c, cs, vala 性能简单测试

分别用c, cs 和 vala 完成同样的运算：

#include

#include

int main()

{

  printf('c for beginn');

  int count = 1000000000;

  int i;

  for(i=0;i  {

    ;

  }

  printf('c for endn');

  printf('int add beginn');

  int ncount = 1000000000;

  int n = 0;

  int j;

  for(j=0;j  {

    int a = 3;

    int b = 4;

    n = a + b;

  }

  printf('%d', n);

  printf('int add endn');

  printf('float add beginn');

  int fcount = 10000000;

  float f = 0.0f;

  int k;

  for(k=0;k  {

    float a = 3.0f;

    float b = 4.0f;

    f = a + b;

  }

  printf('%f', f);

  printf('float add endn');

  return 0; 

}

测试结果：

user@mojo:~/Projects/performance/c$ time ./c 

c for begin

c for end

int add begin

7int add end

float add begin

7.000000float add end

real    0m49.264s

user    0m46.450s

sys    0m0.010s

user@mojo:~/Projects/performance/cs$ time mono main.exe

c for begin

c for end

int add begin

7

int add end

float add begin

7

float add end

real    1m37.252s

user    1m31.880s

sys    0m0.135s

user@mojo:~/Projects/performance/vala$ time ./main

c for begin

c for end

int add begin

7int add end

float add begin

7.000000float add end

real    1m14.979s

user    1m10.995s

sys    0m0.020s

ps: 以上测试全部在SmartQ5 (cpu: s3c6410 arm11 667MHz, ram: 128M)上完成, 其间也测试了python和lua，结论是基本上没有可比性，类死机状态。