Reflection performance optimize

I have used the reflection to get the value like a below one.

this.GetRflValue(list[i], propertyName)

internal object GetRflValue(object cmp, string prp)

{

if (this.propInfo.TryGetValue(prp, out pInfo))


{

o = pInfo.GetValue(cmp, null);

   }

}

Here propInfo is a dictionary and it has //cmp.GetType().GetProperties();// value, still i have loaded this at once. But it take much time to iterate my whole record, so please suggest and give the example to achieve this case with user friendly performance.