C vs. Java

// courtesy of the incredible cliff click!

// javac bench.java; time java -server bench;
// 1410065408
// 0.056u 0.012s 0:00.09 66.6%    0+0k 0+64io 1pf+0w

// g++ -O bench.cpp; time a.out
// 1410065408
// 25.417u 0.012s 0:25.42 100.0%    0+0k 0+0io 0pf+0w

// Java code:

class B extends bench { int get() { return 1; } }
class C extends bench { int get() { return 2; } }

abstract public class bench {
  abstract int get();
  static final int LEN=100000;
  public static void main(String args[]) {
    bench f = new B();
    int sum=0;
    for( int i=0; i<LEN; i++ )
      sum += f.test();
    System.out.println(sum);
  }

  int test( ) {
    int sum=0;
    for( int i=0; i<LEN; i++ )
      sum += get();
    return sum;
  }

}

// C code:


#include <stdio.h>

#define LEN 100000
struct bench {
  virtual int get() = 0;
  int test(  ) {
    int sum=0;
    for( int i=0; i<LEN; i++ )
      sum += get();
    return sum;
  }
};
class B : public bench {  int get() { return 1; } };
class C : public bench {  int get() { return 2; } };

int main() {
  bench *f = new B();
  int sum=0;
  for( int i=0; i<LEN; i++ )
    sum += f->test();
  printf("%d\n",sum);
}