{"id":31074,"date":"2025-10-05T11:41:12","date_gmt":"2025-10-05T08:41:12","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/?p=31074"},"modified":"2025-10-05T11:41:12","modified_gmt":"2025-10-05T08:41:12","slug":"cpu-yogun-gorevleri-web-workers-ile-yonetmek-web-uygulamalarinda-performans-ve-kullanici-deneyimi-icin-kapsamli-bir-yaklasim","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/cpu-yogun-gorevleri-web-workers-ile-yonetmek-web-uygulamalarinda-performans-ve-kullanici-deneyimi-icin-kapsamli-bir-yaklasim\/","title":{"rendered":"CPU-Yo\u011fun G\u00f6revleri Web Workers ile Y\u00f6netmek: Web Uygulamalar\u0131nda Performans ve Kullan\u0131c\u0131 Deneyimi \u0130\u00e7in Kapsaml\u0131 Bir Yakla\u015f\u0131m"},"content":{"rendered":"

<\/p>\n

CPU-Yo\u011fun G\u00f6revleri Web Workers ile Y\u00f6netmek: Web Uygulamalar\u0131nda Performans ve Kullan\u0131c\u0131 Deneyimi \u0130\u00e7in Kapsaml\u0131 Bir Yakla\u015f\u0131m<\/h2>\n

Giri\u015f: Web Uygulamalar\u0131nda Performans\u0131n \u00d6nemi ve CPU-Yo\u011fun G\u00f6revlerin Zorluklar\u0131<\/h3>\n

G\u00fcn\u00fcm\u00fcz\u00fcn modern web uygulamalar\u0131, basit statik sayfalardan karma\u015f\u0131k, dinamik ve etkile\u015fimli platformlara d\u00f6n\u00fc\u015fm\u00fc\u015f durumda. Kullan\u0131c\u0131lar, kulland\u0131klar\u0131 uygulamalar\u0131n h\u0131zl\u0131, ak\u0131c\u0131 ve kesintisiz bir deneyim sunmas\u0131n\u0131 beklerler. Ancak bu beklenti, web geli\u015ftiricileri i\u00e7in \u00f6nemli zorluklar\u0131 da beraberinde getirir. \u00d6zellikle, taray\u0131c\u0131n\u0131n ana i\u015f par\u00e7ac\u0131\u011f\u0131nda (main thread) \u00e7al\u0131\u015fan CPU-yo\u011fun g\u00f6revler, bu beklentileri kar\u015f\u0131laman\u0131n \u00f6n\u00fcndeki en b\u00fcy\u00fck engellerden biridir.<\/p>\n

JavaScript, do\u011fas\u0131 gere\u011fi tek i\u015f par\u00e7ac\u0131kl\u0131 (single-threaded) bir dildir. Bu, bir anda sadece tek bir g\u00f6revin y\u00fcr\u00fct\u00fclebilece\u011fi anlam\u0131na gelir. Kullan\u0131c\u0131 aray\u00fcz\u00fc (UI) g\u00fcncellemeleri, olay dinleyicileri, a\u011f istekleri ve di\u011fer t\u00fcm taray\u0131c\u0131 i\u015flemleri ayn\u0131 ana i\u015f par\u00e7ac\u0131\u011f\u0131nda ger\u00e7ekle\u015fir. E\u011fer bu i\u015f par\u00e7ac\u0131\u011f\u0131 uzun s\u00fcreli veya yo\u011fun bir hesaplama g\u00f6reviyle me\u015fgul olursa, taray\u0131c\u0131 aray\u00fcz\u00fc donar, kullan\u0131c\u0131n\u0131n etkile\u015fimlerine yan\u0131t veremez hale gelir ve bu durum “jank” veya “sayfa yan\u0131t vermiyor” uyar\u0131lar\u0131na yol a\u00e7arak k\u00f6t\u00fc bir kullan\u0131c\u0131 deneyimine neden olur.<\/p>\n

Bu t\u00fcr sorunlar\u0131 a\u015fmak ve web uygulamalar\u0131n\u0131n performans\u0131n\u0131 art\u0131rmak i\u00e7in geli\u015ftiricilerin paralel programlama tekniklerine y\u00f6nelmesi ka\u00e7\u0131n\u0131lmaz hale gelmi\u015ftir. \u0130\u015fte tam bu noktada Web Workers, JavaScript’in tek i\u015f par\u00e7ac\u0131kl\u0131 yap\u0131s\u0131n\u0131 a\u015farak CPU-yo\u011fun g\u00f6revleri ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan izole bir \u015fekilde \u00e7al\u0131\u015ft\u0131rma imkan\u0131 sunan g\u00fc\u00e7l\u00fc bir taray\u0131c\u0131 API’si olarak devreye girer. Bu makale, Web Workers’\u0131n CPU-yo\u011fun g\u00f6revleri nas\u0131l ele ald\u0131\u011f\u0131n\u0131, temelden ileri seviyeye kadar kullan\u0131m\u0131n\u0131, en iyi uygulamalar\u0131 ve ger\u00e7ek d\u00fcnya senaryolar\u0131n\u0131 detayl\u0131 bir \u015fekilde inceleyecektir.<\/p>\n

CPU-Yo\u011fun G\u00f6revleri Anlamak<\/h3>\n

Web Workers’\u0131n neden bu kadar \u00f6nemli oldu\u011funu kavramak i\u00e7in \u00f6ncelikle “CPU-yo\u011fun g\u00f6rev” kavram\u0131n\u0131 derinlemesine anlamak gerekmektedir.<\/p>\n

CPU-Yo\u011fun G\u00f6rev Nedir?<\/h4>\n

CPU-yo\u011fun (CPU-bound) g\u00f6revler, i\u015flemcinin (Central Processing Unit) yo\u011fun hesaplama g\u00fcc\u00fcne ihtiya\u00e7 duyan ve b\u00fcy\u00fck \u00f6l\u00e7\u00fcde i\u015flemci zaman\u0131 t\u00fcketen operasyonlard\u0131r. Bu t\u00fcr g\u00f6revler, genellikle b\u00fcy\u00fck miktarda veriyi i\u015fler, karma\u015f\u0131k algoritmalar \u00e7al\u0131\u015ft\u0131r\u0131r veya tekrarlayan hesaplamalar yapar. CPU-yo\u011fun g\u00f6revler, genellikle belle\u011fe eri\u015fim (memory-bound) veya a\u011f\/disk G\/\u00c7 (I\/O-bound) gibi di\u011fer kaynaklara ba\u011f\u0131ml\u0131 de\u011fildir; ana darbo\u011faz i\u015flemcinin kendisidir. \u00d6rne\u011fin, bir veritaban\u0131ndan veri okumak I\/O-yo\u011fun bir g\u00f6revken, okunan bu veriyi s\u0131ralamak veya \u00fczerinde karma\u015f\u0131k analizler yapmak CPU-yo\u011fun bir g\u00f6rev olabilir.<\/p>\n

Web Uygulamalar\u0131nda S\u0131k Kar\u015f\u0131la\u015f\u0131lan CPU-Yo\u011fun Senaryolar<\/h4>\n

Modern web uygulamalar\u0131nda CPU-yo\u011fun g\u00f6revlere s\u0131k\u00e7a rastlan\u0131r. \u0130\u015fte baz\u0131 \u00f6rnekler:<\/p>\n

* G\u00f6r\u00fcnt\u00fc ve Video \u0130\u015fleme:<\/strong> Kullan\u0131c\u0131 taraf\u0131ndan y\u00fcklenen bir g\u00f6r\u00fcnt\u00fcn\u00fcn boyutunu de\u011fi\u015ftirmek, filtre uygulamak (sepya, bulan\u0131kla\u015ft\u0131rma vb.), renk d\u00fczeltmeleri yapmak veya video karelerini analiz etmek gibi i\u015flemler.
\n* B\u00fcy\u00fck Veri Setlerinin \u0130\u015flenmesi:<\/strong> B\u00fcy\u00fck JSON veya CSV dosyalar\u0131n\u0131 ayr\u0131\u015ft\u0131rmak, devasa dizileri s\u0131ralamak, filtrelemek, gruplamak, istatistiksel analizler yapmak veya karma\u015f\u0131k veri g\u00f6rselle\u015ftirmeleri i\u00e7in \u00f6n i\u015fleme yapmak.
\n* Kriptografik \u0130\u015flemler:<\/strong> Kullan\u0131c\u0131 verilerini istemci taraf\u0131nda \u015fifrelemek, \u015fifresini \u00e7\u00f6zmek, hash fonksiyonlar\u0131 uygulamak veya dijital imzalar olu\u015fturmak gibi g\u00fcvenlik odakl\u0131 hesaplamalar.
\n* Kompleks Matematiksel Hesaplamalar ve Sim\u00fclasyonlar:<\/strong> Finansal modeller, bilimsel sim\u00fclasyonlar, 3D grafiklerin transformasyon matrisleri veya fizik motoru hesaplamalar\u0131 gibi yo\u011fun matematiksel operasyonlar.
\n* Oyun Mant\u0131\u011f\u0131 ve Yapay Zeka:<\/strong> Taray\u0131c\u0131 tabanl\u0131 oyunlarda karakter hareketleri, \u00e7arp\u0131\u015fma alg\u0131lama, d\u00fc\u015fman AI’s\u0131 veya yol bulma algoritmalar\u0131 gibi s\u00fcrekli \u00e7al\u0131\u015fan ve i\u015flemci g\u00fcc\u00fc gerektiren mant\u0131klar.<\/p>\n

Ana \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 \u00dczerindeki Etkileri<\/h4>\n

Bu t\u00fcr CPU-yo\u011fun g\u00f6revler ana i\u015f par\u00e7ac\u0131\u011f\u0131nda \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda, taray\u0131c\u0131n\u0131n t\u00fcm di\u011fer i\u015flerini engeller. Sonu\u00e7lar genellikle \u015funlard\u0131r:<\/p>\n

* Kullan\u0131c\u0131 Aray\u00fcz\u00fc Engellemesi (UI Blocking):<\/strong> Sayfadaki d\u00fc\u011fmeler t\u0131klanamaz hale gelir, metin giri\u015f alanlar\u0131 yan\u0131t vermez, kayd\u0131rma (scrolling) donar veya animasyonlar tak\u0131l\u0131r.
\n* K\u00f6t\u00fc Kullan\u0131c\u0131 Deneyimi:<\/strong> Uygulama “donmu\u015f” veya “\u00e7\u00f6km\u00fc\u015f” gibi hissedilir. Kullan\u0131c\u0131lar sinirlenir ve uygulamay\u0131 terk edebilir.
\n* Taray\u0131c\u0131 Uyar\u0131lar\u0131:<\/strong> Baz\u0131 durumlarda, taray\u0131c\u0131 kullan\u0131c\u0131ya “Sayfa yan\u0131t vermiyor” uyar\u0131s\u0131 g\u00f6stererek sayfay\u0131 kapatma veya bekleme se\u00e7ene\u011fi sunar.
\n* Daha Uzun Y\u00fckleme S\u00fcreleri:<\/strong> Sayfa y\u00fcklenirken arka planda \u00e7al\u0131\u015fan yo\u011fun bir betik, ilk render s\u00fcresini uzatabilir ve alg\u0131lanan performans\u0131 d\u00fc\u015f\u00fcrebilir.<\/p>\n

Bu olumsuz etkiler, Web Workers gibi ara\u00e7lar\u0131 kullanarak CPU-yo\u011fun g\u00f6revleri ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan ay\u0131rman\u0131n ne kadar kritik oldu\u011funu a\u00e7\u0131k\u00e7a ortaya koymaktad\u0131r.<\/p>\n

Web Workers ile Tan\u0131\u015fma: Paralel \u0130\u015flem G\u00fcc\u00fc<\/h3>\n

Web Workers, JavaScript’in tek i\u015f par\u00e7ac\u0131kl\u0131 do\u011fas\u0131n\u0131 a\u015fmak i\u00e7in taray\u0131c\u0131lar taraf\u0131ndan sunulan bir \u00e7\u00f6z\u00fcmd\u00fcr.<\/p>\n

Web Worker Nedir?<\/h4>\n

Web Worker, taray\u0131c\u0131n\u0131n ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan ba\u011f\u0131ms\u0131z, ayr\u0131 bir i\u015f par\u00e7ac\u0131\u011f\u0131nda arka planda JavaScript betikleri \u00e7al\u0131\u015ft\u0131rman\u0131za olanak tan\u0131yan bir API’dir. Bu, ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n kullan\u0131c\u0131 aray\u00fcz\u00fcn\u00fc (UI) ak\u0131c\u0131 ve yan\u0131t verebilir tutarken, yo\u011fun hesaplamalar\u0131n arka planda y\u00fcr\u00fct\u00fclmesine olanak tan\u0131r.<\/p>\n

Web Worker’lar kendi global ba\u011flamlar\u0131na sahiptir (self<\/code> veya this<\/code> ile eri\u015filebilir) ve ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan tamamen izole edilmi\u015flerdir. Bu izolasyonun en \u00f6nemli sonucu, bir Web Worker’\u0131n do\u011frudan DOM’a (Document Object Model) eri\u015fememesidir. Yani, bir worker i\u00e7inden document<\/code> veya window<\/code> gibi nesnelere do\u011frudan m\u00fcdahale edilemez. Bu k\u0131s\u0131tlama, worker’\u0131n UI’y\u0131 engellemesini \u00f6nler ve g\u00fcvenli\u011fi art\u0131r\u0131r.<\/p>\n

Worker ile ana i\u015f par\u00e7ac\u0131\u011f\u0131 aras\u0131ndaki ileti\u015fim, mesajla\u015fma (message passing) mekanizmas\u0131 arac\u0131l\u0131\u011f\u0131yla ger\u00e7ekle\u015fir. Her iki taraf da postMessage()<\/code> metodu ile veri g\u00f6nderir ve onmessage<\/code> olay dinleyicisi ile gelen veriyi al\u0131r.<\/p>\n

Web Worker T\u00fcrleri (K\u0131saca)<\/h4>\n

Web Workers API’si alt\u0131nda birka\u00e7 farkl\u0131 worker t\u00fcr\u00fc bulunur:<\/p>\n

* Dedicated Workers:<\/strong> Bu makalenin odak noktas\u0131d\u0131r. Yaln\u0131zca kendisini olu\u015fturan ana i\u015f par\u00e7ac\u0131\u011f\u0131 (veya ba\u015fka bir worker) ile ileti\u015fim kurabilen, tek bir beti\u011fe adanm\u0131\u015f worker’lard\u0131r. Her new Worker()<\/code> \u00e7a\u011fr\u0131s\u0131 yeni bir Dedicated Worker \u00f6rne\u011fi olu\u015fturur.
\n* Shared Workers:<\/strong> Birden fazla ana i\u015f par\u00e7ac\u0131\u011f\u0131 veya worker taraf\u0131ndan payla\u015f\u0131labilen worker’lard\u0131r. Farkl\u0131 pencereler, sekmeler veya iframe’ler ayn\u0131 Shared Worker \u00f6rne\u011fine ba\u011flanabilir ve onunla ileti\u015fim kurabilir.
\n* Service Workers:<\/strong> \u00c7evrimd\u0131\u015f\u0131 deneyimler, \u00f6nbellekleme ve a\u011f isteklerini ele alma gibi proxy benzeri i\u015flevler i\u00e7in tasarlanm\u0131\u015ft\u0131r. Genellikle push bildirimleri ve arka plan senkronizasyonu i\u00e7in kullan\u0131l\u0131rlar. Konumuz CPU-yo\u011fun g\u00f6revler oldu\u011fu i\u00e7in bu makalede Dedicated Workers’a odaklanaca\u011f\u0131z.<\/p>\n

Web Worker’lar\u0131n Avantajlar\u0131<\/h4>\n

Web Workers kullanman\u0131n temel avantajlar\u0131 \u015funlard\u0131r:<\/p>\n

* Kullan\u0131c\u0131 Aray\u00fcz\u00fcn\u00fcn Ak\u0131c\u0131l\u0131\u011f\u0131n\u0131 Koruma:<\/strong> En \u00f6nemli avantaj, yo\u011fun g\u00f6revler arka planda \u00e7al\u0131\u015f\u0131rken ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n serbest kalmas\u0131 ve UI’n\u0131n ak\u0131c\u0131 kalmas\u0131d\u0131r.
\n* Daha \u0130yi Performans ve Yan\u0131t Verme S\u00fcresi:<\/strong> Uygulama daha h\u0131zl\u0131 ve daha duyarl\u0131 hisseder, bu da kullan\u0131c\u0131 memnuniyetini art\u0131r\u0131r.
\n* Taray\u0131c\u0131 Kaynaklar\u0131n\u0131n Daha Verimli Kullan\u0131m\u0131:<\/strong> Taray\u0131c\u0131, g\u00f6revleri farkl\u0131 i\u015f par\u00e7ac\u0131klar\u0131na da\u011f\u0131tarak genel sistem kaynaklar\u0131n\u0131 daha verimli kullanabilir.
\n* Mod\u00fclerlik ve Kod \u0130zolasyonu:<\/strong> Yo\u011fun hesaplama mant\u0131\u011f\u0131n\u0131 ayr\u0131 bir dosyada tutmak, kod taban\u0131n\u0131 daha d\u00fczenli ve y\u00f6netilebilir hale getirir.<\/p>\n

Web Workers ile CPU-Yo\u011fun G\u00f6revleri Uygulama<\/h3>\n

\u015eimdi Web Workers’\u0131 CPU-yo\u011fun bir g\u00f6revi y\u00f6netmek i\u00e7in nas\u0131l kullanaca\u011f\u0131m\u0131za daha yak\u0131ndan bakal\u0131m.<\/p>\n

Temel Kurulum ve \u0130leti\u015fim Mekanizmas\u0131<\/h4>\n

Bir Web Worker kullanmak i\u00e7in iki ana bile\u015fene ihtiyac\u0131m\u0131z var: ana i\u015f par\u00e7ac\u0131\u011f\u0131nda \u00e7al\u0131\u015fan bir JavaScript dosyas\u0131 (genellikle HTML ile ili\u015fkilendirilen) ve worker’\u0131n kendi JavaScript dosyas\u0131.<\/p>\n

1. Worker Beti\u011fi Olu\u015fturma (worker.js<\/code>):<\/strong>
\n \u00d6ncelikle, arka planda \u00e7al\u0131\u015facak mant\u0131\u011f\u0131 i\u00e7eren ayr\u0131 bir JavaScript dosyas\u0131 olu\u015fturulur. \u00d6rne\u011fin, worker.js<\/code> ad\u0131nda bir dosya. Bu dosya, ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan gelen mesajlar\u0131 dinleyecek ve sonu\u00e7lar\u0131 geri g\u00f6nderecektir.<\/p>\n

\/\/ worker.js\n    self.onmessage = function(event) {\n        const data = event.data;\n        \/\/ CPU-yo\u011fun hesaplama burada yap\u0131l\u0131r\n        let result = 0;\n        for (let i = 0; i < data.iterations; i++) {\n            result += Math.sqrt(i) * Math.sin(i);\n        }\n        self.postMessage({ status: 'completed', result: result });\n    };\n\n    self.onerror = function(error) {\n        console.error('Worker hatas\u0131:', error);\n        self.postMessage({ status: 'error', message: error.message });\n    };<\/code><\/pre>\n
    self<\/code> anahtar kelimesi, worker'\u0131n global kapsam\u0131n\u0131 temsil eder. self.onmessage<\/code> ile ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan gelen mesajlar\u0131 dinleriz. event.data<\/code>, ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan g\u00f6nderilen veriyi i\u00e7erir. Hesaplama tamamland\u0131\u011f\u0131nda, self.postMessage()<\/code> ile sonu\u00e7 ana i\u015f par\u00e7ac\u0131\u011f\u0131na geri g\u00f6nderilir.<\/p>\n
2.  Ana \u0130\u015f Par\u00e7ac\u0131\u011f\u0131nda Worker'\u0131 Ba\u015flatma:<\/strong>
\n    Ana HTML dosyan\u0131zla ili\u015fkili JavaScript dosyas\u0131nda (\u00f6rne\u011fin, main.js<\/code>), worker'\u0131 ba\u015flat\u0131r ve onunla ileti\u015fim kurars\u0131n\u0131z.<\/p>\n
\/\/ main.js\n    const myWorker = new Worker('worker.js'); \/\/ Worker dosyas\u0131n\u0131n yolu\n\n    \/\/ Worker'dan gelen mesajlar\u0131 dinle\n    myWorker.onmessage = function(event) {\n        const response = event.data;\n        if (response.status === 'completed') {\n            console.log('Workerdan gelen sonu\u00e7:', response.result);\n            document.getElementById('status').textContent = 'Hesaplama tamamland\u0131: ' + response.result;\n        } else if (response.status === 'error') {\n            console.error('Worker hatas\u0131:', response.message);\n            document.getElementById('status').textContent = 'Hata olu\u015ftu: ' + response.message;\n        }\n        document.getElementById('startButton').disabled = false;\n    };\n\n    \/\/ Worker'da olu\u015fabilecek hatalar\u0131 dinle\n    myWorker.onerror = function(error) {\n        console.error('Ana i\u015f par\u00e7ac\u0131\u011f\u0131nda worker hatas\u0131:', error);\n        document.getElementById('status').textContent = 'Worker genel hatas\u0131: ' + error.message;\n        document.getElementById('startButton').disabled = false;\n    };\n\n    document.getElementById('startButton').addEventListener('click', function() {\n        document.getElementById('status').textContent = 'Hesaplan\u0131yor...';\n        document.getElementById('startButton').disabled = true;\n        \/\/ Worker'a veri g\u00f6nder\n        myWorker.postMessage({ iterations: 100000000 }); \/\/ \u00d6rne\u011fin 100 milyon iterasyon\n    });<\/code><\/pre>\n
    new Worker('worker.js')<\/code> ile yeni bir worker \u00f6rne\u011fi olu\u015fturulur. myWorker.onmessage<\/code> ile worker'dan gelen mesajlar al\u0131n\u0131r. myWorker.postMessage()<\/code> ile worker'a veri g\u00f6nderilir ve hesaplaman\u0131n ba\u015flat\u0131lmas\u0131 istenir.<\/p>\n
Hata Y\u00f6netimi<\/h4>\n
Web Workers'da hata y\u00f6netimi \u00f6nemlidir. Hem worker beti\u011finin i\u00e7inde hem de ana i\u015f par\u00e7ac\u0131\u011f\u0131nda hatalar\u0131 yakalamak i\u00e7in mekanizmalar bulunur:<\/p>\n
*   Worker \u0130\u00e7inde Hata Yakalama:<\/strong> Worker beti\u011fi i\u00e7inde try...catch<\/code> bloklar\u0131 kullan\u0131larak veya self.onerror<\/code> olay\u0131 dinlenerek worker i\u00e7indeki hatalar ele al\u0131nabilir. self.onerror<\/code> genellikle worker'\u0131n kendisinde meydana gelen \u00e7al\u0131\u015fma zaman\u0131 hatalar\u0131n\u0131 yakalar.
\n*   Ana \u0130\u015f Par\u00e7ac\u0131\u011f\u0131nda Hata Yakalama:<\/strong> Ana i\u015f par\u00e7ac\u0131\u011f\u0131nda worker.onerror<\/code> olay\u0131 dinlenerek worker'da meydana gelen hatalar hakk\u0131nda bilgi al\u0131nabilir. Bu, hatan\u0131n t\u00fcr\u00fc, mesaj\u0131 ve dosya ad\u0131 gibi detaylar\u0131 i\u00e7eren bir ErrorEvent<\/code> nesnesi sa\u011flar.<\/p>\n
Worker'\u0131 Sonland\u0131rma<\/h4>\n
Bir worker i\u015fini tamamlad\u0131\u011f\u0131nda veya art\u0131k ihtiyac\u0131n\u0131z kalmad\u0131\u011f\u0131nda, kaynaklar\u0131 serbest b\u0131rakmak i\u00e7in onu sonland\u0131rmak iyi bir pratiktir. Bu, ana i\u015f par\u00e7ac\u0131\u011f\u0131nda worker.terminate()<\/code> metodu \u00e7a\u011fr\u0131larak yap\u0131l\u0131r:<\/p>\n
\/\/ main.js\n\/\/ ... worker i\u015flemleri bittikten sonra\nmyWorker.terminate();\nconsole.log('Worker sonland\u0131r\u0131ld\u0131.');<\/code><\/pre>\n
terminate()<\/code> \u00e7a\u011fr\u0131ld\u0131\u011f\u0131nda, worker'\u0131n i\u015f par\u00e7ac\u0131\u011f\u0131 hemen durdurulur ve t\u00fcm kaynaklar\u0131 serbest b\u0131rak\u0131l\u0131r. Worker beti\u011fi i\u00e7inde self.close()<\/code> \u00e7a\u011fr\u0131larak da worker kendini sonland\u0131rabilir.<\/p>\n
Geli\u015fmi\u015f Web Worker Teknikleri ve Optimizasyonlar<\/h3>\n
Temel kullan\u0131m\u0131n \u00f6tesinde, Web Workers ile daha verimli ve g\u00fc\u00e7l\u00fc uygulamalar olu\u015fturmak i\u00e7in baz\u0131 geli\u015fmi\u015f teknikler mevcuttur.<\/p>\n
Aktar\u0131labilir Nesneler (Transferable Objects)<\/h4>\n
Web Worker ile ana i\u015f par\u00e7ac\u0131\u011f\u0131 aras\u0131ndaki ileti\u015fimde, postMessage()<\/code> ile g\u00f6nderilen veriler genellikle kopyalan\u0131r. K\u00fc\u00e7\u00fck veriler i\u00e7in bu sorun te\u015fkil etmezken, b\u00fcy\u00fck ArrayBuffer<\/code>'lar veya di\u011fer karma\u015f\u0131k nesneler s\u00f6z konusu oldu\u011funda veri kopyalama i\u015flemi ciddi bir performans darbo\u011faz\u0131 olu\u015fturabilir. Bu durumda, aktar\u0131labilir nesneler (Transferable Objects) devreye girer.<\/p>\n
Aktar\u0131labilir nesneler, verinin kopyalanmas\u0131 yerine do\u011frudan ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan worker'a (veya tersi) \"aktar\u0131lmas\u0131n\u0131\" sa\u011flar. Bu, verinin bellekteki sahipli\u011finin bir i\u015f par\u00e7ac\u0131\u011f\u0131ndan di\u011ferine ge\u00e7mesi anlam\u0131na gelir; veri kopyalanmaz, bu da \"s\u0131f\u0131r-kopyalama\" (zero-copy) transferi olarak bilinir. Veri aktar\u0131ld\u0131ktan sonra, g\u00f6nderen tarafta art\u0131k eri\u015filemez hale gelir.<\/p>\n
Aktar\u0131labilir nesnelere \u00f6rnek olarak ArrayBuffer<\/code>, MessagePort<\/code>, ImageBitmap<\/code> ve OffscreenCanvas<\/code> verilebilir. Kullan\u0131m \u015fekli postMessage()<\/code> metodunun ikinci arg\u00fcman\u0131 olarak bir dizi halinde aktar\u0131lacak nesneleri belirtmektir:<\/p>\n
\/\/ main.js\nconst buffer = new ArrayBuffer(1024  1024 <\/em> 16); \/\/ 16MB'l\u0131k bir buffer\nconst view = new Uint8Array(buffer);\n\/\/ ... buffer'\u0131 doldur ...\n\nmyWorker.postMessage(buffer, [buffer]); \/\/ Buffer'\u0131 worker'a aktar\n\n\/\/ Bu noktadan sonra 'buffer' ana i\u015f par\u00e7ac\u0131\u011f\u0131nda kullan\u0131lamaz hale gelir\n\/\/ console.log(view[0]); \/\/ Hata verecektir veya tan\u0131ms\u0131z olacakt\u0131r<\/code><\/pre>\n
\/\/ worker.js\nself.onmessage = function(event) {\n    const buffer = event.data; \/\/ Aktar\u0131lan buffer\n    const view = new Uint8Array(buffer);\n    console.log('Workerda al\u0131nan buffer boyutu:', view.byteLength);\n    \/\/ ... buffer \u00fczerinde i\u015flem yap ...\n\n    \/\/ \u0130\u015flem bittikten sonra worker'dan ana i\u015f par\u00e7ac\u0131\u011f\u0131na geri aktar\u0131labilir\n    self.postMessage(buffer, [buffer]);\n};<\/code><\/pre>\n
Aktar\u0131labilir nesneler, \u00f6zellikle g\u00f6r\u00fcnt\u00fc i\u015fleme, b\u00fcy\u00fck dosya i\u015fleme veya yo\u011fun grafik uygulamalar\u0131 gibi senaryolarda performans\u0131 dramatik bir \u015fekilde art\u0131rabilir.<\/p>\n
Payla\u015f\u0131ml\u0131 ArrayBuffer ve Atomics (K\u0131saca)<\/h4>\n
Aktar\u0131labilir nesneler verinin sahipli\u011fini bir taraftan di\u011ferine ta\u015f\u0131rken, SharedArrayBuffer<\/code> birden fazla i\u015f par\u00e7ac\u0131\u011f\u0131 (ana i\u015f par\u00e7ac\u0131\u011f\u0131 ve worker'lar veya birden fazla worker) aras\u0131nda ayn\u0131 bellek blo\u011funu do\u011frudan payla\u015fmaya olanak tan\u0131r. Bu, veri kopyalama veya aktarma ihtiyac\u0131n\u0131 tamamen ortadan kald\u0131r\u0131r.<\/p>\n
Ancak, ayn\u0131 belle\u011fe birden fazla i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n e\u015f zamanl\u0131 eri\u015fimi, \"yar\u0131\u015f ko\u015fullar\u0131\" (race conditions) ve veri tutars\u0131zl\u0131\u011f\u0131 gibi karma\u015f\u0131k senkronizasyon sorunlar\u0131na yol a\u00e7abilir. Bu sorunlar\u0131 \u00e7\u00f6zmek i\u00e7in Atomics<\/code> API'si kullan\u0131l\u0131r. Atomics<\/code> API'si, atomik (b\u00f6l\u00fcnemez) i\u015flemler sa\u011flayarak payla\u015f\u0131lan bellek \u00fczerinde g\u00fcvenli ve senkronize eri\u015fim imkan\u0131 sunar.<\/p>\n
SharedArrayBuffer<\/code> ve Atomics<\/code> g\u00fc\u00e7l\u00fc ara\u00e7lar olsa da, kullan\u0131m alanlar\u0131 daha ni\u015f ve karma\u015f\u0131kt\u0131r. Ayr\u0131ca, g\u00fcvenlik endi\u015feleri (Spectre gibi yan kanal sald\u0131r\u0131lar\u0131) nedeniyle taray\u0131c\u0131lar, bu \u00f6zelliklerin kullan\u0131m\u0131 i\u00e7in Cross-Origin-Opener-Policy<\/code> (COOP) ve Cross-Origin-Embedder-Policy<\/code> (COEP) gibi HTTP ba\u015fl\u0131klar\u0131n\u0131n ayarlanmas\u0131n\u0131 zorunlu k\u0131lmaktad\u0131r. Bu, web sunucunuzun do\u011fru yap\u0131land\u0131r\u0131lmas\u0131n\u0131 gerektirir.<\/p>\n
Web Worker K\u00fct\u00fcphaneleri (Comlink gibi)<\/h4>\n
Web Workers ile manuel mesajla\u015fma, \u00f6zellikle karma\u015f\u0131k uygulamalarda, bol miktarda boilerplate koduna ve hata yapmaya a\u00e7\u0131k bir yap\u0131ya yol a\u00e7abilir. Bu sorunu \u00e7\u00f6zmek i\u00e7in Comlink<\/code>, Workerize-loader<\/code> veya Greenlet<\/code> gibi k\u00fct\u00fcphaneler geli\u015ftirilmi\u015ftir.<\/p>\n
Bu k\u00fct\u00fcphaneler, worker ileti\u015fimini uzaktan yordam \u00e7a\u011fr\u0131s\u0131 (RPC - Remote Procedure Call) benzeri bir modelle basitle\u015ftirir. Worker'daki fonksiyonlar\u0131 sanki ana i\u015f par\u00e7ac\u0131\u011f\u0131ndaym\u0131\u015f gibi do\u011frudan \u00e7a\u011f\u0131rabilir, promise tabanl\u0131 bir aray\u00fczle sonu\u00e7lar\u0131 alabilirsiniz. Bu, geli\u015ftirme s\u00fcrecini h\u0131zland\u0131r\u0131r ve kodu daha okunabilir hale getirir.<\/p>\n
\/\/ worker.js (Comlink ile)\nimport { expose } from 'comlink';\n\nconst obj = {\n    heavyComputation(iterations) {\n        let result = 0;\n        for (let i = 0; i < iterations; i++) {\n            result += Math.sqrt(i) * Math.sin(i);\n        }\n        return result;\n    }\n};\n\nexpose(obj);<\/code><\/pre>\n
\/\/ main.js (Comlink ile)\nimport { wrap } from 'comlink';\n\nasync function runWorker() {\n    const worker = new Worker('worker.js');\n    const remote = wrap(worker); \/\/ Worker'daki objeyi sarmala\n\n    console.log('Hesaplan\u0131yor...');\n    const result = await remote.heavyComputation(100000000);\n    console.log('Sonu\u00e7:', result);\n    worker.terminate();\n}\n\nrunWorker();<\/code><\/pre>\n
Mod\u00fcl Worker'lar<\/h4>\n
Geleneksel Web Worker'lar, ES Mod\u00fcllerini do\u011frudan i\u00e7e aktarmaya izin vermez. Ancak, modern taray\u0131c\u0131lar type: 'module'<\/code> se\u00e7ene\u011fiyle Mod\u00fcl Worker'lar\u0131 desteklemektedir. Bu, worker betiklerinin import<\/code> ve export<\/code> ifadelerini kullanarak mod\u00fcler JavaScript kodunu kullanabilece\u011fi anlam\u0131na gelir. Bu, kod organizasyonunu ve ba\u011f\u0131ml\u0131l\u0131k y\u00f6netimini b\u00fcy\u00fck \u00f6l\u00e7\u00fcde iyile\u015ftirir.<\/p>\n
\/\/ main.js\nconst myWorker = new Worker('module-worker.js', { type: 'module' });\n\/\/ ...<\/code><\/pre>\n
\/\/ module-worker.js\nimport { someHelperFunction } from '.\/utils.js'; \/\/ Ba\u015fka bir mod\u00fcl\u00fc i\u00e7e aktarabilir\nself.onmessage = (event) => {\n    const data = event.data;\n    const result = someHelperFunction(data.value);\n    self.postMessage(result);\n};<\/code><\/pre>\n
En \u0130yi Uygulamalar ve Dikkat Edilmesi Gerekenler<\/h3>\n
Web Workers, g\u00fc\u00e7l\u00fc bir ara\u00e7 olsa da, her durumda en iyi \u00e7\u00f6z\u00fcm de\u011fildir ve dikkatli bir \u015fekilde kullan\u0131lmal\u0131d\u0131r.<\/p>\n
Ne Zaman Web Worker Kullanmal\u0131?<\/h4>\n
*   Sadece CPU-Yo\u011fun ve Uzun S\u00fcreli G\u00f6revler \u0130\u00e7in:<\/strong> Web Workers'\u0131n kendisi bir ba\u015flang\u0131\u00e7 ve ileti\u015fim maliyetine sahiptir. Bu nedenle, sadece ger\u00e7ekten CPU-yo\u011fun olan ve ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde kilitleyecek g\u00f6revler i\u00e7in kullan\u0131lmal\u0131d\u0131r. Hafif veya k\u0131sa s\u00fcreli g\u00f6revler i\u00e7in worker kullanmak, ek y\u00fck nedeniyle performans\u0131 d\u00fc\u015f\u00fcrebilir.
\n*   DOM Eri\u015fimi Gerektirmeyen G\u00f6revler \u0130\u00e7in:<\/strong> Worker'lar DOM'a eri\u015femedi\u011fi i\u00e7in, bu t\u00fcr g\u00f6revler do\u011fal olarak worker'lara uygun de\u011fildir.<\/p>\n
G\u00f6rev Gran\u00fclerli\u011fi<\/h4>\n
Worker ile ana i\u015f par\u00e7ac\u0131\u011f\u0131 aras\u0131ndaki mesajla\u015fman\u0131n bir maliyeti vard\u0131r. \u00c7ok say\u0131da k\u00fc\u00e7\u00fck mesaj g\u00f6ndermek yerine, daha b\u00fcy\u00fck veri bloklar\u0131n\u0131 tek seferde g\u00f6nderip i\u015flemek ve sonucu tek bir mesajla geri almak genellikle daha verimlidir. G\u00f6revleri uygun gran\u00fclerlikte (b\u00fcy\u00fckl\u00fckte) b\u00f6lmek \u00f6nemlidir.<\/p>\n
Hata Ay\u0131klama<\/h4>\n
Web Worker'lar\u0131 hata ay\u0131klamak, ana i\u015f par\u00e7ac\u0131\u011f\u0131na g\u00f6re biraz daha karma\u015f\u0131k olabilir. Taray\u0131c\u0131 geli\u015ftirici ara\u00e7lar\u0131 (Chrome DevTools gibi), \u00e7al\u0131\u015fan worker'lar\u0131 ve mesajla\u015fma trafi\u011fini denetlemek i\u00e7in \u00f6zel b\u00f6l\u00fcmler sunar. Worker kodunuzdaki console.log<\/code> ifadeleri de genellikle geli\u015ftirici konsolunda g\u00f6r\u00fcn\u00fcr.<\/p>\n
Kaynak Y\u00f6netimi<\/h4>\n
Gereksiz \u00e7al\u0131\u015fan worker'lar bellek ve CPU kaynaklar\u0131n\u0131 t\u00fcketmeye devam eder. Bir worker i\u015fini bitirdi\u011finde veya art\u0131k ihtiyac\u0131n\u0131z kalmad\u0131\u011f\u0131nda worker.terminate()<\/code> metodu ile onu sonland\u0131rmak \u00f6nemlidir. Bu, bellek s\u0131z\u0131nt\u0131lar\u0131n\u0131 \u00f6nler ve sistem kaynaklar\u0131n\u0131 serbest b\u0131rak\u0131r.<\/p>\n
Taray\u0131c\u0131 Uyumlulu\u011fu<\/h4>\n
Web Worker API'si modern taray\u0131c\u0131larda geni\u015f bir deste\u011fe sahiptir. Ancak, SharedArrayBuffer<\/code> gibi daha yeni veya \u00f6zel \u00f6zellikler i\u00e7in taray\u0131c\u0131 deste\u011fini ve gerekli g\u00fcvenlik ba\u015fl\u0131klar\u0131n\u0131 kontrol etmek \u00f6nemlidir.<\/p>\n
Alternatif Yakla\u015f\u0131mlar (K\u0131saca)<\/h4>\n
Her zaman Web Worker kullanmak zorunda de\u011filsiniz. Daha az kritik veya daha k\u0131sa s\u00fcreli g\u00f6revler i\u00e7in alternatifler \u015funlard\u0131r:<\/p>\n
*   requestIdleCallback<\/code>:<\/strong> Taray\u0131c\u0131 bo\u015fta oldu\u011funda bir fonksiyonu \u00e7al\u0131\u015ft\u0131rman\u0131za olanak tan\u0131r. UI'y\u0131 engellemeden arka plan g\u00f6revlerini y\u00fcr\u00fctmek i\u00e7in kullan\u0131labilir, ancak belirli bir zamanda tamamlanma garantisi yoktur.
\n*   Debouncing\/Throttling:<\/strong> \u00d6zellikle kullan\u0131c\u0131 etkile\u015fimlerine (\u00f6rn. arama kutusu giri\u015fi, pencere boyutland\u0131rma) yan\u0131t olarak tetiklenen olaylar\u0131n s\u0131kl\u0131\u011f\u0131n\u0131 azaltmak i\u00e7in kullan\u0131l\u0131r.
\n*   Asenkron JavaScript (Promises, async\/await):<\/strong> A\u011f istekleri gibi I\/O-yo\u011fun g\u00f6revleri ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 engellemeden y\u00f6netmek i\u00e7in idealdir.<\/p>\n
Ger\u00e7ek D\u00fcnya Kullan\u0131m Senaryolar\u0131<\/h3>\n
Web Workers'\u0131n modern web uygulamalar\u0131nda kullan\u0131ld\u0131\u011f\u0131 baz\u0131 ger\u00e7ek d\u00fcnya senaryolar\u0131:<\/p>\n
*   G\u00f6r\u00fcnt\u00fc ve Video \u0130\u015fleme Uygulamalar\u0131:<\/strong> Kullan\u0131c\u0131lar\u0131n taray\u0131c\u0131da g\u00f6r\u00fcnt\u00fcleri d\u00fczenlemesine, filtre uygulamas\u0131na, boyutland\u0131rmas\u0131na veya video transkodlamas\u0131 yapmas\u0131na olanak tan\u0131yan web tabanl\u0131 foto\u011fraf\/video edit\u00f6rleri.
\n*   B\u00fcy\u00fck Veri Analizi ve G\u00f6rselle\u015ftirme Ara\u00e7lar\u0131:<\/strong> Finansal tablolar, bilimsel veriler veya b\u00fcy\u00fck CSV\/JSON dosyalar\u0131 gibi veri setlerini istemci taraf\u0131nda ayr\u0131\u015ft\u0131rmak, i\u015flemek ve g\u00f6rselle\u015ftirmeye haz\u0131r hale getirmek.
\n*   Kriptografi ve G\u00fcvenlik Odakl\u0131 Uygulamalar:<\/strong> Kullan\u0131c\u0131 verilerini istemci taraf\u0131nda \u015fifreleyen veya \u015fifresini \u00e7\u00f6zen, dijital imzalar olu\u015fturan uygulamalar.
\n*   Web Tabanl\u0131 Oyunlar:<\/strong> Fizik motoru hesaplamalar\u0131, AI mant\u0131\u011f\u0131, yol bulma algoritmalar\u0131 veya karma\u015f\u0131k oyun durumlar\u0131n\u0131n g\u00fcncellenmesi gibi yo\u011fun hesaplamalar\u0131 ana oyun d\u00f6ng\u00fcs\u00fcnden ay\u0131rarak ak\u0131c\u0131 bir deneyim sunmak.
\n*   \u00c7evrimd\u0131\u015f\u0131 Veri Senkronizasyonu:<\/strong> B\u00fcy\u00fck miktarda verinin sunucu ile istemci aras\u0131nda senkronize edilmesi veya istemci taraf\u0131nda veritaban\u0131 (IndexedDB gibi) \u00fczerinde yo\u011fun i\u015flemler yap\u0131lmas\u0131.
\n*   PDF Olu\u015fturma veya \u0130\u015fleme:<\/strong> B\u00fcy\u00fck PDF dosyalar\u0131n\u0131 taray\u0131c\u0131da olu\u015fturmak, de\u011fi\u015ftirmek veya ayr\u0131\u015ft\u0131rmak.<\/p>\n
Sonu\u00e7<\/h3>\n
Web Workers, modern web geli\u015ftirmenin vazge\u00e7ilmez bir par\u00e7as\u0131 haline gelmi\u015ftir. JavaScript'in tek i\u015f par\u00e7ac\u0131kl\u0131 do\u011fas\u0131ndan kaynaklanan performans darbo\u011fazlar\u0131n\u0131 a\u015farak, web uygulamalar\u0131n\u0131n daha ak\u0131c\u0131, daha h\u0131zl\u0131 ve daha yan\u0131t verebilir olmas\u0131n\u0131 sa\u011flarlar. CPU-yo\u011fun g\u00f6revleri ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan izole bir \u015fekilde \u00e7al\u0131\u015ft\u0131rma yetene\u011fi, kullan\u0131c\u0131 aray\u00fcz\u00fcn\u00fcn donmas\u0131n\u0131 engeller ve genel kullan\u0131c\u0131 deneyimini \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirir.<\/p>\n
Temel mesajla\u015fma mekanizmas\u0131ndan aktar\u0131labilir nesneler, payla\u015f\u0131ml\u0131 bellek ve k\u00fct\u00fcphaneler gibi geli\u015fmi\u015f tekniklere kadar Web Workers, geli\u015ftiricilere g\u00fc\u00e7l\u00fc paralel programlama yetenekleri sunar. Ancak, her ara\u00e7ta oldu\u011fu gibi, Web Workers'\u0131n da ne zaman ve nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 bilmek \u00f6nemlidir. G\u00f6rev gran\u00fclerli\u011fi, hata y\u00f6netimi ve kaynaklar\u0131n do\u011fru \u015fekilde sonland\u0131r\u0131lmas\u0131 gibi en iyi uygulamalar, bu teknolojinin potansiyelini tam olarak kullanmak i\u00e7in kritik \u00f6neme sahiptir.<\/p>\n
Web uygulamalar\u0131 daha karma\u015f\u0131k hale geldik\u00e7e ve kullan\u0131c\u0131 beklentileri artt\u0131k\u00e7a, Web Workers gibi teknolojilerin rol\u00fc daha da b\u00fcy\u00fcyecektir. Paralel programlama yeteneklerini stratejik bir \u015fekilde kullanarak, geli\u015ftiriciler sadece performansl\u0131 de\u011fil, ayn\u0131 zamanda kullan\u0131c\u0131lar i\u00e7in keyifli ve ak\u0131c\u0131 deneyimler sunan uygulamalar in\u015fa edebilirler.<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"CPU-Yo\u011fun G\u00f6revleri Web Workers ile Y\u00f6netmek: Web Uygulamalar\u0131nda Performans ve Kullan\u0131c\u0131 Deneyimi \u0130\u00e7in Kapsaml\u0131 Bir Yakla\u015f\u0131m\nGiri\u015f: Web","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-31074","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nCPU-Yo\u011fun G\u00f6revleri Web Workers ile Y\u00f6netmek: Web Uygulamalar\u0131nda Performans ve Kullan\u0131c\u0131 Deneyimi \u0130\u00e7in Kapsaml\u0131 Bir Yakla\u015f\u0131m - 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