当创建一个具有内部私有(private)方法的类时，通常是为了减少代码重复，不需要使用任何实例字段，将方法声明为静态是否有性能或内存优势？
例子:
foreach (XmlElement element in xmlDoc.DocumentElement.SelectNodes("sample"))
{
string first = GetInnerXml(element, ".//first");
string second = GetInnerXml(element, ".//second");
string third = GetInnerXml(element, ".//third");
}
...
private static string GetInnerXml(XmlElement element, string nodeName)
{
return GetInnerXml(element, nodeName, null);
}
private static string GetInnerXml(XmlElement element, string nodeName, string defaultValue)
{
XmlNode node = element.SelectSingleNode(nodeName);
return node == null ? defaultValue : node.InnerXml;
}
将 GetInnerXml() 方法声明为静态方法有什么好处吗？没有意见请回复，我有意见。
最佳答案
来自FxCop rule page对此:
After you mark the methods as static, the compiler will emit non-virtual call sites to these members. Emitting non-virtual call sites will prevent a check at runtime for each call that ensures that the current object pointer is non-null. This can result in a measurable performance gain for performance-sensitive code. In some cases, the failure to access the current object instance represents a correctness issue.
关于c# - 使用私有(private)静态方法的优势，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/135020/