{"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\/da\/blog\/news\/sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push","title":{"rendered":"Sammenligning af ydeevnen for HTTP\/1.1, HTTP\/2 og HTTP\/2 + Server Push","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Publiceret<\/a><\/noindex> resultaterne af en unders\u00f8gelse af ydeevnen for forskellige metoder til at hente ressourcer, ved at bruge protokollerne HTTP\/1.1, HTTP\/2 og HTTP\/2 + Server Push til serverhenvendelser. Unders\u00f8gelsen vurderede ogs\u00e5 indflydelsen p\u00e5 ydeevnen ved at hente data fra browserens cache og manipulation af ressourcer p\u00e5 applikationslogikens niveau (sammenl\u00e6gning af ressourcer til et enkelt JSON-bulk).<\/p>\n

Ydelsespr\u00f8vningen af 25 foresp\u00f8rgsler viste generelt forudsigelige resultater \u2014 en m\u00e6rkbar forsinkelse ved foresp\u00f8rgsler gennem HTTP\/1.1 med en tom cache og en f\u00f8rende ressourceafgivelse som en samlet enhed (test med m\u00e6rket \u00abcompound\u00bb). Ydelsen i Firefox og Chrome var nogenlunde den samme, men tilstedev\u00e6relsen af data i cachen f\u00f8rte ikke til den forventede stigning i effektivitet.<\/p>\n

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

Men i testen med 500 anmodninger viste der sig en markant forsinkelse for Chrome i forhold til Firefox ved h\u00e5ndtering af et stort antal anmodninger, og en forsinkelse for Firefox i forhold til Chrome ved brug af Server Push-mekanismen samt i situationen med HTTP\/2, n\u00e5r st\u00f8rstedelen af dataene er i browserens cache. Chrome viste en mere effektiv h\u00e5ndtering af cachen, mens Firefox var mere effektiv til at behandle eksterne anmodninger.<\/p>\n

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

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

Som f\u00f8lge af testene konkluderes det, at HTTP\/2 tillader en tilstr\u00e6kkelig effektiv h\u00e5ndtering af separate anmodninger for en stor samling af ressourcer. Forskellene i ydeevne mellem enkle ordninger for separat leveringskapacitet og metoder, hvor ressourcerne aggregeres til \u00e9n blok, er ikke s\u00e5 betydelige, at de kan retf\u00e6rdigg\u00f8re en betydelig kompleksitet i behandlingslogikken p\u00e5 applikationssiden, og server<\/a>. Aggregering giver kun mening i situationer, hvor ydeevnen har h\u00f8jeste prioritet. N\u00e5r det er vigtigere at forenkle logikken og have et enkelt API, er det fornuftigt at bruge separat behandling af ressourcer.<\/p>\n

En anden konklusion er, at browsercachen ved brug af HTTP\/2 ikke har en betydelig indflydelse p\u00e5 behandlingen af foresp\u00f8rgsler (den fulde udf\u00f8relse af 501 foresp\u00f8rgsler viste sig at v\u00e6re langsommere end udf\u00f8relsen af 51 foresp\u00f8rgsler med 90% fyldning af cachen, kun 1,2 gange langsommere i Firefox og 2,3 gange langsommere i Chrome). Brugen af Server Push viste ikke v\u00e6sentlige fordele i Firefox, men var effektiv ved indl\u00e6sning af et stort antal ressourcer i Chrome. Forfatterne af unders\u00f8gelsen bem\u00e6rkede ogs\u00e5, at optimering af serverdelen har en mere betydelig indflydelse p\u00e5 ydeevnen end optimering af klientkoden, der k\u00f8rer i browseren.<\/p>\n

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

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

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