JavaScript d\u00fcnyas\u0131, y\u0131llar i\u00e7inde tek i\u015f par\u00e7ac\u0131kl\u0131 do\u011fas\u0131ndan s\u0131yr\u0131larak e\u015fzamanl\u0131 ve paralel i\u015flem yeteneklerini geli\u015ftiren bir\u00e7ok yenili\u011fe sahne oldu. G\u00fcn\u00fcm\u00fcz\u00fcn karma\u015f\u0131k web uygulamalar\u0131, y\u00fcksek performansl\u0131 algoritmalar ve ger\u00e7ek zamanl\u0131 etkile\u015fimler i\u00e7in bu yeteneklere her zamankinden daha fazla ihtiya\u00e7 duyuyor. Peki, 2025 itibar\u0131yla modern JavaScript e\u015fzamanl\u0131l\u0131\u011f\u0131 ne anlama geliyor ve geli\u015ftiriciler bu g\u00fc\u00e7l\u00fc ara\u00e7lar\u0131 nas\u0131l etkin bir \u015fekilde kullanabilir? Bu makale, JavaScript’in e\u015fzamanl\u0131l\u0131k evrimini, mevcut teknolojileri ve gelecekteki potansiyelini derinlemesine inceleyecek.<\/p>\n
\n Uzman \u0130pucu: Web uygulamalar\u0131n\u0131zda kullan\u0131c\u0131 deneyimini radikal bir \u015fekilde iyile\u015ftirmek i\u00e7in ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 me\u015fgul eden g\u00f6revleri Web Workers’a devredin. Bu teknikle UI donmalar\u0131n\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde azaltabilirsiniz!\n <\/div>\n
Neden JavaScript E\u015fzamanl\u0131l\u0131\u011f\u0131na \u0130htiya\u00e7 Duyar\u0131z? Temel Sorunlar Nelerdir?<\/h2>\n JavaScript, \u00f6z\u00fcnde tek i\u015f par\u00e7ac\u0131kl\u0131 (single-threaded) bir dil olarak tasarlanm\u0131\u015ft\u0131r. Bu, bir zaman diliminde yaln\u0131zca tek bir g\u00f6revin y\u00fcr\u00fct\u00fcld\u00fc\u011f\u00fc anlam\u0131na gelir. Taray\u0131c\u0131 ortam\u0131nda, bu i\u015f par\u00e7ac\u0131\u011f\u0131 genellikle “ana i\u015f par\u00e7ac\u0131\u011f\u0131” (main thread) olarak adland\u0131r\u0131l\u0131r ve hem kullan\u0131c\u0131 aray\u00fcz\u00fcn\u00fc (UI) render etmekten hem de t\u00fcm JavaScript kodunu \u00e7al\u0131\u015ft\u0131rmaktan sorumludur. \u0130\u015fte bu noktada temel bir problem ortaya \u00e7\u0131kar: E\u011fer uzun s\u00fcren veya yo\u011fun hesaplama gerektiren bir JavaScript g\u00f6revi ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 me\u015fgul ederse, kullan\u0131c\u0131 aray\u00fcz\u00fc donar, butonlar t\u0131klanmaz, animasyonlar durur ve kullan\u0131c\u0131 deneyimi ciddi \u015fekilde k\u00f6t\u00fcle\u015fir. Modern web uygulamalar\u0131, bu t\u00fcr performans darbo\u011fazlar\u0131n\u0131 a\u015fmak zorundad\u0131r.<\/p>\n
\u00d6rne\u011fin, b\u00fcy\u00fck bir veri setini i\u015fleyen bir algoritma \u00e7al\u0131\u015ft\u0131rd\u0131\u011f\u0131n\u0131z\u0131 veya karma\u015f\u0131k bir g\u00f6r\u00fcnt\u00fc manip\u00fclasyonu yapt\u0131\u011f\u0131n\u0131z\u0131 hayal edin. Bu i\u015flemler saniyeler hatta daha uzun s\u00fcrebilir. Ana i\u015f par\u00e7ac\u0131\u011f\u0131 bu g\u00f6revi tamamlarken, taray\u0131c\u0131 sayfay\u0131 g\u00fcncelleyemez, scroll hareketlerine yan\u0131t veremez veya herhangi bir kullan\u0131c\u0131 girdisini i\u015fleyemez. Bu durum, kullan\u0131c\u0131n\u0131n uygulamadan tamamen kopmas\u0131na ve k\u00f6t\u00fc bir izlenim edinmesine yol a\u00e7ar. Geli\u015ftiriciler olarak amac\u0131m\u0131z, kullan\u0131c\u0131lar\u0131n ak\u0131c\u0131 ve h\u0131zl\u0131 bir deneyim ya\u015famas\u0131n\u0131 sa\u011flamakt\u0131r. Bu amaca ula\u015fmak i\u00e7in, JavaScript’in temel tek i\u015f par\u00e7ac\u0131kl\u0131 yap\u0131s\u0131n\u0131 korurken, baz\u0131 g\u00f6revleri ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n d\u0131\u015f\u0131nda, paralel olarak y\u00fcr\u00fctmenin yollar\u0131n\u0131 bulmam\u0131z gerekmektedir. \u0130\u015fte tam da bu noktada modern e\u015fzamanl\u0131l\u0131k API’leri devreye girer. Bu API’ler, uzun s\u00fcren i\u015flemleri farkl\u0131 i\u015f par\u00e7ac\u0131klar\u0131na ta\u015f\u0131yarak ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n her zaman yan\u0131t verebilir durumda kalmas\u0131n\u0131 sa\u011flar. Dolay\u0131s\u0131yla, e\u015fzamanl\u0131l\u0131k, kullan\u0131c\u0131 deneyimini iyile\u015ftirmenin yan\u0131 s\u0131ra, \u00e7ok daha karma\u015f\u0131k ve performansl\u0131 uygulamalar geli\u015ftirmemizin de \u00f6n\u00fcn\u00fc a\u00e7ar.<\/p>\n
E\u015fzamanl\u0131l\u0131k kavram\u0131, yaln\u0131zca taray\u0131c\u0131 ortam\u0131yla s\u0131n\u0131rl\u0131 de\u011fildir. Node.js gibi sunucu taraf\u0131 JavaScript ortamlar\u0131nda da yo\u011fun I\/O i\u015flemleri veya CPU-yo\u011fun g\u00f6revler i\u00e7in benzer ihtiya\u00e7lar ortaya \u00e7\u0131kar. Node.js’in olay d\u00f6ng\u00fcs\u00fc (event loop) modeli, I\/O i\u015flemlerini asenkron olarak y\u00f6neterek y\u00fcksek verimlilik sa\u011flasa da, CPU-yo\u011fun g\u00f6revler yine de i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 engelleyebilir. Bu nedenle, hem taray\u0131c\u0131 hem de sunucu taraf\u0131nda paralel i\u015flem yetenekleri, modern JavaScript geli\u015ftirmenin vazge\u00e7ilmez bir par\u00e7as\u0131 haline gelmi\u015ftir. Bu sayede, uygulamalar\u0131m\u0131z daha \u00f6l\u00e7eklenebilir, daha performansl\u0131 ve daha kararl\u0131 hale gelir. \u00d6zetle, e\u015fzamanl\u0131l\u0131k, JavaScript’in performans s\u0131n\u0131rlar\u0131n\u0131 zorlamak ve kullan\u0131c\u0131ya kesintisiz bir deneyim sunmak i\u00e7in kritik bir ara\u00e7t\u0131r.<\/p>\n
JavaScript’in E\u015fzamanl\u0131l\u0131k Temelleri: Olay D\u00f6ng\u00fcs\u00fc, Promise’ler ve Async\/Await Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/h2>\n Modern JavaScript e\u015fzamanl\u0131l\u0131k ara\u00e7lar\u0131na dalmadan \u00f6nce, dilin temel e\u015fzamanl\u0131l\u0131k mekanizmalar\u0131n\u0131 anlamak hayati \u00f6neme sahiptir: Olay D\u00f6ng\u00fcs\u00fc (Event Loop), Promise’ler ve Async\/Await. Bunlar, JavaScript’in asenkron i\u015flemleri tek i\u015f par\u00e7ac\u0131kl\u0131 bir ortamda nas\u0131l y\u00f6netti\u011finin belkemi\u011fidir. Olay d\u00f6ng\u00fcs\u00fc, taray\u0131c\u0131 veya Node.js ortam\u0131nda JavaScript kodunun y\u00fcr\u00fct\u00fclme \u015feklini organize eden bir mekanizmad\u0131r. JavaScript motoru, kodlar\u0131 ana i\u015f par\u00e7ac\u0131\u011f\u0131nda \u00e7al\u0131\u015ft\u0131r\u0131rken, asenkron i\u015flemler (\u00f6rne\u011fin, a\u011f istekleri, zamanlay\u0131c\u0131lar, kullan\u0131c\u0131 olaylar\u0131) tamamland\u0131\u011f\u0131nda geri \u00e7a\u011f\u0131rma (callback) fonksiyonlar\u0131n\u0131 bir s\u0131raya, yani “g\u00f6rev kuyru\u011funa” (task queue veya callback queue) yerle\u015ftirir. Olay d\u00f6ng\u00fcs\u00fc s\u00fcrekli olarak bu kuyru\u011fu kontrol eder ve ana i\u015f par\u00e7ac\u0131\u011f\u0131 bo\u015fald\u0131\u011f\u0131nda, kuyruktaki bir g\u00f6revi al\u0131p y\u00fcr\u00fct\u00fcr. Bu yap\u0131 sayesinde, uzun s\u00fcren bir a\u011f iste\u011fi bile ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 bloke etmez; istek arka planda devam ederken ana i\u015f par\u00e7ac\u0131\u011f\u0131 ba\u015fka i\u015fleri yapmaya devam edebilir.<\/p>\n
Promise’ler, asenkron i\u015flemlerin daha temiz ve y\u00f6netilebilir bir \u015fekilde ele al\u0131nmas\u0131n\u0131 sa\u011flayan \u00f6nemli bir yap\u0131d\u0131r. Bir Promise, hen\u00fcz tamamlanmam\u0131\u015f ancak gelecekte bir de\u011fere d\u00f6n\u00fc\u015fecek veya bir hata f\u0131rlatacak bir asenkron i\u015flemin nihai sonucunu temsil eden bir nesnedir. Promise’ler \u00fc\u00e7 durumda olabilir: pending<\/code> (beklemede), fulfilled<\/code> (ba\u015far\u0131l\u0131) veya rejected<\/code> (ba\u015far\u0131s\u0131z). Promise’ler, i\u00e7 i\u00e7e callback’lerin neden oldu\u011fu “callback cehennemi” (callback hell) sorununu \u00e7\u00f6zerek kodun okunabilirli\u011fini ve bak\u0131m\u0131n\u0131 ciddi \u015fekilde kolayla\u015ft\u0131rm\u0131\u015ft\u0131r. \u00d6rne\u011fin, bir API \u00e7a\u011fr\u0131s\u0131 yapt\u0131\u011f\u0131n\u0131zda, d\u00f6nd\u00fcr\u00fclen Promise’i .then()<\/code> metoduyla ba\u015far\u0131l\u0131 sonu\u00e7lar i\u00e7in ve .catch()<\/code> metoduyla hatalar i\u00e7in i\u015fleyebilirsiniz. Bu zincirleme yap\u0131, asenkron i\u015flem ak\u0131\u015flar\u0131n\u0131 ad\u0131m ad\u0131m takip etmeyi m\u00fcmk\u00fcn k\u0131lar.<\/p>\nPromise’lerin \u00fczerine in\u015fa edilen Async\/Await s\u00f6zdizimi, asenkron kodu senkron koda benzer \u015fekilde yazmam\u0131z\u0131 sa\u011flayarak okunabilirli\u011fi daha da art\u0131rm\u0131\u015ft\u0131r. async<\/code> anahtar kelimesiyle i\u015faretlenmi\u015f bir fonksiyon, her zaman bir Promise d\u00f6nd\u00fcr\u00fcr. Bu fonksiyonun i\u00e7inde, await<\/code> anahtar kelimesini kullanarak bir Promise’in \u00e7\u00f6z\u00fclmesini bekleyebiliriz. await<\/code> anahtar kelimesi, Promise \u00e7\u00f6z\u00fclene kadar fonksiyonun y\u00fcr\u00fct\u00fclmesini duraklat\u0131r, ancak bu duraklama ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 bloke etmez. Olay d\u00f6ng\u00fcs\u00fc, bu s\u0131rada di\u011fer g\u00f6revleri y\u00fcr\u00fctmeye devam eder. Promise \u00e7\u00f6z\u00fcld\u00fc\u011f\u00fcnde, async<\/code> fonksiyon kald\u0131\u011f\u0131 yerden devam eder. Bu sayede, hata y\u00f6netimi de try...catch<\/code> bloklar\u0131 ile senkron koddaki gibi yap\u0131labilir. \u00d6rne\u011fin, bir veritaban\u0131 sorgusu veya bir dosya okuma i\u015flemi, await<\/code> ile bekletilerek kodun daha s\u0131ral\u0131 g\u00f6r\u00fcnmesi sa\u011flan\u0131r.<\/p>\n\nasync function veriGetir() {\n try {\n const response = await fetch('https:\/\/api.example.com\/data');\n if (!response.ok) {\n throw new Error(HTTP Hata kodu: ${response.status}<\/code>);\n }\n const data = await response.json();\n console.log('Veri ba\u015far\u0131yla al\u0131nd\u0131:', data);\n return data;\n } catch (error) {\n console.error('Veri \u00e7ekme hatas\u0131:', error);\n throw error; \/\/ Hatay\u0131 daha \u00fcst seviyeye ta\u015f\u0131\n }\n}\n\n\/\/ Veriyi kullanma\nveriGetir()\n .then(data => console.log('\u0130\u015flenen veri:', data))\n .catch(error => console.error('Genel hata yakaland\u0131:', error));\n <\/pre>\n<\/code><\/p>\n
Bu yap\u0131lar, JavaScript'in modern e\u015fzamanl\u0131l\u0131k stratejilerinin temelini olu\u015fturur. Ancak, bu mekanizmalar hala tek bir i\u015f par\u00e7ac\u0131\u011f\u0131nda \u00e7al\u0131\u015f\u0131r ve CPU-yo\u011fun i\u015flemleri paralel olarak y\u00fcr\u00fctme yetene\u011finden yoksundur. \u0130\u015fte bu noktada Web Workers, SharedArrayBuffer ve di\u011fer ileri d\u00fczey API'ler devreye girerek ger\u00e7ek paralelizm imkanlar\u0131 sunar. Dolay\u0131s\u0131yla, bu temel mekanizmalar\u0131 sa\u011flam bir \u015fekilde kavramak, \u00e7ok i\u015f par\u00e7ac\u0131kl\u0131 JavaScript d\u00fcnyas\u0131na ad\u0131m atmak i\u00e7in ilk ve en \u00f6nemli ad\u0131md\u0131r.<\/p>\n
Web Workers Nedir ve A\u011f\u0131r \u0130\u015flemler Nas\u0131l Paralel Hale Getirilir?<\/h2>\n Web Workers, JavaScript'in tek i\u015f par\u00e7ac\u0131kl\u0131 do\u011fas\u0131n\u0131n getirdi\u011fi s\u0131n\u0131rlamalar\u0131 a\u015fmak i\u00e7in tasarlanm\u0131\u015f, ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan ba\u011f\u0131ms\u0131z olarak \u00e7al\u0131\u015fan komut dosyalar\u0131d\u0131r. Bir Web Worker ba\u015flatt\u0131\u011f\u0131n\u0131zda, taray\u0131c\u0131 ayr\u0131 bir i\u015f par\u00e7ac\u0131\u011f\u0131 olu\u015fturur ve bu i\u015f par\u00e7ac\u0131\u011f\u0131nda worker script'iniz y\u00fcr\u00fct\u00fcl\u00fcr. Bu, ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n kullan\u0131c\u0131 aray\u00fcz\u00fcn\u00fc g\u00fcncel tutmaya devam ederken, CPU-yo\u011fun hesaplamalar\u0131 veya uzun s\u00fcren i\u015flemleri worker'a devrederek uygulaman\u0131z\u0131n ak\u0131c\u0131l\u0131\u011f\u0131n\u0131 korumas\u0131n\u0131 sa\u011flar. Worker'lar ana i\u015f par\u00e7ac\u0131\u011f\u0131na DOM'a eri\u015femezler; bu, onlar\u0131n yal\u0131t\u0131lm\u0131\u015f bir ortamda \u00e7al\u0131\u015ft\u0131\u011f\u0131 anlam\u0131na gelir. \u0130leti\u015fim, mesajla\u015fma (postMessage()<\/code> ve onmessage<\/code> olay dinleyicileri) yoluyla ger\u00e7ekle\u015fir.<\/p>\nWeb Worker Olu\u015fturma ve Kullanma Ad\u0131mlar\u0131:<\/h3>\n\nWorker Script'ini Haz\u0131rla:<\/strong> Ayr\u0131 bir JavaScript dosyas\u0131 olu\u015fturun (\u00f6rne\u011fin, worker.js<\/code>) ve i\u00e7inde worker'\u0131n yapaca\u011f\u0131 i\u015fi tan\u0131mlay\u0131n.<\/li>\nAna \u0130\u015f Par\u00e7ac\u0131\u011f\u0131ndan Worker'\u0131 Ba\u015flat:<\/strong> Ana beti\u011finizde new Worker('worker.js')<\/code> ile bir worker \u00f6rne\u011fi olu\u015fturun.<\/li>\nMesaj G\u00f6nder ve Dinle:<\/strong> worker.postMessage(data)<\/code> ile worker'a veri g\u00f6nderin ve worker.onmessage<\/code> ile worker'dan gelen yan\u0131tlar\u0131 dinleyin. Ayn\u0131 \u015fekilde worker i\u00e7inde de self.postMessage(result)<\/code> ile ana i\u015f par\u00e7ac\u0131\u011f\u0131na veri g\u00f6nderilir ve self.onmessage<\/code> ile ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan gelen mesajlar dinlenir.<\/li>\n<\/ol>\n\n\/\/ worker.js\nself.onmessage = function(event) {\n const sayi = event.data;\n let sonuc = 1;\n for (let i = 2; i <= sayi; i++) {\n sonuc *= i;\n }\n self.postMessage(sonuc); \/\/ Sonucu ana i\u015f par\u00e7ac\u0131\u011f\u0131na g\u00f6nder\n};\n <\/pre>\n<\/code><\/p>\n
\n\/\/ main.js\nconst myWorker = new Worker('worker.js');\n\nmyWorker.onmessage = function(event) {\n console.log('Worker\\'dan gelen sonu\u00e7:', event.data);\n document.getElementById('sonuc').innerText = Hesaplanan De\u011fer: ${event.data}<\/code>;\n};\n\nmyWorker.onerror = function(error) {\n console.error('Worker Hatas\u0131:', error);\n};\n\nfunction hesaplamayiBaslat() {\n const input = document.getElementById('sayiInput').value;\n const sayi = parseInt(input);\n if (!isNaN(sayi)) {\n myWorker.postMessage(sayi); \/\/ Worker'a say\u0131y\u0131 g\u00f6nder\n document.getElementById('sonuc').innerText = 'Hesaplan\u0131yor...';\n } else {\n alert('L\u00fctfen ge\u00e7erli bir say\u0131 girin.');\n }\n}\n\n\/\/ HTML'de bir buton ve bir input ile bu fonksiyon \u00e7a\u011fr\u0131labilir\n\/\/ Hesapla<\/button>\n\/\/ <\/p>\n <\/pre>\n
<\/code><\/p>\n
Vaka Analizi: B\u00fcy\u00fck G\u00f6r\u00fcnt\u00fc \u0130\u015fleme<\/strong><\/p>\nBir web uygulamas\u0131 d\u00fc\u015f\u00fcn\u00fcn ki, kullan\u0131c\u0131lar\u0131n y\u00fckledi\u011fi y\u00fcksek \u00e7\u00f6z\u00fcn\u00fcrl\u00fckl\u00fc foto\u011fraflara filtreler uygulamas\u0131 veya yeniden boyutland\u0131rmas\u0131 gerekiyor. E\u011fer bu i\u015flemler ana i\u015f par\u00e7ac\u0131\u011f\u0131nda yap\u0131l\u0131rsa, g\u00f6r\u00fcnt\u00fc b\u00fcy\u00fcd\u00fck\u00e7e uygulaman\u0131n donma s\u00fcresi de artar. Bu senaryoda, Web Workers kullanmak harika bir \u00e7\u00f6z\u00fcmd\u00fcr. Kullan\u0131c\u0131 foto\u011fraf\u0131 y\u00fckledi\u011finde, g\u00f6r\u00fcnt\u00fc verileri (\u00f6rne\u011fin bir ImageData<\/code> nesnesi veya ArrayBuffer<\/code> olarak) bir worker'a g\u00f6nderilir. Worker, bu veriyi al\u0131p t\u00fcm filtreleme veya yeniden boyutland\u0131rma i\u015flemlerini ba\u011f\u0131ms\u0131z olarak yapar. \u0130\u015flem tamamland\u0131\u011f\u0131nda, sonu\u00e7ta ortaya \u00e7\u0131kan i\u015flenmi\u015f g\u00f6r\u00fcnt\u00fc verisini ana i\u015f par\u00e7ac\u0131\u011f\u0131na geri g\u00f6nderir. Ana i\u015f par\u00e7ac\u0131\u011f\u0131 bu veriyi al\u0131p bir <\/code> elementine \u00e7izebilir veya g\u00f6r\u00fcnt\u00fc olarak g\u00f6sterebilir. Bu sayede, kullan\u0131c\u0131 filtreleme i\u015flemi devam ederken bile sayfay\u0131 kayd\u0131rabilir, ba\u015fka butonlara t\u0131klayabilir veya uygulaman\u0131n di\u011fer b\u00f6l\u00fcmleriyle etkile\u015fim kurabilir. Bu durum, \u00f6zellikle mobil cihazlarda veya d\u00fc\u015f\u00fck g\u00fc\u00e7l\u00fc bilgisayarlarda \u00e7ok daha ak\u0131c\u0131 bir kullan\u0131c\u0131 deneyimi sa\u011flar.<\/p>\n\n Uzman \u0130pucu: Web Worker'lar aras\u0131nda karma\u015f\u0131k nesneleri
postMessage()<\/code> ile g\u00f6nderirken, veri kopyalama maliyetini azaltmak i\u00e7in Transferable Objects<\/code> kullanmay\u0131 d\u00fc\u015f\u00fcnebilirsiniz. \u00d6zellikle ArrayBuffer<\/code> gibi b\u00fcy\u00fck verilerde performans art\u0131\u015f\u0131 sa\u011flar.\n <\/div>\nAncak Web Workers'\u0131n da kendi i\u00e7inde k\u0131s\u0131tlamalar\u0131 vard\u0131r. \u00d6rne\u011fin, farkl\u0131 worker'lar do\u011frudan birbirleriyle veya ana i\u015f par\u00e7ac\u0131\u011f\u0131yla ortak bir belle\u011fi payla\u015famaz. Her mesajla\u015fma i\u015fleminde verinin kopyalanmas\u0131 gerekir, bu da b\u00fcy\u00fck veri setleri i\u00e7in ek y\u00fck getirebilir. \u0130\u015fte bu noktada SharedArrayBuffer gibi daha ileri d\u00fczey API'ler devreye girer. Yine de, basit ve orta d\u00fczeyde CPU-yo\u011fun g\u00f6revler i\u00e7in Web Workers, ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n \u00f6zg\u00fcrl\u00fc\u011f\u00fcn\u00fc korumak ad\u0131na alt\u0131n standartt\u0131r.<\/p>\n
SharedArrayBuffer ve Atomics: \u00c7oklu \u0130\u015f Par\u00e7ac\u0131klar\u0131 Aras\u0131nda G\u00fcvenli Veri Payla\u015f\u0131m\u0131<\/h2>\n Web Workers, paralel i\u015flem yapma yetene\u011fi sunsa da, i\u015f par\u00e7ac\u0131klar\u0131 aras\u0131nda do\u011frudan bellek payla\u015f\u0131m\u0131 yapmad\u0131\u011f\u0131 i\u00e7in b\u00fcy\u00fck veri setlerinin s\u00fcrekli kopyalanmas\u0131 performans darbo\u011fazlar\u0131na yol a\u00e7abilir. \u0130\u015fte SharedArrayBuffer (SAB) ve Atomics API'leri tam da bu noktada devreye girer. SAB, birden fazla i\u015f par\u00e7ac\u0131\u011f\u0131 (main thread ve Web Workers) taraf\u0131ndan ayn\u0131 anda okunabilen ve yaz\u0131labilen, payla\u015f\u0131lan bir bellek alan\u0131 olu\u015fturman\u0131za olanak tan\u0131r. Bu, veri kopyalama ihtiyac\u0131n\u0131 ortadan kald\u0131rarak i\u015f par\u00e7ac\u0131klar\u0131 aras\u0131 ileti\u015fimi \u00e7ok daha verimli hale getirir. Ancak, birden fazla i\u015f par\u00e7ac\u0131\u011f\u0131 ayn\u0131 bellek b\u00f6lgesine ayn\u0131 anda eri\u015fmeye \u00e7al\u0131\u015ft\u0131\u011f\u0131nda ortaya \u00e7\u0131kan \"yar\u0131\u015f ko\u015fulu\" (race condition) sorunlar\u0131 ve tutars\u0131z veri durumlar\u0131 gibi karma\u015f\u0131k senkronizasyon problemleri de beraberinde gelir.<\/p>\n
Bu senkronizasyon problemlerini \u00e7\u00f6zmek i\u00e7in Atomics API'leri kullan\u0131l\u0131r. Atomics, SharedArrayBuffer \u00fczerinde atomik (b\u00f6l\u00fcnemez) i\u015flemler yapmay\u0131 sa\u011flayan bir dizi statik metot sunar. Atomik bir i\u015flem, tamamlanana kadar di\u011fer i\u015f par\u00e7ac\u0131klar\u0131 taraf\u0131ndan kesilemeyen veya ayn\u0131 bellek konumuna eri\u015femeyen bir i\u015flemdir. Bu, verinin her zaman tutarl\u0131 kalmas\u0131n\u0131 sa\u011flar ve yar\u0131\u015f ko\u015fullar\u0131n\u0131 engeller. Atomics API'si, \u00f6zellikle wait<\/code>, notify<\/code>, add<\/code>, sub<\/code>, and<\/code>, or<\/code>, xor<\/code>, exchange<\/code>, compareExchange<\/code> gibi metotlar i\u00e7erir. Bu metotlar, i\u015f par\u00e7ac\u0131klar\u0131n\u0131n belirli bir ko\u015fulun ger\u00e7ekle\u015fmesini beklemesini (Atomics.wait()<\/code>) veya bir ko\u015fulun ger\u00e7ekle\u015fti\u011fini di\u011fer i\u015f par\u00e7ac\u0131klar\u0131na bildirmesini (Atomics.notify()<\/code>) sa\u011flayarak karma\u015f\u0131k senkronizasyon mekanizmalar\u0131 olu\u015fturmam\u0131za olanak tan\u0131r.<\/p>\n\n\/\/ worker.js (\u00f6rnek)\nself.onmessage = function(event) {\n const { sharedBuffer, offset, value } = event.data;\n const sharedArray = new Int32Array(sharedBuffer);\n\n \/\/ Ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n haz\u0131r olmas\u0131n\u0131 bekleyin\n Atomics.wait(sharedArray, 0, 0); \/\/ sharedArray[0] de\u011feri 0 ise bekle\n\n \/\/ Atomik bir \u015fekilde de\u011feri art\u0131r\u0131n\n const oldValue = Atomics.add(sharedArray, offset, value);\n console.log(Worker: Eski de\u011fer ${oldValue}, Yeni de\u011fer ${sharedArray[offset]}<\/code>);\n\n \/\/ Ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 bilgilendirin\n Atomics.notify(sharedArray, 0, 1); \/\/ sharedArray[0] i\u00e7in bekleyen 1 i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 serbest b\u0131rak\n};\n <\/pre>\n<\/code><\/p>\n
\n\/\/ main.js (\u00f6rnek)\nconst buffer = new SharedArrayBuffer(4 * Int32Array.BYTES_PER_ELEMENT); \/\/ 4 elemanl\u0131k Int32 dizisi\nconst sharedArray = new Int32Array(buffer);\n\n\/\/ Ba\u015flang\u0131\u00e7 de\u011ferini s\u0131f\u0131rlay\u0131n\nAtomics.store(sharedArray, 0, 0); \/\/ \u0130\u015f par\u00e7ac\u0131\u011f\u0131 senkronizasyonu i\u00e7in kullanaca\u011f\u0131z\n\nconst worker1 = new Worker('worker.js');\nconst worker2 = new Worker('worker.js');\n\nworker1.postMessage({ sharedBuffer: buffer, offset: 1, value: 5 });\nworker2.postMessage({ sharedBuffer: buffer, offset: 2, value: 10 });\n\n\/\/ Worker'lar\u0131n i\u015flerini yapmas\u0131n\u0131 bekleyelim\nconsole.log('Main: Worker\\'lar\u0131n tamamlamas\u0131n\u0131 bekliyorum...');\nAtomics.wait(sharedArray, 0, 0); \/\/ sharedArray[0] hala 0 ise bekle (ilk worker i\u00e7in)\nAtomics.store(sharedArray, 0, 0); \/\/ S\u0131f\u0131rla\nAtomics.wait(sharedArray, 0, 0); \/\/ sharedArray[0] hala 0 ise bekle (ikinci worker i\u00e7in)\n\n\nconsole.log('Main: T\u00fcm worker\\'lar tamamland\u0131.');\nconsole.log('Main: Payla\u015f\u0131lan dizinin son hali:', sharedArray); \/\/ [0, 5, 10, 0] veya benzeri\n <\/pre>\n<\/code><\/p>\n
Vaka Analizi: Ger\u00e7ek Zamanl\u0131 Veri Panosu<\/strong><\/p>\nY\u00fcksek performansl\u0131 bir finansal ticaret uygulamas\u0131 veya bir sens\u00f6r verisi izleme panosu d\u00fc\u015f\u00fcn\u00fcn. Bu t\u00fcr uygulamalarda, farkl\u0131 kaynaklardan gelen binlerce veri noktas\u0131 saniyede g\u00fcncellenebilir ve bu verilerin h\u0131zl\u0131ca i\u015flenip kullan\u0131c\u0131 aray\u00fcz\u00fcnde g\u00f6sterilmesi gerekebilir. E\u011fer bu i\u015flemleri birden fazla worker'a da\u011f\u0131tmak istiyorsak ve bu worker'lar ayn\u0131 payla\u015f\u0131lan bir bellek alan\u0131n\u0131 kullanarak toplamlar, ortalamalar veya di\u011fer istatistiksel hesaplamalar yapacaksa, SharedArrayBuffer ve Atomics vazge\u00e7ilmezdir. Bir worker, belirli bir veri dilimini i\u015fleyip sonucu do\u011frudan payla\u015f\u0131lan arabelle\u011fe yazabilirken, di\u011fer worker'lar farkl\u0131 dilimleri i\u015fleyebilir. Ana i\u015f par\u00e7ac\u0131\u011f\u0131 ise payla\u015f\u0131lan arabelle\u011fi do\u011frudan okuyarak verileri g\u00f6rselle\u015ftirebilir. Atomics sayesinde, birden fazla worker'\u0131n ayn\u0131 anda ayn\u0131 h\u00fccreye yazmaya \u00e7al\u0131\u015fmas\u0131 veya tutars\u0131z veri okumas\u0131 gibi kritik hatalar\u0131n \u00f6n\u00fcne ge\u00e7ilir. Bu kurulum, devasa veri setlerinin paralel olarak i\u015flenmesini ve ger\u00e7ek zamanl\u0131 g\u00fcncellemelerle kullan\u0131c\u0131ya sunulmas\u0131n\u0131 m\u00fcmk\u00fcn k\u0131lar, b\u00f6ylece performans art\u0131\u015f\u0131 dramatik boyutlara ula\u015f\u0131r.<\/p>\n
SharedArrayBuffer ve Atomics, JavaScript'i daha d\u00fc\u015f\u00fck seviyeli, bellek tabanl\u0131 paralel programlamaya yakla\u015ft\u0131r\u0131r. Ancak bu g\u00fc\u00e7l\u00fc ara\u00e7lar, do\u011fru senkronizasyon mekanizmalar\u0131 kurulmad\u0131\u011f\u0131nda karma\u015f\u0131k hatalara yol a\u00e7abilir. Bu nedenle, bunlar\u0131 kullan\u0131rken dikkatli olmak ve e\u015fzamanl\u0131l\u0131k ilkelerini iyi anlamak b\u00fcy\u00fck \u00f6nem ta\u015f\u0131r. Ancak do\u011fru kullan\u0131ld\u0131\u011f\u0131nda, JavaScript uygulamalar\u0131n\u0131n performans s\u0131n\u0131rlar\u0131n\u0131 radikal bir \u015fekilde geni\u015fletebilirler.<\/p>\n
Service Workers ve Arka Plan Senkronizasyonu: \u00c7evrimd\u0131\u015f\u0131 Yetenekler ve Performans Optimizasyonu<\/h2>\n Service Workers, modern web uygulamalar\u0131n\u0131n \u00e7evrimd\u0131\u015f\u0131 \u00e7al\u0131\u015fmas\u0131n\u0131, h\u0131zl\u0131 y\u00fcklenmesini ve g\u00fcvenilir olmas\u0131n\u0131 sa\u011flayan, taray\u0131c\u0131 taraf\u0131ndan ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan ayr\u0131 olarak y\u00fcr\u00fct\u00fclen \u00f6zel bir t\u00fcr Web Worker'd\u0131r. Temel olarak, bir Service Worker bir web sayfas\u0131 ile a\u011f aras\u0131ndaki bir proxy g\u00f6revi g\u00f6r\u00fcr. Bu, onun a\u011f isteklerini kesmesine, \u00f6nbelle\u011fe almas\u0131na ve gerekti\u011finde \u00f6nbellekten yan\u0131t vermesine olanak tan\u0131r. Bir Service Worker etkinle\u015ftirildi\u011finde ve y\u00fcklendi\u011finde, web uygulamas\u0131 kapat\u0131lm\u0131\u015f olsa bile arka planda \u00e7al\u0131\u015fmaya devam edebilir ve hatta a\u011f ba\u011flant\u0131s\u0131 olmasa bile \u00f6nbelle\u011fe al\u0131nm\u0131\u015f i\u00e7eri\u011fi sunabilir.<\/p>\n
Service Workers'\u0131n g\u00fcc\u00fc sadece \u00f6nbellekleme ile s\u0131n\u0131rl\u0131 de\u011fildir; ayn\u0131 zamanda \"Arka Plan Senkronizasyonu\" (Background Sync) gibi ileri d\u00fczey \u00f6zellikler de sunar. Background Sync API'si, bir kullan\u0131c\u0131n\u0131n a\u011f ba\u011flant\u0131s\u0131 olmad\u0131\u011f\u0131nda bile bir sunucuyla veri senkronizasyonu yapmas\u0131na olanak tan\u0131r. \u00d6rne\u011fin, kullan\u0131c\u0131 bir e-posta tasla\u011f\u0131 yaz\u0131p \"g\u00f6nder\" butonuna t\u0131klad\u0131\u011f\u0131nda ancak \u00e7evrimd\u0131\u015f\u0131 oldu\u011funda, Service Worker bu iste\u011fi yakalar ve cihaz tekrar \u00e7evrimi\u00e7i oldu\u011funda otomatik olarak sunucuya g\u00f6nderilmek \u00fczere s\u0131raya al\u0131r. Bu, kullan\u0131c\u0131 deneyimini \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirir \u00e7\u00fcnk\u00fc kullan\u0131c\u0131 a\u011f sorunlar\u0131 nedeniyle i\u015flerinin yar\u0131m kalmas\u0131ndan endi\u015fe etmez.<\/p>\n
Service Worker Temel \u0130\u015flevleri ve Kullan\u0131m\u0131:<\/h3>\n\nKurulum ve Etkinle\u015ftirme:<\/strong> Bir Service Worker kaydoldu\u011funda, taray\u0131c\u0131 bir 'install' olay\u0131 tetikler. Bu olayda, uygulaman\u0131z\u0131n \u00e7al\u0131\u015fmas\u0131 i\u00e7in gerekli olan t\u00fcm statik varl\u0131klar\u0131 (HTML, CSS, JS dosyalar\u0131, resimler vb.) \u00f6nbelle\u011fe alabilirsiniz. Kurulum tamamland\u0131\u011f\u0131nda ve eski Service Worker'lar temizlendi\u011finde 'activate' olay\u0131 tetiklenir.<\/li>\nFetch Olay\u0131:<\/strong> Bu, bir Service Worker'\u0131n en kritik olay\u0131d\u0131r. Sayfadan yap\u0131lan her a\u011f iste\u011fini (fetch<\/code>) keser. Bu noktada, \u00f6nbellekte belirli bir kaynak olup olmad\u0131\u011f\u0131n\u0131 kontrol edebilir, yoksa a\u011f\u0131 kullanabilir ve yan\u0131t\u0131 \u00f6nbelle\u011fe alabilirsiniz. Bu stratejilere \"Cache-first\", \"Network-first\" veya \"Stale-While-Revalidate\" gibi isimler verilir.<\/li>\nArka Plan Senkronizasyonu:<\/strong> sync<\/code> olay\u0131n\u0131 kullanarak \u00e7evrimd\u0131\u015f\u0131 durumda bekleyen istekleri y\u00f6netebilirsiniz. Kullan\u0131c\u0131 tekrar \u00e7evrimi\u00e7i oldu\u011funda, taray\u0131c\u0131 Service Worker'\u0131 uyand\u0131r\u0131r ve bekleyen senkronizasyon g\u00f6revlerini tetikler.<\/li>\n<\/ul>\n\n\/\/ sw.js (Service Worker script)\nconst CACHE_NAME = 'my-app-cache-v1';\nconst urlsToCache = [\n '\/',\n '\/index.html',\n '\/styles.css',\n '\/app.js',\n '\/images\/logo.png'\n];\n\nself.addEventListener('install', event => {\n event.waitUntil(\n caches.open(CACHE_NAME)\n .then(cache => {\n console.log('\u00d6nbellek a\u00e7\u0131ld\u0131 ve dosyalar eklendi');\n return cache.addAll(urlsToCache);\n })\n );\n});\n\nself.addEventListener('fetch', event => {\n event.respondWith(\n caches.match(event.request)\n .then(response => {\n if (response) {\n console.log('\u00d6nbellekten yan\u0131t veriliyor:', event.request.url);\n return response; \/\/ \u00d6nbellekte varsa \u00f6nbellekten d\u00f6nd\u00fcr\n }\n console.log('A\u011fdan \u00e7ekiliyor:', event.request.url);\n return fetch(event.request); \/\/ Yoksa a\u011f\u0131 kullan\n })\n );\n});\n\n\/\/ Arka Plan Senkronizasyonu \u00f6rne\u011fi\nself.addEventListener('sync', event => {\n if (event.tag === 'send-offline-data') {\n event.waitUntil(sendOfflineData());\n }\n});\n\nasync function sendOfflineData() {\n \/\/ Burada IndexedDB'den veya ba\u015fka bir depolama alan\u0131ndan bekleyen verileri okuyup\n \/\/ bir API'ye g\u00f6nderme mant\u0131\u011f\u0131 yer alacak\n console.log('Arka plan senkronizasyonu tetiklendi!');\n \/\/ \u00d6rnek: Ger\u00e7ek bir API \u00e7a\u011fr\u0131s\u0131\n \/\/ const dataToSend = await getFromIndexedDB('offline_posts');\n \/\/ await fetch('\/api\/submit', { method: 'POST', body: JSON.stringify(dataToSend) });\n \/\/ console.log('\u00c7evrimd\u0131\u015f\u0131 veriler ba\u015far\u0131yla g\u00f6nderildi.');\n}\n <\/pre>\n<\/code><\/p>\n
\n\/\/ app.js (Ana i\u015f par\u00e7ac\u0131\u011f\u0131)\nif ('serviceWorker' in navigator) {\n window.addEventListener('load', () => {\n navigator.serviceWorker.register('\/sw.js')\n .then(registration => {\n console.log('Service Worker ba\u015far\u0131yla kaydedildi:', registration.scope);\n })\n .catch(error => {\n console.error('Service Worker kayd\u0131 ba\u015far\u0131s\u0131z oldu:', error);\n });\n });\n}\n\nfunction kaydetOffline() {\n \/\/ \u00d6rnek: \u00c7evrimd\u0131\u015f\u0131 bir eylemi kaydetme\n console.log('\u00c7evrimd\u0131\u015f\u0131 kaydetme denemesi...');\n \/\/ Veriyi IndexedDB'ye kaydedin veya benzer bir depolama kullan\u0131n\n \/\/ Daha sonra Service Worker'\u0131 senkronizasyon i\u00e7in kaydedin\n if ('serviceWorker' in navigator && 'SyncManager' in window) {\n navigator.serviceWorker.ready.then(registration => {\n registration.sync.register('send-offline-data')\n .then(() => console.log('Arka plan senkronizasyonu i\u00e7in kaydedildi'))\n .catch(err => console.error('Senkronizasyon kayd\u0131 ba\u015far\u0131s\u0131z:', err));\n });\n }\n}\n\n\/\/ HTML'de bir buton ile bu fonksiyon \u00e7a\u011fr\u0131labilir\n\/\/ \u00c7evrimd\u0131\u015f\u0131 Kaydet<\/button>\n <\/pre>\n<\/code><\/p>\n
Service Workers, Progressive Web App (PWA) geli\u015ftirmenin temel ta\u015flar\u0131ndan biridir. Mobil cihazlarda dahi h\u0131zl\u0131 ve g\u00fcvenilir bir deneyim sunarak web uygulamalar\u0131n\u0131 yerel uygulamalara yakla\u015ft\u0131r\u0131r. G\u00fcvenlik a\u00e7\u0131s\u0131ndan, sadece HTTPS \u00fczerinden sunulan sayfalarda \u00e7al\u0131\u015f\u0131r, bu da kullan\u0131c\u0131 verilerinin g\u00fcvenli\u011fini garanti eder. \u00d6zetle, Service Workers, sadece e\u015fzamanl\u0131l\u0131k sa\u011flamakla kalmaz, ayn\u0131 zamanda web'in \u00e7evrimd\u0131\u015f\u0131 yeteneklerini ve performans\u0131n\u0131 tamamen yeni bir seviyeye ta\u015f\u0131yan kritik bir teknolojidir. 2025 ve sonras\u0131nda, her modern web uygulamas\u0131n\u0131n bu teknolojiden faydalanmas\u0131 beklenmektedir.<\/p>\n
2025 ve \u00d6tesi: Gelecek Beklentileri ve Yeni API'ler<\/h2>\n JavaScript ekosistemi, e\u015fzamanl\u0131l\u0131k ve paralel programlama yeteneklerini s\u00fcrekli olarak geli\u015ftirmekte ve 2025 y\u0131l\u0131 bu evrimin heyecan verici bir d\u00f6nemecini temsil etmektedir. Web Workers, SharedArrayBuffer ve Service Workers gibi mevcut API'ler zaten g\u00fc\u00e7l\u00fc yetenekler sunsa da, gelecek daha da ileri d\u00fczey ara\u00e7larla doludur. \u00d6zellikle, taray\u0131c\u0131 tabanl\u0131 paralelizmde ortaya \u00e7\u0131kan yeni standartlar ve Node.js'in sunucu taraf\u0131 i\u015f par\u00e7ac\u0131\u011f\u0131 y\u00f6netimi, geli\u015ftiricilere daha \u00f6nce m\u00fcmk\u00fcn olmayan performans ve \u00f6l\u00e7eklenebilirlik imkanlar\u0131 sunmaktad\u0131r.<\/p>\n
Node.js Worker Threads: Sunucu Taraf\u0131 Paralelizm<\/h3>\n Node.js, tek i\u015f par\u00e7ac\u0131kl\u0131 ve olay tabanl\u0131 mimarisi sayesinde I\/O yo\u011fun uygulamalarda olduk\u00e7a ba\u015far\u0131l\u0131d\u0131r. Ancak, CPU-yo\u011fun g\u00f6revler (\u00f6rne\u011fin, \u015fifreleme, veri s\u0131k\u0131\u015ft\u0131rma, karma\u015f\u0131k matematiksel hesaplamalar) Node.js'in ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 bloke edebilir ve uygulaman\u0131n performans\u0131n\u0131 d\u00fc\u015f\u00fcrebilir. Bu sorunu \u00e7\u00f6zmek i\u00e7in Node.js, worker_threads<\/code> mod\u00fcl\u00fcn\u00fc tan\u0131tm\u0131\u015ft\u0131r. Bu mod\u00fcl, Node.js uygulamalar\u0131n\u0131n birden fazla JavaScript i\u015f par\u00e7ac\u0131\u011f\u0131nda kodu paralel olarak y\u00fcr\u00fctmesine olanak tan\u0131r. Taray\u0131c\u0131daki Web Workers'a benzer \u015fekilde, Worker Threads'ler de ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan ba\u011f\u0131ms\u0131zd\u0131r ve mesajla\u015fma yoluyla ileti\u015fim kurarlar. Ancak, Node.js ortam\u0131nda olduklar\u0131 i\u00e7in I\/O i\u015flemleri \u00fczerinde daha fazla kontrole sahiptirler ve SharedArrayBuffer gibi payla\u015f\u0131lan bellek yap\u0131lar\u0131n\u0131 da desteklerler.<\/p>\nBir Node.js Worker Thread'i, sunucunuzun birden fazla CPU \u00e7ekirde\u011finden tam olarak faydalanmas\u0131n\u0131 sa\u011flar. \u00d6rne\u011fin, bir API iste\u011fi geldi\u011finde ve bu iste\u011fin bir par\u00e7as\u0131 olarak b\u00fcy\u00fck bir g\u00f6r\u00fcnt\u00fcn\u00fcn i\u015flenmesi gerekiyorsa, bu i\u015flem ayr\u0131 bir worker thread'e devredilebilir. Ana i\u015f par\u00e7ac\u0131\u011f\u0131 bu s\u0131rada di\u011fer gelen istekleri i\u015flemeye devam eder. B\u00f6ylece, sunucu yan\u0131t verme s\u00fcresini korurken, CPU-yo\u011fun g\u00f6revler de etkin bir \u015fekilde tamamlanm\u0131\u015f olur. Bu, \u00f6zellikle mikro hizmet tabanl\u0131 mimarilerde veya y\u00fcksek trafikli sunucu uygulamalar\u0131nda kritik bir performans art\u0131\u015f\u0131 sa\u011flar.<\/p>\n
\n\/\/ worker.js (Node.js Worker Thread)\nconst { parentPort } = require('worker_threads');\n\nparentPort.on('message', (message) => {\n if (message.type === 'calculateFactorial') {\n let result = 1;\n for (let i = 2; i <= message.data; i++) {\n result *= i;\n }\n parentPort.postMessage({ type: 'factorialResult', result });\n }\n});\n <\/pre>\n<\/code><\/p>\n
\n\/\/ main.js (Node.js Ana Uygulama)\nconst { Worker } = require('worker_threads');\n\nfunction calculateFactorialInWorker(number) {\n return new Promise((resolve, reject) => {\n const worker = new Worker('.\/worker.js');\n worker.postMessage({ type: 'calculateFactorial', data: number });\n\n worker.on('message', (message) => {\n if (message.type === 'factorialResult') {\n resolve(message.result);\n worker.terminate(); \/\/ \u0130\u015flem bitince worker'\u0131 sonland\u0131r\n }\n });\n\n worker.on('error', reject);\n worker.on('exit', (code) => {\n if (code !== 0)\n reject(new Error(Worker ${worker.threadId} durduruldu, \u00e7\u0131k\u0131\u015f kodu: ${code}<\/code>));\n });\n });\n}\n\nasync function runCalculations() {\n console.log('Ana i\u015f par\u00e7ac\u0131\u011f\u0131: Hesaplamalar ba\u015fl\u0131yor...');\n try {\n const result1 = await calculateFactorialInWorker(10);\n console.log(Ana i\u015f par\u00e7ac\u0131\u011f\u0131: 10! = ${result1}<\/code>);\n\n const result2 = await calculateFactorialInWorker(15);\n console.log(Ana i\u015f par\u00e7ac\u0131\u011f\u0131: 15! = ${result2}<\/code>);\n } catch (error) {\n console.error('Ana i\u015f par\u00e7ac\u0131\u011f\u0131: Bir hata olu\u015ftu:', error);\n }\n console.log('Ana i\u015f par\u00e7ac\u0131\u011f\u0131: Hesaplamalar bitti.');\n}\n\nrunCalculations();\n <\/pre>\n<\/code><\/p>\n
WebGPU ve WebAssembly: Y\u00fcksek Performansl\u0131 Hesaplamalar<\/h3>\n 2025'te WebGPU'nun daha yayg\u0131nla\u015fmas\u0131 bekleniyor. WebGPU, web \u00fczerinde modern GPU donan\u0131m\u0131na eri\u015fim sa\u011flayan yeni bir API'dir. Sadece 3D grafikler i\u00e7in de\u011fil, ayn\u0131 zamanda genel ama\u00e7l\u0131 GPU hesaplamalar\u0131 (GPGPU) i\u00e7in de kullan\u0131labilir. Bu, b\u00fcy\u00fck matris \u00e7arp\u0131mlar\u0131, makine \u00f6\u011frenimi modellerinin \u00e7\u0131kar\u0131m\u0131 veya bilimsel sim\u00fclasyonlar gibi yo\u011fun hesaplama gerektiren g\u00f6revlerin do\u011frudan GPU \u00fczerinde \u00e7ok daha h\u0131zl\u0131 y\u00fcr\u00fct\u00fclebilece\u011fi anlam\u0131na gelir. JavaScript ile WebGPU API'si \u00fczerinden GPU'ya komutlar g\u00f6nderilebilir, bu da web uygulamalar\u0131n\u0131n inan\u0131lmaz performans seviyelerine ula\u015fmas\u0131n\u0131 sa\u011flar.<\/p>\n
WebAssembly (Wasm) ise, taray\u0131c\u0131da neredeyse yerel h\u0131zlarda \u00e7al\u0131\u015fan, d\u00fc\u015f\u00fck seviyeli bir ikili kod format\u0131d\u0131r. C, C++, Rust gibi dillerde yaz\u0131lm\u0131\u015f kodlar\u0131n web'e derlenmesini ve JavaScript'in kendisinden \u00e7ok daha h\u0131zl\u0131 \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar. \u00d6zellikle CPU-yo\u011fun algoritmalar veya mevcut yerel k\u00fct\u00fcphanelerin web'e ta\u015f\u0131nmas\u0131 gerekti\u011finde Wasm vazge\u00e7ilmezdir. Wasm mod\u00fclleri Web Workers i\u00e7inde \u00e7al\u0131\u015ft\u0131r\u0131labilir, bu da paralel olarak y\u00fcksek performansl\u0131 hesaplamalar yapma yetene\u011fi sunar. Gelecekte, Wasm mod\u00fcllerinin do\u011frudan SharedArrayBuffer ile etkile\u015fime girmesi ve Atomics API'lerini kullanmas\u0131, JavaScript ile birle\u015fti\u011finde web'deki paralel programlama potansiyelini daha da art\u0131racakt\u0131r.<\/p>\n
Gelecekteki \u0130leti\u015fim Standartlar\u0131: WebTransport<\/h3>\n WebTransport, 2025'te daha da olgunla\u015fmas\u0131 beklenen, d\u00fc\u015f\u00fck gecikmeli, \u00e7ift y\u00f6nl\u00fc istemci-sunucu ileti\u015fimi i\u00e7in yeni bir API'dir. WebSockets'a bir alternatif olarak geli\u015ftirilen WebTransport, QUIC protokol\u00fcn\u00fc temel al\u0131r ve \u00e7oklu ak\u0131\u015f (multiplexing) ile g\u00fcvenilirlik gibi geli\u015fmi\u015f \u00f6zellikler sunar. Bu, \u00f6zellikle oyunlar, ger\u00e7ek zamanl\u0131 video konferanslar veya y\u00fcksek frekansl\u0131 veri ak\u0131\u015flar\u0131 gibi uygulamalar i\u00e7in idealdir. WebSockets'\u0131n aksine, WebTransport veri kay\u0131plar\u0131n\u0131 daha iyi y\u00f6netebilir ve ba\u015f-s\u0131ra engelleme (head-of-line blocking) sorununu azalt\u0131r, bu da daha ak\u0131c\u0131 ve daha duyarl\u0131 ger\u00e7ek zamanl\u0131 deneyimler sunar.<\/p>\n
T\u00fcm bu geli\u015fmeler bir araya geldi\u011finde, 2025 ve sonras\u0131 i\u00e7in JavaScript e\u015fzamanl\u0131l\u0131\u011f\u0131, sadece asenkron I\/O y\u00f6netiminden \u00e7ok daha fazlas\u0131n\u0131 ifade ediyor. Ger\u00e7ek \u00e7oklu i\u015f par\u00e7ac\u0131kl\u0131 CPU hesaplamalar\u0131, GPU h\u0131zland\u0131rmal\u0131 algoritmalar ve y\u00fcksek performansl\u0131 a\u011f ileti\u015fimi, web geli\u015ftiricilerinin elindeki ara\u00e7 setini geni\u015fleterek, her zamankinden daha iddial\u0131 ve yetenekli uygulamalar geli\u015ftirmelerine olanak tan\u0131yor. Bu, JavaScript'in sadece bir web dili olmaktan \u00e7\u0131k\u0131p, genel ama\u00e7l\u0131, y\u00fcksek performansl\u0131 bir programlama platformu olma yolunda att\u0131\u011f\u0131 dev bir ad\u0131md\u0131r.<\/p>\n
Sonu\u00e7 ve S\u0131k\u00e7a Sorulan Sorular<\/h2>\n Modern JavaScript e\u015fzamanl\u0131l\u0131\u011f\u0131, tek i\u015f par\u00e7ac\u0131kl\u0131 bir dilin s\u0131n\u0131rlar\u0131n\u0131 a\u015farak web ve sunucu uygulamalar\u0131n\u0131n performans\u0131n\u0131, yan\u0131t verebilirli\u011fini ve \u00f6l\u00e7eklenebilirli\u011fini \u00e7arp\u0131c\u0131 bir \u015fekilde art\u0131rm\u0131\u015ft\u0131r. Olay d\u00f6ng\u00fcs\u00fc, Promise'ler ve Async\/Await gibi temel asenkron mekanizmalarla ba\u015flayan bu yolculuk, Web Workers, SharedArrayBuffer ve Atomics ile ger\u00e7ek paralel programlama yeteneklerine evrildi. Ayr\u0131ca, Service Workers sayesinde \u00e7evrimd\u0131\u015f\u0131 destek, arka plan senkronizasyonu ve PWA'lar i\u00e7in temel bir yap\u0131 ta\u015f\u0131 haline geldi. 2025 ve sonras\u0131nda ise Node.js Worker Threads, WebGPU ve WebTransport gibi teknolojilerle JavaScript'in y\u00fcksek performansl\u0131 hesaplama ve ger\u00e7ek zamanl\u0131 ileti\u015fim yetenekleri daha da ileriye ta\u015f\u0131nmaktad\u0131r.<\/p>\n
Bu makale boyunca, JavaScript'in e\u015fzamanl\u0131l\u0131k evrimini, temelden ileri d\u00fczeye kadar \u00e7e\u015fitli API'leri ve bunlar\u0131n ger\u00e7ek d\u00fcnya senaryolar\u0131nda nas\u0131l kullan\u0131labilece\u011fini inceledik. Art\u0131k geli\u015ftiriciler, UI'\u0131 bloke etmeden yo\u011fun hesaplamalar yapabilir, \u00e7evrimd\u0131\u015f\u0131 ortamlarda dahi veri senkronizasyonu sa\u011flayabilir ve \u00e7ok \u00e7ekirdekli i\u015flemcilerin g\u00fcc\u00fcnden tam anlam\u0131yla faydalanabilirler. JavaScript, art\u0131k sadece etkile\u015fimli web sayfalar\u0131 olu\u015fturmaktan \u00e7ok daha fazlas\u0131n\u0131 yapabilen, g\u00fc\u00e7l\u00fc ve \u00e7ok y\u00f6nl\u00fc bir platformdur. Bu e\u015fzamanl\u0131l\u0131k ara\u00e7lar\u0131n\u0131 do\u011fru bir \u015fekilde anlamak ve uygulamak, modern web ve sunucu uygulamalar\u0131 geli\u015ftiren her geli\u015ftirici i\u00e7in kritik \u00f6neme sahiptir.<\/p>\n
S\u0131k\u00e7a Sorulan Sorular<\/h3>\n\nWeb Workers ile Node.js Worker Threads aras\u0131ndaki temel fark nedir?<\/dt>\n Her ikisi de ayr\u0131 i\u015f par\u00e7ac\u0131klar\u0131nda kod \u00e7al\u0131\u015ft\u0131rmak i\u00e7in kullan\u0131l\u0131rken, Web Workers taray\u0131c\u0131 ortam\u0131nda \u00e7al\u0131\u015f\u0131r ve DOM'a eri\u015fimi yoktur, Node.js Worker Threads ise sunucu taraf\u0131nda Node.js ortam\u0131nda \u00e7al\u0131\u015f\u0131r ve I\/O i\u015flemlerine daha fazla eri\u015fime sahiptir. Ayr\u0131ca, Node.js worker'lar\u0131 mod\u00fcl sistemini kullan\u0131rken, Web Workers'lar kendi scope'lar\u0131na sahiptir.<\/dd>\n SharedArrayBuffer kullan\u0131rken neden Atomics API'si gereklidir?<\/dt>\n SharedArrayBuffer, birden fazla i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n ayn\u0131 bellek alan\u0131na do\u011frudan eri\u015fmesini sa\u011flar. Ancak bu durum, ayn\u0131 anda belle\u011fe yazma veya okuma giri\u015fimleri nedeniyle \"yar\u0131\u015f ko\u015fullar\u0131\" ve veri tutars\u0131zl\u0131klar\u0131 olu\u015fturabilir. Atomics API'si, bu payla\u015f\u0131lan bellek \u00fczerinde atomik (b\u00f6l\u00fcnemez ve kesilemez) i\u015flemler yaparak veri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc ve senkronizasyonu garanti eder, b\u00f6ylece g\u00fcvenli \u00e7oklu i\u015f par\u00e7ac\u0131kl\u0131 eri\u015fim sa\u011flar.<\/dd>\n Service Workers ne t\u00fcr uygulamalar i\u00e7in en uygundur?<\/dt>\n Service Workers, \u00f6zellikle Progressive Web App'ler (PWA'lar), \u00e7evrimd\u0131\u015f\u0131 yetenek gerektiren uygulamalar, a\u011f ba\u011f\u0131ms\u0131zl\u0131\u011f\u0131na ihtiya\u00e7 duyan uygulamalar (\u00f6rne\u011fin, haber okuyucular, e-ticaret siteleri) ve arka planda veri senkronizasyonu veya push bildirimleri gibi \u00f6zelliklere sahip olmak isteyen t\u00fcm web uygulamalar\u0131 i\u00e7in uygundur. Performans\u0131 ve kullan\u0131c\u0131 deneyimini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131r.<\/dd>\n JavaScript'in gelecekteki e\u015fzamanl\u0131l\u0131k yetenekleri mobil cihazlar i\u00e7in ne anlama geliyor?<\/dt>\n Gelecekteki e\u015fzamanl\u0131l\u0131k yetenekleri, \u00f6zellikle WebGPU ve WebAssembly, mobil cihazlarda bile daha karma\u015f\u0131k ve performansl\u0131 web uygulamalar\u0131n\u0131n \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flayacak. Mobil cihazlar\u0131n donan\u0131m g\u00fcc\u00fc artt\u0131k\u00e7a, bu API'ler sayesinde web uygulamalar\u0131 mobil platformlarda neredeyse yerel uygulama deneyimi sunabilecek, grafik yo\u011fun oyunlar ve makine \u00f6\u011frenimi gibi alanlarda b\u00fcy\u00fck potansiyel ta\u015f\u0131yacakt\u0131r. \u00d6rne\u011fin, mobil web taray\u0131c\u0131s\u0131nda \u00e7al\u0131\u015fan bir 3D oyun, WebGPU ile \u00e7ok daha ak\u0131c\u0131 hale gelebilir.<\/dd>\n Mobil uyumlu HTML i\u00e7in e\u015fzamanl\u0131l\u0131k a\u00e7\u0131s\u0131ndan nelere dikkat etmeliyim?<\/dt>\n Mobil uyumlu HTML'de e\u015fzamanl\u0131l\u0131k, kullan\u0131c\u0131 deneyimi i\u00e7in kritik \u00f6neme sahiptir. A\u011f\u0131r hesaplamalar\u0131 Web Workers'a ta\u015f\u0131yarak ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n serbest kalmas\u0131n\u0131 sa\u011flay\u0131n ki kullan\u0131c\u0131 aray\u00fcz\u00fc her zaman yan\u0131t verebilsin. Ayr\u0131ca, Service Workers kullanarak \u00e7evrimd\u0131\u015f\u0131 \u00f6nbellekleme ve arka plan senkronizasyonu ile a\u011f ko\u015fullar\u0131 ne olursa olsun uygulaman\u0131z\u0131n h\u0131zl\u0131 ve g\u00fcvenilir kalmas\u0131n\u0131 sa\u011flay\u0131n. @media screen and (max-width: 768px) { ... }<\/code>) ile duyarl\u0131 tasar\u0131mlar olu\u015fturmak da temel mobil uyumluluk ad\u0131mlar\u0131d\u0131r. E\u015fzamanl\u0131l\u0131k, mobil cihazlarda pil \u00f6mr\u00fc ve kaynak k\u0131s\u0131tlamalar\u0131 nedeniyle daha da \u00f6nem kazan\u0131r; bu nedenle gereksiz i\u015flemleri minimize etmek veya ertelemek \u00f6nemlidir.<\/dd>\n<\/dl>\n<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript d\u00fcnyas\u0131, y\u0131llar i\u00e7inde tek i\u015f par\u00e7ac\u0131kl\u0131 do\u011fas\u0131ndan s\u0131yr\u0131larak e\u015fzamanl\u0131 ve paralel i\u015flem yeteneklerini geli\u015ftiren bir\u00e7ok yenili\u011fe sahne…","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":[129],"tags":[],"class_list":{"0":"post-32787","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-javascript","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\n
Modern JavaScript E\u015fzamanl\u0131l\u0131\u011f\u0131: 2025 ve Sonras\u0131<\/title>\n<meta name=\"description\" content=\"JavaScript d\u00fcnyas\u0131, y\u0131llar i\u00e7inde tek i\u015f par\u00e7ac\u0131kl\u0131 do\u011fas\u0131ndan s\u0131yr\u0131larak e\u015fzamanl\u0131 ve paralel i\u015flem yeteneklerini geli\u015ftiren bir\u00e7ok yenili\u011fe sahne oldu. G\u00fcn\u00fcm\u00fcz\u00fcn karma\u015f\u0131k web uygulamalar\u0131, y\u00fcksek performansl\u0131 algoritmalar ve ger\u00e7ek zamanl\u0131 etkile\u015fimler i\u00e7in bu yeteneklere her zamankinden daha fazla ihtiya\u00e7 duyuyor. Peki, 2025 itibar\u0131yla modern JavaScript e\u015fzamanl\u0131l\u0131\u011f\u0131 ne anlama geliyor ve geli\u015ftiriciler bu g\u00fc\u00e7l\u00fc ara\u00e7lar\u0131 nas\u0131l etkin bir \u015fekilde kullanabilir? 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