1 determines whether an object needs to be transferred through the ages counter.
1 determines whether an object needs to be transferred through the ages counter. Each object through a GC is still alive, the age counter is incremented by one. When the value is over the age set, then it is transferred to the old year by the guarantee mechanism.
2. or dynamic binding, when Suvivor the same age, more than half the number of objects is older than the age of the object is equal to the transfer of old time, without waiting for the maximum age was set.
3. Large objects directly into the old era.
Reprinted address: https: //my.oschina.net/134596/blog/1636201
