Copying collection has the advantage of only visiting live objects, which means garbage objects will not be examined, nor will they need to be paged into memory or brought into the cache.
复制收集的优点是只访问活跃的对象，这意味着不会检查垃圾对象，也不需要将它们页交换到内存中或者送到缓存中。
As the nursery size is expanded and the time between nursery collects increases, you do less copying on average, and the overhead of garbage collection drops.
随着托儿所空间大小和托儿所收集之间的时间间隔增加，需要复制的数据量通常会随之减少，垃圾收集的开销也会随之降低。
In addition to the copying and mark-compact collectors used by default, the 1.4.1 JDK also contains four other garbage collection algorithms, each of which is suited to a different purpose.
除了默认情况下使用的复制收集器和标记-整理收集器，JD K 1.4.1还包含其他四种垃圾收集算法，每一种适用于不同的目的。
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