Snapman系统中TCC执行效率和C#执行效率对比

Snapman集合了TCC编译器可以直接编译执行C语言脚本，其脚本执行效率和C#编译程序进行效率对比，包括下面3方面：

1、函数执行效率

2、数字转换成字符串

3、字符串的叠加

这是C#代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace TestEfficiency
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        int fibonacci(int n)
        {
            if (n == 1 || n == 2)
                return 1;
            return fibonacci(n - 1) + fibonacci(n - 2);
        }
        string numberConvert()
        {
            string result = "";
            for (int i = 0; i < 14000000; i++ )
            {
                result = i.ToString();
            }
            return result;
        }
        string stringAppend()
        {
            string conc = "StringBuilder sb = new StringBuilder(1024);";
            StringBuilder sb = new StringBuilder(1024);
            for (int i = 0; i < 1400; i++)
            {
                sb = new StringBuilder(1024);
                for (int j = 0; j < 10000; j++ )
                {
                    sb.Append(conc);
                }
            }
            return sb.ToString();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            DateTime fbeforDT = System.DateTime.Now;
            fibonacci(45);
            DateTime fafterDT = System.DateTime.Now;
            TimeSpan ts = fafterDT.Subtract(fbeforDT);
            textBox1.Text = string.Format("fibonacci spend: {0}ms.", ts.TotalMilliseconds);

            DateTime nbeforDT = System.DateTime.Now;
            numberConvert();
            DateTime nafterDT = System.DateTime.Now;
            TimeSpan nts = nafterDT.Subtract(nbeforDT);
            textBox2.Text = string.Format("numberConvert spend: {0}ms.", nts.TotalMilliseconds);

            DateTime sbeforDT = System.DateTime.Now;
            stringAppend();
            DateTime safterDT = System.DateTime.Now;
            TimeSpan sts = safterDT.Subtract(sbeforDT);
            textBox3.Text = string.Format("stringAppend spend: {0}ms.", sts.TotalMilliseconds);
        }
    }
}

这是C#编译出来Release的页面：

这是Snapman系统中写的TCC脚本代码：

int fibonacci(int n)
{
    if(n==1||n==2)
        return 1;
    return fibonacci(n-1) + fibonacci(n-2);
}
char* numberConvert()
{
    char* result = (char*)malloc(128);
    for (int i = 0; i < 14000000; i++ )
    {
        itoa(i,result,10);
    }
    return result;
}
char* stringAppend()
{
    char* conc = "StringBuilder sb = new StringBuilder(1024);";
    char* sb = (char*)malloc(1024),*p;
    int len = 1024, cl = strlen(conc), curlen = 0;
    for (int i = 0; i < 1400; i++)
    {
        free(sb);
        len = 1024;
        curlen = 0;
        sb = (char*)malloc(1024);
        for(int j = 0; j < 10000; j++)
        {
            if(curlen + cl > len)
            {
                p = (char*)malloc(len*2);
                memcpy(p,sb,curlen);
                free(sb);
                sb = p;
                len *= 2;
            }
            memcpy(sb+curlen,conc,cl);
            curlen += cl;
        }
    }
    sb[curlen] = 0;
    return sb;
}
void main()
{
    int starTicc = GetTickCount();
    fibonacci(45);
    wPrint(L"fibonacci spend: %dms",GetTickCount() - starTicc);

    starTicc = GetTickCount();
    free(numberConvert());
    wPrint(L"numberConvert spend: %dms",GetTickCount() - starTicc);

    starTicc = GetTickCount();
    free(stringAppend());
    wPrint(L"stringAppend spend: %dms",GetTickCount() - starTicc);
}

这是Snapman页面：

两种代码的设计和实现方法完全一样，其运行结果对比：

C#执行结果：

Snapman执行结果：

结论：对比结果发现C#除了最高效的StringBuilder和TCC字符串操作执行速度接近外其他的运行速度都要比Snapman的运行速度慢一些，所以Snapman的脚本运行速度是非常快速的。

Snapman的主页：http://www.snapman.xyz