,5&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 45&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Doba do&nbsp;interaktivity<\/td>\n<td style=\"text-align: right;\">12,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">11,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 10&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed smyslupln\u00e9 vykreslen\u00ed<\/td>\n<td style=\"text-align: right;\">3,4&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,2&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 65&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed ne\u010dinnost procesoru<\/td>\n<td style=\"text-align: right;\">11,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">9,5&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 15&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Maxim\u00e1ln\u00ed potenci\u00e1ln\u00ed prodleva prvn\u00edho vstupu<\/td>\n<td style=\"text-align: right;\">0,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,5&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 15&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed byte<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,5&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 60&nbsp;%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-listu-produktu-p\u0159ed-a-po-zrychlen\u00ed-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-listu-produktu-p\u0159ed-a-po-zrychlen\u00ed-300x186.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-listu-produktu-p\u0159ed-a-po-zrychlen\u00ed.png 600w\" sizes=\"(min-width: 300px) 600px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6118 aligncenter\" alt width=\"600\" height=\"371\"><\/p>\n<p>&nbsp;<\/p>\n<p><b>Desktop \u2013 detail produktu<\/b><\/p>\n<table style=\"width: 100%;\">\n<tbody>\n<tr>\n<td>M\u011b\u0159en\u00e1 statistika<\/td>\n<td style=\"text-align: right;\">P\u0159ed<\/td>\n<td style=\"text-align: right;\">Po<\/td>\n<td style=\"text-align: right;\">Zrychlen\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed vykreslen\u00ed obsahu<\/td>\n<td style=\"text-align: right;\">3,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 90&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Index rychlosti<\/td>\n<td style=\"text-align: right;\">24,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 95&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Doba do&nbsp;interaktivity<\/td>\n<td style=\"text-align: right;\">18,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,8&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 90&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed smyslupln\u00e9 vykreslen\u00ed<\/td>\n<td style=\"text-align: right;\">4,5&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 93&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Prvn\u00ed ne\u010dinnost procesoru<\/td>\n<td style=\"text-align: right;\">18,0&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,9&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 89&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Maxim\u00e1ln\u00ed potenci\u00e1ln\u00ed prodleva prvn\u00edho vstupu<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 92&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed byte<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,5&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 60&nbsp;%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p><b>Mobil \u2013 detail produktu&nbsp;<\/b><\/p>\n<table style=\"width: 100%;\">\n<tbody>\n<tr>\n<td>M\u011b\u0159en\u00e1 statistika<\/td>\n<td style=\"text-align: right;\">P\u0159ed<\/td>\n<td style=\"text-align: right;\">Po<\/td>\n<td style=\"text-align: right;\">Zrychlen\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed vykreslen\u00ed obsahu<\/td>\n<td style=\"text-align: right;\">2,2&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,9&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 14&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Index rychlosti<\/td>\n<td style=\"text-align: right;\">7,6&nbsp;s<\/td>\n<td style=\"text-align: right;\">3,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 57&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Doba do&nbsp;interaktivity<\/td>\n<td style=\"text-align: right;\">11,9&nbsp;s<\/td>\n<td style=\"text-align: right;\">11,0&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 8&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed smyslupln\u00e9 vykreslen\u00ed<\/td>\n<td style=\"text-align: right;\">3,0&nbsp;s<\/td>\n<td style=\"text-align: right;\">1,9&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 37&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Prvn\u00ed ne\u010dinnost procesoru<\/td>\n<td style=\"text-align: right;\">10,1&nbsp;s<\/td>\n<td style=\"text-align: right;\">9,2&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 9&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td>Maxim\u00e1ln\u00ed potenci\u00e1ln\u00ed prodleva prvn\u00edho vstupu<\/td>\n<td style=\"text-align: right;\">0,52&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,49&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 6&nbsp;%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prvn\u00ed byte<\/td>\n<td style=\"text-align: right;\">1,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">0,3&nbsp;s<\/td>\n<td style=\"text-align: right;\">o 77&nbsp;%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img srcset=\"https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-detailu-produktu-p\u0159ed-a-po-zrychlen\u00ed-150x150.png 150w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-detailu-produktu-p\u0159ed-a-po-zrychlen\u00ed-300x186.png 300w, https:\/\/igloonet.cz\/blog\/wp-content\/uploads\/2019\/11\/Doba-na\u010d\u00edt\u00e1n\u00ed-detailu-produktu-p\u0159ed-a-po-zrychlen\u00ed.png 600w\" sizes=\"(min-width: 300px) 600px, (min-width: 150px) 300px, 150px\" class=\"size-full wp-image-6117 aligncenter\" alt width=\"600\" height=\"371\"><\/p>\n<p>Pro\u010d m\u00e1 mobiln\u00ed verze v\u0161eobecn\u011b men\u0161\u00ed zrychlen\u00ed? Klient mobiln\u00ed web u\u017e v&nbsp;minulosti n\u011bjak\u00fdm zp\u016fsobem optimalizoval a&nbsp;n\u011bkolik n\u00e1mi vylep\u0161en\u00fdch prvk\u016f z&nbsp;desktopov\u00e9 verze v&nbsp;n\u011bm v\u016fbec nen\u00ed. Dal\u0161\u00edm d\u016fvodem je, \u017ee&nbsp;v&nbsp;dob\u011b psan\u00ed je\u0161t\u011b nem\u00e1me v\u0161e hotov\u00e9 \u2013 chyb\u00ed n\u011bkter\u00e9 optimaliza\u010dn\u00ed prvky ze strany backendu (nap\u0159. WebP) a&nbsp;p\u0159eps\u00e1n\u00ed na\u0161ich JavaScript\u016f. V&nbsp;dal\u0161\u00edch d\u00edlech si pov\u00edme, jak jsme jednotliv\u00e9 zm\u011bny provedli. <a href=\"https:\/\/igloonet.cz\/blog\/zrychlujeme-web-2\/\">Vrhn\u011bte se na&nbsp;pokra\u010dov\u00e1n\u00ed.<\/a><br>\n\n\t\t<script>var e = {type:\"double\", dml:\"83447\", fc1:\"8acfbf451846c695\",fc2:\"8a0a176f151cb319\", dt:\"13486\" , returnUrl:\"https:\/\/igloonet.cz\/blog\" , autosuggest:true, fromEmail:\"marketing@igloonet.cz\", fromName:\"igloonet \"};window.e74a58fdj=e;s=document.getElementsByTagName(\"script\")[0];qc=document.createElement(\"script\");qc.src=\"\/\/static.mailkit.eu\/_system\/subform.js\";qc.setAttribute(\"dvar\", \"e74a58fdj\");s.parentNode.insertBefore(qc,s);<\/script>\t\t\n\t\t<\/p><div class=\"mailkit_instance\">\n\t\t\t<form method=\"POST\" data-id=\"e74a58fdj\" class=\"newsletter-form\" id=\"newsletter-form\">\n\t\t\t    <div class=\"hr-wrap\"><hr><\/div>\n\t            <h2>Chyst\u00e1me pokra\u010dov\u00e1n\u00ed<\/h2>\n\t            <p>Nenechte si uj\u00edt pokra\u010dov\u00e1n\u00ed \u010dl\u00e1nku a&nbsp;dal\u0161\u00ed novinky a&nbsp;tipy. Zadejte sv\u016fj e-mail, a&nbsp;u\u017e v\u00e1m nic neunikne.<\/p>\n\t\t\t\t\n\t\t\t\t<div class=\"newsletter-form__email\">\n\t                <div class=\"newsletter-form__input-group\">\n\t                    <label for=\"first_name_inline\">K\u0159estn\u00ed jm\u00e9no<\/label><input type=\"text\" name=\"first_name\" id=\"first_name_inline\" value required>\n\t                <\/div>\n\t\t\t\t    \n\t\t\t\t    <div class=\"newsletter-form__input-group\">\n\t\t\t\t\t    <label for=\"email_inline\">E-mail<\/label><input type=\"text\" name=\"email\" id=\"email_inline\" value required>\n\t\t\t\t    <\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div class=\"mailkit_submit newsletter-form__button--wrapper\">\n\t\t\t\t    <button type=\"submit\" class=\"newsletter-form__button\" id=\"newsletter-form__button\">P\u0159ihl\u00e1sit<\/button>\n\t\t\t\t    <input type=\"hidden\" name=\"_do\" value=\"newsletterForm-submit\">\n\t\t\t\t<\/div>\n                                <div><br>Odesl\u00e1n\u00edm formul\u00e1\u0159e souhlas\u00edte se <a href=\"\/ochrana-osobnich-udaju\">zpracov\u00e1n\u00edm osobn\u00edch \u00fadaj\u016f<\/a>.<\/div>\n\t\t\t<\/form>\n\t\t<\/div>\n\t\t\n\t\t<div class=\"newsletter-form__alert\" id=\"newsletter-form__alert\">\n\t\t\tByl v\u00e1m odesl\u00e1n potvrzovac\u00ed e-mail.&nbsp;<\/div>\n\t\n","protected":false},"excerpt":{"rendered":"<p>Pomal\u00fd web je zabij\u00e1k \u00fasp\u011b\u0161n\u00e9ho byznysu. V\u0161echno se dlouho na\u010d\u00edt\u00e1, z\u00e1kazn\u00edci odch\u00e1z\u00ed p\u0159ed n\u00e1kupem a&nbsp;Google ho penalizuje ve&nbsp;vyhled\u00e1v\u00e1n\u00ed. Net\u00fdk\u00e1 se to n\u00e1hodou i&nbsp;va\u0161ich str\u00e1nek? Porad\u00edme, jak si snadno rychlost zm\u011b\u0159it a&nbsp;vy\u0159e\u0161it nej\u010dast\u011bj\u0161\u00ed probl\u00e9my.<\/p>\n","protected":false},"author":42,"featured_media":6726,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[71],"tags":[246],"class_list":["post-6062","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vyvoj","tag-zrychleni-webu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Zrychlujeme web - Co ovliv\u0148uje rychlost? | igloonet blog<\/title>\n<meta name=\"description\" content=\"Pomal\u00fd web je zabij\u00e1k \u00fasp\u011b\u0161n\u00e9ho byznysu. V\u0161echno se dlouho na\u010d\u00edt\u00e1 a z\u00e1kazn\u00edci odch\u00e1z\u00ed p\u0159ed n\u00e1kupem. 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