Uncontended locking performance has improved with nearly every JVM version.
最近的每个JVM版本都提高了非竞争锁定的性能。
2
The simple tests used here suggest that an uncontended synchronization is cheaper than the cost of an object creation or a HashMap lookup.
这里使用的简单测试是说明一个无争用同步的代价要比创建一个对象或查找一个 HashMap 的代价小。
3
Most locks are not frequently contended, so improving the performance of uncontended locking can improve overall application performance substantially.