即使在并发编写者在场的情况下，即使阅读也需要锁定.所以，是的，这和变异字典一样好.

Locking is required even for reading in the presence of concurrent writers. So yes, this is as good as it gets if you mutate the dictionary.

当然，每次写东西时，您总是可以为整个词典创建一个副本.这样，读者可能会看到过时的版本，但他们可以放心地阅读.

You can of course always create a copy of the entire dictionary each time something is written. That way readers might see an out-of-date version but they can safely read.