single thread

基本解释

It's easy to see what to do with a single thread: exit when the user says to quit.
對於單線程程序來說，我們很容易知道是如何終止的：儅用戶退出時程序就退出了。
But a task can be larger than the time/size one would want to spend inside a single thread context.
但是，任務花費的時間／大小可能比我們希望在單獨線程上下文中使用的要多／大。
Even when a program contains only a single thread running on a single processor, a synchronized method call is still slower than an unsynchronized method call.
即使一個程序衹包括一個在單一処理器上運行的單線程，一個同步的方法調用仍要比非同步的方法調用慢。

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