JNI Performance

[Kuanlin-Chen]

I added the code in MainActivity to test the performance.

long start = System.currentTimeMillis();
for(int i=0; i<10000; i++)
{
data = AESCryptor.crypt(data, System.currentTimeMillis(), 0);
}
long end = System.currentTimeMillis();
System.out.println("JNI_AESCryptor Time="+(end-start));

And I got about 43 second each time.
But the JavaAESCryptor.encrypt always ran about 7 second.

What makes these happening?
Maybe my test method was wrong?