![]() ![]() Thank you Fixed an issue with the custom Queue pickler No need to use faster_fifo_reduction anymore. Simplified usage with "spawn" multiprocessing context.Thank you Fixed an obscure issue with the TLSBuffer ctor being called without arguments (guessing it's Cython's weirdness) Added method data_size() to query the total size of the messages in queue (in bytes).(there are also C++ unit tests, should run them if C++ code was altered) Recent PyPI releases v1.4.5 debug ( 'Queue is empty' ) Performance comparison (faster-fifo vs multiprocessing.Queue) System #1 (Intel(R) Core(TM) i9-7900X CPU 3.30GHz, 10 cores, Ubuntu 18.04)ġ producer 1 consumer (200K msgs per producer)ġ producer 10 consumers (200K msgs per producer)ġ0 producers 1 consumer (100K msgs per producer)ģ producers 20 consumers (100K msgs per producer)Ģ0 producers 3 consumers (50K msgs per producer)Ģ0 producers 20 consumers (50K msgs per producer) get ( timeout = 0.1 ) assert True, 'This won \' t be called' except Empty : log. get_many ( max_messages_to_get = 100 ) num_received += len ( messages ) try : q. The size of the buffer is increased gradually to match demand. # get_many() will retrieve as many messages as there are available AND can fit in the pre-allocated memory # buffer. ![]() debug ( 'Queue is full!' ) num_received = 0 while num_received < 100 : # get multiple messages at once, returns a list of messages for better performance in many-to-few scenarios # get_many does not guarantee that all max_messages_to_get will be received on the first call, in fact # no such guarantee can be made in multiprocessing systems. put ( py_obj, timeout = 0.1 ) except Full : log. empty () assert py_obj = retrieved for i in range ( 100 ): try : q. Usage example from faster_fifo import Queue from queue import Full, Empty q = Queue ( 1000 * 1000 ) # specify the size of the circular buffer in the ctor # any pickle-able Python object can be added to the queue py_obj = dict ( a = 42, b = 33, c = ( 1, 2, 3 ), d =, e = '123', f = b 'kkk' ) q. (on a fresh Linux installation you might need some basic compiling tools sudo apt install -reinstall build-essential) Manual build instructions pip install Cython Based on a circular buffer, low footprint, brokerless.Ĭompletely mimics the interface of the standard multiprocessing.Queue, so can be used as a drop-in replacement.Īdds get_many() and put_many() methods to receive/send multiple messages at once for the price of a single lock. ![]() Implemented in C++ using POSIX mutexes with PTHREAD_PROCESS_SHARED attribute. Faster alternative to Python's standard multiprocessing.Queue (IPC FIFO queue). ![]()
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