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循环编译器优化(Loop compiler optimization)

我需要优化大量使用linq的大型应用程序。 许多linq语句在linq扩展方法中创建匿名对象。 一个例子 :-

// custom sort order
var sortedData = data.OrderBy(x => (new List<string>() {"Orange", "Apple", "Pear" }).IndexOf(x.Name));
foreach (var d in sortedData) {
    ....

问题是每个迭代都会创建一个新的List。

是否有一个编译器标志可以让编译器进行一些静态分析并将循环不变代码提取到循环之外?


I have a need to optimize a large apps that use linq extensively. Many of the linq statements create anonymous objects within the linq extension methods. An example :-

// custom sort order
var sortedData = data.OrderBy(x => (new List<string>() {"Orange", "Apple", "Pear" }).IndexOf(x.Name));
foreach (var d in sortedData) {
    ....

The problem is that a new List gets created for every iteration.

Is there a compiler flag I can set to get the compiler to do some static analysis and extract the loop invariant code to be outside of the loop?


原文:https://stackoverflow.com/questions/13861756
更新时间:2023-06-11 09:06

最满意答案

您可以避免在php中使用isset将空白数据提交到wordpress表中

if(!empty($_POST['streamname'])) {

// the code
}

看到一个..希望它有用


You can avoid submitting blank data into the wordpress table by using isset in php

if(!empty($_POST['streamname'])) {

// the code
}

See this one ..Hope it was helpful

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