Programmer Think

ThreadLocal ThreadLocal is called Thread local variable. It creates a copy of the variable in each Thread. Each Thread accesses and modifies the copy of the variable in this Thread, but the variables between threads cannot access each other. ThreadLocal is not a Thread. ThreadLocal has four methods: ThreadLocal action ThreadLocal allows th ...

Thread closure concept When multiple threads access shared variable data, it will involve the problem of data synchronization between threads. If the data is enclosed in their own threads, there is no need to synchronize, and there will be no thread safety problem. This technique of avoiding synchronization by enclosing data in threads is ...

1, Introduction to ThreadLocal ThreadLocal is called thread variable, which means that the variable filled in ThreadLocal belongs to the current thread and is isolated from other threads, that is, the variable is unique to the current thread. ThreadLocal creates a copy of the variable in each thread, so each thread can access its own int ...

Sling ThreadLocal and talk about why FastThreadLocal can be so fast?1 Introduction background and principle of fastthreadlocalSince jdk already has a ThreadLocal, why should netty create a FastThreadLocal? Where is FastThreadLocal?This needs to start with jdk ThreadLocal itself. As shown below:In a java thread, Each thread has a ThreadLocalMap ...