Github user michaelandrepearce commented on the issue:
https://github.com/apache/activemq-artemis/pull/1263
```
public class Boxing {
public static void main(String... args){
//ensure we max'd out the caching magic.
for (long i = 0; i < 100000000; i++){
Long v = Long.valueOf(i);
}
int times = 1000000000;
long startreference = System.nanoTime();
reference(Long.valueOf(1000000001), times);
long endreference = System.nanoTime();
long startprimitive = System.nanoTime();
primitive(1000000001l, times);
long endprimitive = System.nanoTime();
long startboxing = System.nanoTime();
boxing(1000000001, times);
long endboxing = System.nanoTime();
long startunboxing = System.nanoTime();
unboxing(Long.valueOf(1000000001), times);
long endunboxing = System.nanoTime();
System.out.println("reference :" + (endreference -
startreference));
System.out.println("primitive :" + (endprimitive -
startprimitive));
System.out.println("boxing :" + (endboxing - startboxing));
System.out.println("unboxing :" + (endboxing - startboxing));
}
public static Long reference(Long number, int times){
Long value = null;
for(int i = 0; i < times; i++)
value = number;
return value;
}
public static Long boxing(long number, int times){
Long value = null;
for(int i = 0; i < times; i++)
value = number;
return value;
}
public static long primitive(long number, int times){
long value = -1;
for(int i = 0; i < times; i++)
value = number;
return value;
}
public static long unboxing(Long number, int times){
long value = -1;
for(int i = 0; i < times; i++)
value = number;
return value;
}
}
```
```
reference :1470275
primitive :934418
boxing :4394771377
unboxing :4394771377
```
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