{"id":86040,"date":"2020-06-21T01:42:53","date_gmt":"2020-06-20T23:42:53","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/oczenka-vliyaniya-na-proizvoditelnost-populyarnyh-dopolnenij-k-chrome"},"modified":"2020-06-21T01:42:53","modified_gmt":"2020-06-20T23:42:53","slug":"oczenka-vliyaniya-na-proizvoditelnost-populyarnyh-dopolnenij-k-chrome","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/oczenka-vliyaniya-na-proizvoditelnost-populyarnyh-dopolnenij-k-chrome","title":{"rendered":"Procjena utjecaja na performanse popularnih dodataka za Chrome","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Objavljene<\/a><\/noindex> rezultati istra\u017eivanja utjecaja tisu\u0107a najpopularnijih dodataka za Chrome na performanse preglednika. Pokazuje se da neki dodaci mogu zna\u010dajno utjecati na performanse i stvoriti veliku optere\u0107enost sustavu, kao i vi\u0161estruko pove\u0107ati potro\u0161nju memorije. Tijekom testiranja ocjenjivano je optere\u0107enje CPU-a u aktivnom i pozadinskom na\u010dinu rada, potro\u0161nja memorije i utjecaj na brzinu prikazivanja otvorenih stranica. Rezultati su prikazani u dva uzorka koji obuhva\u0107aju 100 i 1000 najpopularnijih dodataka.<\/p>\n

Od 100 najpopularnijih dodataka, najvi\u0161e optere\u0107uju CPU dodatci «Evernote Web Clipper» (4 milijuna korisnika) i «Grammarly» (10 milijuna korisnika), koji uzrokuju gubitak dodatnih 500 ms procesorskog vremena pri otvaranju svake stranice (za usporedbu, otvaranje testne stranice bez dodataka tro\u0161i 40 ms).
\nU op\u0107em smislu, 20 dodataka tro\u0161i vi\u0161e od 100 ms, dok 80 tro\u0161i manje od 100 ms. Od neo\u010dekivanih je otvoreno relativno veliko tro\u0161enje resursa dodatkom Ghostery, koji tro\u0161i 120 ms CPU vremena. Menad\u017eer lozinki LastPass tro\u0161i 241 ms, a Skype 191 ms. Ovi resursi ne uzrokuju prekid renderiranja, ali blokiraju po\u010detak interakcije sa stranicom i utje\u010du na potro\u0161nju energije ure\u0111aja.<\/p>\n

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

U uzorku od 1000 dodataka nalaze se dodaci koji stvaraju znatno ve\u0107e optere\u0107enje:<\/p>\n

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

U testu na ka\u0161njenje prikazivanja stranice dodaci Clever, Grammarly, Cash Back for Shopping, LastPass i AVG usporavali su otvaranje za 150-300 ms, u nekim slu\u010dajevima uzrokuju\u0107i ka\u0161njenja koja su usporediva s prikazom same stranice. Sveukupno, situacija je normalna, jer od 100 dodataka samo 6 dovodi do ka\u0161njenja ve\u0107ih od 100 ms.<\/p>\n

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

Rezultati uzorka od 1000 dodataka:<\/p>\n

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

Pri ocjenjivanju optere\u0107enja CPU-a uzrokovanog izvo\u0111enjem pozadinskih operacija dodatak se pokazao
\nAvira Browser Safety, koja je potro\u0161ila gotovo 3 sekunde CPU vremena, dok su tro\u0161kovi drugih dodataka iznosili najvi\u0161e 200 ms. Budu\u0107i da se pozadinski na\u010din obi\u010dno koristi za obradu mre\u017enih zahtjeva koji se izvr\u0161avaju prilikom u\u010ditavanja stranice, test je ponovljen na stranici apple.com, koja \u0161alje 50 zahtjeva umjesto jednog. Rezultati su se promijenili, a vode\u0107i je postao Ghostery, dok je Avira Browser Safety zauzela 9. mjesto (analiza je pokazala da je optere\u0107enje smanjeno zbog prisutnosti stranice apple.com na bijeloj listi).<\/p>\n

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

Rezultati testova 1000 dodataka:
\n

\"Procjena<\/a><\/noindex><\/center><\/p>\n
  • U testu potro\u0161nje memorije, prvo mjesto zauzima dodatak Avira Browser Safety, s potro\u0161njom memorije od 218 MB (zbog obrade vi\u0161e od 30 tisu\u0107a regularnih izraza, pohranjenih u memoriji). Na drugom i tre\u0107em mjestu nalaze se Adblock Plus i Adblock, koji tro\u0161e ne\u0161to manje od 200 MB. Zatvara posljednjih 20 dodataka prema potro\u0161nji memorije \u2014 uBlock Origin, koji tro\u0161i manje od 100 MB (u usporedbi s drugim blokatorima oglasa, uBlock Origin ima jednu od najni\u017eih potro\u0161nja memorije, pogledajte dolje usporedbu blokatora).\n

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

    20 najlo\u0161ijih rezultata pri testiranju 1000 dodataka:
    \n

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

    Budu\u0107i da korisnici \u010desto pripisuju nisku u\u010dinkovitost i ka\u0161njenja pregledniku, a ne instaliranim dodacima, tvrtka Google po\u010dela<\/a><\/noindex> Eksperimenti s informiranjem o problemati\u010dnim dodacima. U stabilnom izdanju Chromea 83 pojavila se opcija «chrome:\/\/flags\/#extension-checkup», koja uklju\u010duje ispis informativnih poruka o mogu\u0107em utjecaju dodataka na privatnost i performanse. Kada je opcija omogu\u0107ena, na stranici novog taba i u menad\u017eeru dodataka po\u010dinje se prikazivati upozorenje da dodaci mogu uzrokovati zna\u010dajnu potro\u0161nju resursa ili pristupiti osobnim podacima i aktivnostima korisnika.<\/p>\n

    Posebno je provedeno usporedno istra\u017eivanje dodataka za blokiranje reklama i za\u0161titu privatnosti, u kontekstu u\u0161tede resursa blokiranjem vanjskih skripti i reklamnih umetanja. Svi dodaci su osigurali smanjenje optere\u0107enja najmanje tri puta prilikom obrade testnog \u010dlanka s jednog od novinskih portala. Prednost je imao dodatak DuckDuckGo Privacy Essentials, pri \u010demu je optere\u0107enje prilikom otvaranja testne stranice smanjeno s 31 sekunde na 1,6 sekundi CPU vremena zahvaljuju\u0107i smanjenju broja mre\u017enih upita za 95% i veli\u010dine preuzetih podataka za 80%. Sli\u010dan rezultat pokazao je uBlock Origin. <\/p>\n

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

    DuckDuckGo Privacy Essentials i uBlock Origin tako\u0111er su se pokazali najboljima u ocjeni potro\u0161nje resursa tijekom pozadinskih operacija.<\/p>\n

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

    Prilikom testiranja potro\u0161nje memorije, DuckDuckGo Privacy Essentials i uBlock Origin omogu\u0107ili su smanjenje potro\u0161nje memorije s 536 MB prilikom potpune obrade testne stranice na ~140 MB.<\/p>\n

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

    Sli\u010dna ispitivanja provedena su za dodatke za web programere. Optere\u0107enje CPU-a:<\/p>\n

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

    Optere\u0107enje CPU-a tijekom izvo\u0111enja pozadinskih operacija
    \n

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

    Ka\u0161njenje renderiranja:
    \n

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

    Potro\u0161nja memorije:
    \n

    \"Procjena<\/a><\/noindex><\/center><\/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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istra\u017eivanja utjecaja na performanse preglednika tisu\u0107u najpoznatijih.","canonical_url":"https:\/\/prohoster.info\/hr\/blog\/news\/oczenka-vliyaniya-na-proizvoditelnost-populyarnyh-dopolnenij-k-chrome","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hr_HR","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u0446\u0435\u043d\u043a\u0430 \u0432\u043b\u0438\u044f\u043d\u0438\u044f \u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u044b\u0445 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