StringBuilder和string.Format性能对比

本文由博主(YinaPan)原创，转载请注明出处：http://www.cnblogs.com/YinaPan/p/sbformat.html

StringBuilder的性能优于string.Format，但是需要格式化的东西不多时，性能差距不大。

using UnityEngine;

using System.Collections;

using System.Text;

public class Test_sb_Format : MonoBehaviour {

    private StringBuilder m_sb = new StringBuilder();

    private string m_result = null;

    private int m_count = ;

    void TestSb1() {

        StringBuilder sb = new StringBuilder();

        for (int i = ; i < m_count; ++i) {

            sb.Append("Test_");

            sb.Append(i);

            m_result = sb.ToString();

        }

    }

    void TestSb2() {

        for (int i = ; i < m_count; ++i) {

            m_sb.Length = ;

            m_sb.Append("Test_");

            m_sb.Append(i);

            m_result = m_sb.ToString();

        }

    }

    void TestFormat() {

        for (int i = ; i < m_count; ++i) {

            m_result = string.Format("Test_{0}", i);

        }

    }

    void TestAdd() {

        for (int i = ; i < m_count; ++i) {

            m_result = "Test_{0}" + i;

        }

    }

    void Update () {

        Profiler.BeginSample("TestSb1");

        TestSb1();

        Profiler.EndSample();

        Profiler.BeginSample("TestSb2");

        TestSb2();

        Profiler.EndSample();

        Profiler.BeginSample("TestFormat");

        TestFormat();

        Profiler.EndSample();

        Profiler.BeginSample("TestAdd");

        TestAdd();

        Profiler.EndSample();

    }

}