Parallel.For的用法 [英] Usage of Parallel.For

问题描述

如何使下面的代码没有锁而平行

How can I make the code below parallel, without locks

List l = new List();        
foreach (var item in sourceCollection)
{
    L.Add(Process(item));
}

我更喜欢c#3.5的答案，但4.0也可以

I prefer answers for c# 3.5, but 4.0 will be also ok

推荐答案

下面是一个示例，该示例采用一系列数字，对每个数字并行执行一些代价高昂的运算，然后汇总结果(不并行). /p>

Here's an example of taking a sequence of numbers, performing some costly operation on each of them in parallel, and then aggregating the result (not in parallel).

int[] numbers = { 1, 1, 2, 3, 5, 8, 13 };
int[] squaredNumbers = new int[numbers.Length];
Parallel.For(0, numbers.Length, i => squaredNumbers[i] = (int)Math.Pow(numbers[i], 2));
int sum = squaredNumbers.Sum();

请小心在委托中执行的操作中的线程安全性.

Just be careful about thread safety in the operation you perform in the delegate.

这篇关于Parallel.For的用法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！