Why doesn't String's hashCode() cache 0?
- by polygenelubricants
I noticed in the Java 6 source code for String that hashCode only caches values other than 0. The difference in performance is exhibited by the following snippet:
public class Main{
static void test(String s) {
long start = System.currentTimeMillis();
for (int i = 0; i < 10000000; i++) {
s.hashCode();
}
…
