SINGLE-LOCK的意思|示意

Given the single threaded nature of this benchmark, I was fully expecting Escape Analysis to elide the lock thus rendering StringBuffer performance equivalent to that of StringBuilder.

明确了这个基准测试的单线程化的本质后，我期待着逸出分析会消除锁，从而将StringBuffer的性能提到了与StringBuilder相同的水平。

If after replacing these with a single table lock, the MAXLOCKS value is no longer exceeded, lock escalation stops.

如果用一个表锁替换这些行锁，将不再会超出maxlocks值，那么锁升级就会停止。

This means that multiple threads can access different portions of the Map simultaneously, without contending for the single collection-wide lock.

这意味着多个线程可以同时地访问一个Map的不同部分，而不必争用单个的集合范围的锁。

The race conditions illustrated in Listing 1 often make it necessary to hold the single collection lock for much longer than it takes to execute a single operation.

清单1中演示的争用条件常常使得对单个集合的锁在单个操作执行完毕之后还必须继续保持一段较长的时间。

The bigger problem with the synchronized Collections wrappers, and the earlier Hashtable and Vector classes, is that they synchronize on a single lock.

同步的集合包装器以及早期的Hashtable和Vector类带来的更大的问题是，它们在单个的锁上进行同步。

In the case of this single threaded benchmark, it is quite safe for Hotspot to safely elide the lock.

在这个单线程化的基准测试中，Hotspot可以非常安全地将锁省略掉。