{"id":54747,"date":"2020-01-03T00:00:00","date_gmt":"2020-01-02T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push"},"modified":"2020-02-18T14:02:48","modified_gmt":"2020-02-18T11:02:48","slug":"sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/news\/sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push","title":{"rendered":"Primerjava zmogljivosti HTTP\/1.1, HTTP\/2 in HTTP\/2 + Server Push","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Objavljene<\/a><\/noindex> Rezultati raziskave zmogljivosti razli\u010dnih metod pridobivanja zbirke virov, pri \u010demer so bili za dostop do stre\u017enika uporabljeni protokoli HTTP\/1.1, HTTP\/2 in HTTP\/2 + Server Push. V raziskavi je bilo tudi ocenjeno vplivanje shranjevanja zahtevanih podatkov v predpomnilnik brskalnika in manipulacije z viri na ravni logike delovanja aplikacije (zdru\u017eevanje virov v enotni JSON-blok).<\/p>\n

Testiranje zmogljivosti izvajanja 25 poizvedb je pokazalo na splo\u0161no predvidljive rezultate \u2014 opazno zaostajanje poizvedbe preko HTTP\/1.1 pri praznem predpomnilniku in prevlado vra\u010dila virov v enem bloku (testi z oznako \u201ecompound\u201c). Zmogljivost brskalnikov Firefox in Chrome je bila pribli\u017eno na isti ravni, vendar prisotnost podatkov v predpomnilniku ni privedla do pri\u010dakovanega pove\u010danja u\u010dinkovitosti.<\/p>\n

\"Primerjava<\/a><\/noindex><\/center><\/p>\n

Vendar pa je pri testu obdelave 500 zahtev izstopilo opazno zaostajanje Chrome-a za Firefoxom pri prenosu velikega \u0161tevila zahtevkov in zaostajanje Firefox-a za Chrome-om pri uporabi mehanizma Server Push ter v situaciji uporabe HTTP\/2, ko je bila ve\u010dina podatkov v predpomnilniku brskalnika. Chrome je pokazal bolj u\u010dinkovito delovanje s predpomnilnikom, medtem ko je Firefox bolje obvladoval zunanje zahtevke.<\/p>\n

\"Primerjava<\/a><\/noindex><\/center><\/p>\n

\"Primerjava<\/a><\/noindex><\/center><\/p>\n

Na podlagi testov smo pri\u0161li do zaklju\u010dka, da HTTP\/2 omogo\u010da dovolj u\u010dinkovito obdelavo posameznih zahtevkov velike zbirke virov. Razlike v zmogljivosti preprostih shem lo\u010dene predaje virov v primerjavi z metodami, pri katerih so viri agregirani v en blok, niso tako bistvene, da bi opravi\u010dile znatno zapletenje logike obdelave na strani aplikacije in stre\u017enika<\/a>. Agregacija ima smisel le v situacijah, ko je zmogljivost najvi\u0161ja prioriteta. Ko je pomembnej\u0161e poenostaviti logiko in uporabni\u0161ki vmesnik, je smiselno uporabiti lo\u010deno obdelavo virov.<\/p>\n

Drugim izhodom je, da brskalni cache pri uporabi HTTP\/2 ne vpliva bistveno na uspe\u0161nost obdelave zahtevkov (popolno izvedbo 501 zahtevka je bilo po\u010dasneje izvesti kot 51 zahtevek pri 90-odstotni napolnjenosti cachea v Firefoxu in 2,3-krat po\u010dasneje v Chromu). Uporaba Server Push ni pokazala pomembnih koristi v Firefoxu, se pa je izkazala za u\u010dinkovito pri nalaganju velikega \u0161tevila virov v Chromu. Avtorji \u0161tudije so prav tako opazili, da optimizacija stre\u017eni\u0161ke strani bolj pomembno vpliva na uspe\u0161nost kot optimizacija izvr\u0161enega klientskega kode v brskalniku.<\/p>\n

<\/a><\/noindex><\/p>\n

Izvor: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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