每个请求模型的线程能否比非阻塞I / O更快？(Can the thread per request model be faster than non-blocking I/O?)

 我记得在2，3年前阅读过一些文章，人们称现代线程库变得如此优秀，以致每个请求线程的服务器不仅比非阻塞服务器更容易编写，而且它们也会更快。 我相信甚至在Java中使用将Java线程映射到pthread的JVM（即Java nio开销超过了上下文切换开销）证明了这一点。 
 
 但是现在我看到所有的“尖端”服务器都使用异步库（Java nio，epoll，甚至node.js）。 这是否意味着异步赢了？ 

I remember 2 or 3 years ago reading a couple articles where people claimed that modern threading libraries were getting so good that thread-per-request servers would not only be easier to write than non-blocking servers but that they'd be faster, too. I believe this was even demonstrated in Java with a JVM that mapped Java threads to pthreads (i.e. the Java nio overhead was more than the context-switching overhead).
 
But now I see all the "cutting edge" servers use asynchronous libraries (Java nio, epoll, even node.js). Does this mean that async won?

原文：https://stackoverflow.com/questions/4929660