使用展鹏探查使用以下代码
class Program
{
static string data = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz";
static Dictionary<string, string> values;
static void Main(string[] args)
{
Console.WriteLine("Data length: " + data.Length);
values = new Dictionary<string, string>()
{
{ "ab", "aa" },
{ "jk", "jj" },
{ "lm", "ll" },
{ "yz", "zz" },
{ "ef", "ff" },
{ "st", "uu" },
{ "op", "pp" },
{ "x", "y" }
};
StringReplace(data);
StringBuilderReplace1(data);
StringBuilderReplace2(new StringBuilder(data, data.Length * 2));
Console.ReadKey();
}
private static void StringReplace(string data)
{
foreach(string k in values.Keys)
{
data = data.Replace(k, values[k]);
}
}
private static void StringBuilderReplace1(string data)
{
StringBuilder sb = new StringBuilder(data, data.Length * 2);
foreach (string k in values.Keys)
{
sb.Replace(k, values[k]);
}
}
private static void StringBuilderReplace2(StringBuilder data)
{
foreach (string k in values.Keys)
{
data.Replace(k, values[k]);
}
}
}
- =与string.replace 5.843ms
- StringBuilder.Replace#1 = 4.059ms
- Stringbuilder.Replace#2 = 0。461ms
字符串长度= 1456
StringBuilder的#1创建的方法StringBuilder的同时#2没有这样的表现差异最终会被相同的最有可能的,因为你只是移动的工作了的方法。如果你从一个字符串开始而不是一个字符串,那么#2可能是改变方向。
至于内存,采用RedGateMemory探查,没有什么可担心的,直到你到许多替换其中的StringBuilder是要全面赢得业务。
标记和值的模式(长度)是什么? –
短。标记5-15,值5-25 –
可能的重复http://stackoverflow.com/questions/287842/is-stringbuilder-replace-more-efficient-than-string-replace –