Hi,
I am trying to judge the performance impact of the following Java code.
String [] arrayStr = new String[20000];
System.out.println(System.currentTimeMillis());
for(i=0;i<arrayStr.length;i++){
String a="aa";
}
System.out.println(System.currentTimeMillis());
Output:
1008319728796
1008319728799
String [] arrayStr = new String[20000];
int length = arrayStr.length;
System.out.println(System.currentTimeMillis());
for(i=0;i<arrayStr.length;i++){
String a="aa";
}
System.out.println(System.currentTimeMillis());
Output:
1008319767200
1008319767221
In my view the first code stub should have been faster as in the second
snippet we are getting an overhead of a instance variable call over an
String [] object compared to the length already computed in the first
one. What is happening behind the scene, I am not aware. Could somebody
please explain.
Thanks,
-ShriKant
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