[英]Using reflection to order properties is slow
I'm using this solution to create an OrderAttribute to order my properties. 我正在使用此解决方案创建一个OrderAttribute来对我的属性进行排序。 The output is what I expect, but now that I have profiled the code, I am realizing that GetCustomAttributes is being called way more times than I would like.
输出是我所期望的,但是现在我已经分析了代码,我意识到GetCustomAttributes被调用的次数比我想要的要多。 What would be the best way for me to optimize this for performance?
对我而言,优化性能的最佳方法是什么?
var ordFunc = new Func<System.Reflection.PropertyInfo, int>(p => ((OrderAttribute) p.GetCustomAttributes(typeof (OrderAttribute), false)[0]).Order);
foreach (var obj in objects)
{
fileWriter.WriteLine(String.Join(",", obj.GetType().GetProperties().OrderBy(ordFunc).Select(x => x.GetValue(obj).ToString())));
}
Regarding to Sergey's tip. 关于谢尔盖的小费。
var ordFunc = new Func<System.Reflection.PropertyInfo, int>(p => ((OrderAttribute) p.GetCustomAttributes(typeof (OrderAttribute), false)[0]).Order);
if(!objects.Any())
return;
var properties = objects.First().GetType().GetProperties()
.OrderBy(ordFunc)
.ToArray();
foreach (var obj in objects)
{
fileWriter.WriteLine(String.Join(",", properties.Select(x => x.GetValue(obj).ToString())));
}
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