{"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\/hr\/blog\/news\/sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push","title":{"rendered":"Usporedba performansi HTTP\/1.1, HTTP\/2 i HTTP\/2 + Server Push","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Objavljene<\/a><\/noindex> rezultati prou\u010davanja performansi razli\u010ditih metoda ekstrakcije kolekcije resursa, koriste\u0107i protokole HTTP\/1.1, HTTP\/2 i HTTP\/2 + Server Push za pristup serveru. U istra\u017eivanju je tako\u0111e ocenjeno uticaj na performanse kada se tra\u017eeni podaci nalaze u ke\u0161u pregleda\u010da, kao i manipulacija resursima na nivou aplikacijske logike (spajanje resursa u jedinstveni JSON-blok).<\/p>\n

Testiranje performansi izvr\u0161avanja 25 upita pokazalo je op\u0107enito predvidljive rezultate \u2014 primjetna zastoja u upitu preko HTTP\/1.1 pri praznoj cache i vo\u0111enje isporuke resursa s jednim blokom (testovi s oznakom \u00abcompound\u00bb). Performanse Firefoxa i Chromea bile su otprilike na istoj razini, ali prisutnost podataka u cacheu nije dovela do o\u010dekivanog rasta u\u010dinkovitosti.<\/p>\n

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

Me\u0111utim, u testu obrade 500 zahteva primetno je zaostajanje Chrome-a u odnosu na Firefox prilikom slanja velikog broja zahteva i zaostajanje Firefox-a u odnosu na Chrome kada je primenjen mehanizam Server Push i u situaciji kada se koristi HTTP\/2 sa ve\u0107inom podataka u ke\u0161u pregleda\u010da. Chrome je pokazao efikasniji rad sa ke\u0161em, dok je Firefox efikasnije obra\u0111ivao spolja\u0161nje zahteve.<\/p>\n

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

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

Na osnovu testova donet je zaklju\u010dak da HTTP\/2 omogu\u0107ava prili\u010dno efikasno obradu odvojenih zahteva velike kolekcije resursa. Razlike u performansama jednostavnih shema odvojene isporuke resursa u odnosu na metode u kojima se resursi aggreguju u jedan blok nisu dovoljno zna\u010dajne da bi opravdale slo\u017eenije logike obrade na strani aplikacije i poslu\u017eitelja<\/a>. Agregacija ima smisla samo u situacijama kada je performansa najva\u017enija. Kada je va\u017enije pojednostaviti logiku i imati jednostavan API, ima smisla koristiti odvojenu obradu resursa.<\/p>\n

Drugi zaklju\u010dak je da pregledni\u010dki cache prilikom kori\u0161tenja HTTP\/2 nema zna\u010dajan utjecaj na performanse obrade zahtjeva (cjelokupno izvr\u0161enje 501 zahtjeva bilo je sporije od izvr\u0161enja 51 zahtjeva pri 90% ispunjenosti cachea, svega 1,2 puta u Firefoxu i 2,3 puta u Chromeu). Kori\u0161tenje Server Push-a nije pokazalo zna\u010dajne prednosti u Firefoxu, ali je bilo u\u010dinkovito pri u\u010ditavanju velikog broja resursa u Chromeu. Autori istra\u017eivanja tako\u0111er su primijetili da optimizacija serverske strane ima ve\u0107i utjecaj na performanse nego optimizacija klijentskog koda koji se izvr\u0161ava u pregledniku.<\/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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