{"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\/cs\/blog\/news\/sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push","title":{"rendered":"Srovn\u00e1n\u00ed v\u00fdkonu HTTP\/1.1, HTTP\/2 a HTTP\/2 + Server Push","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byly zve\u0159ejn\u011bny<\/a><\/noindex> v\u00fdsledky zkoum\u00e1n\u00ed v\u00fdkonnosti r\u016fzn\u00fdch metod z\u00edsk\u00e1v\u00e1n\u00ed kolekc\u00ed zdroj\u016f pomoc\u00ed protokol\u016f HTTP\/1.1, HTTP\/2 a HTTP\/2 + Server Push pro komunikaci se serverem. Studie tak\u00e9 hodnotila vliv p\u0159\u00edstupu k po\u017eadovan\u00fdm dat\u016fm z mezipam\u011bti prohl\u00ed\u017ee\u010de a manipulace se zdroji na \u00farovni logiky aplikace (sjednocen\u00ed zdroj\u016f do jednoho JSON bloku).<\/p>\n

Testov\u00e1n\u00ed v\u00fdkonu proveden\u00ed 25 dotaz\u016f vyk\u00e1zalo celkov\u011b p\u0159edv\u00eddateln\u00e9 v\u00fdsledky \u2014 znateln\u00e9 zpo\u017ed\u011bn\u00ed dotazu p\u0159es HTTP\/1.1 p\u0159i pr\u00e1zdn\u00e9m cache a dominanci dod\u00e1v\u00e1n\u00ed zdroj\u016f jedn\u00edm blokem (testy ozna\u010den\u00e9 jako \u201ecompound\u201c). V\u00fdkon Firefoxu a Chromu byl zhruba na stejn\u00e9 \u00farovni, ale p\u0159\u00edtomnost dat v cache nep\u0159inesla o\u010dek\u00e1van\u00fd n\u00e1r\u016fst efektivity.<\/p>\n

\"Srovn\u00e1n\u00ed<\/a><\/noindex><\/center><\/p>\n

Av\u0161ak v testu pro zpracov\u00e1n\u00ed 500 po\u017eadavk\u016f se uk\u00e1zalo v\u00fdrazn\u00e9 zpo\u017ed\u011bn\u00ed Chrome za Firefoxem p\u0159i p\u0159enosu velk\u00e9ho mno\u017estv\u00ed po\u017eadavk\u016f a zpo\u017ed\u011bn\u00ed Firefoxu za Chromem p\u0159i pou\u017eit\u00ed mechanismu Server Push a v situaci pou\u017eit\u00ed HTTP\/2, kdy byla v\u011bt\u0161ina dat v mezipam\u011bti prohl\u00ed\u017ee\u010de. Chrome vykazoval efektivn\u011bj\u0161\u00ed pr\u00e1ci s mezipam\u011bt\u00ed, zat\u00edmco Firefox efektivn\u011bj\u0161\u00ed zpracov\u00e1n\u00ed extern\u00edch po\u017eadavk\u016f.<\/p>\n

\"Srovn\u00e1n\u00ed<\/a><\/noindex><\/center><\/p>\n

\"Srovn\u00e1n\u00ed<\/a><\/noindex><\/center><\/p>\n

Na z\u00e1klad\u011b test\u016f byl u\u010din\u011bn z\u00e1v\u011br, \u017ee HTTP\/2 umo\u017e\u0148uje dostate\u010dn\u011b efektivn\u00ed zpracov\u00e1n\u00ed jednotliv\u00fdch po\u017eadavk\u016f velk\u00e9 kolekce zdroj\u016f. Rozd\u00edly ve v\u00fdkonu jednoduch\u00fdch sch\u00e9mat rozd\u011blen\u00e9ho dod\u00e1n\u00ed zdroj\u016f oproti metod\u00e1m, kter\u00e9 agreguj\u00ed zdroje do jednoho bloku, nejsou natolik v\u00fdznamn\u00e9, aby ospravedlnily v\u00fdrazn\u00e9 zkomplikov\u00e1n\u00ed logiky zpracov\u00e1n\u00ed na stran\u011b aplikace a serveru<\/a>. Agregace m\u00e1 smysl pouze v situac\u00edch, kdy je v\u00fdkon nejvy\u0161\u0161\u00edm prioritou. Kdy\u017e je d\u016fle\u017eit\u011bj\u0161\u00ed zjednodu\u0161en\u00ed logiky a jednoduch\u00e9 API, m\u00e1 smysl pou\u017e\u00edt separ\u00e1tn\u00ed zpracov\u00e1n\u00ed zdroj\u016f.<\/p>\n

Dal\u0161\u00edm z\u00e1v\u011brem je, \u017ee prohl\u00ed\u017ee\u010dov\u00e1 mezipam\u011b\u0165 p\u0159i pou\u017eit\u00ed HTTP\/2 nem\u00e1 v\u00fdznamn\u00fd vliv na v\u00fdkon zpracov\u00e1n\u00ed po\u017eadavk\u016f (\u00fapln\u00e9 zpracov\u00e1n\u00ed 501 po\u017eadavku bylo pomalej\u0161\u00ed ne\u017e zpracov\u00e1n\u00ed 51 po\u017eadavku p\u0159i 90% napln\u011bn\u00ed mezipam\u011bti, a to 1,2kr\u00e1t ve Firefoxu a 2,3kr\u00e1t v Chromu). Pou\u017eit\u00ed Server Push neprok\u00e1zalo \u017e\u00e1dn\u00e9 z\u00e1sadn\u00ed v\u00fdhody ve Firefoxu, ale bylo efektivn\u00ed p\u0159i na\u010d\u00edt\u00e1n\u00ed velk\u00e9ho po\u010dtu zdroj\u016f v Chromu. Auto\u0159i studie tak\u00e9 poznamenali, \u017ee optimalizace serverov\u00e9 \u010d\u00e1sti m\u00e1 mnohem v\u011bt\u0161\u00ed vliv na v\u00fdkon ne\u017e optimalizace vykon\u00e1van\u00e9ho klientsk\u00e9ho k\u00f3du v prohl\u00ed\u017ee\u010di.<\/p>\n

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

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

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