... def run(self):#运行一个线程 thread = WorkerThread(self.count, self)#创建一个线程 thread.start()#启动线程 ...
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即使只运行一个线程，崩溃版的速度也要快约30%：获取您已占用的锁比获取无人占用的锁要快得多。
Even when run with a single thread, the collapsed version was some 30 percent faster: it is much faster to acquire a lock that you already hold than one that nobody holds.
在libspe2中，这个操作变成同步的了，因此您可能会希望在后台运行一个线程，并发出自己的pthread调用。
In libspe2, the operation is synchronous, so if you want to run a thread in the background, you have to make your own pthread calls.
当一个线程在运行的时候，不管是上传还是下载，你可以查询进程状态并且给用户一个反馈（例如一个进度条）。
While a thread is running, either uploading or downloading, you can query it to check on its status to provide the user with feedback (e.g. a progress bar).
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