如果有 100 个虚拟线程同时调用这个方法，第一个获得锁的虚拟线程会占用载体线程 1 秒钟，其他 99 个只能排队等这个载体线程，性能瞬间崩塌。
However, you may often see the words “domain” and “context”, which are basically the same thing – labels.
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Oc says that Reddit is vulnerable to such coordinated influence operations, which can push content up or bury it quickly.