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Code performance can be tested. The method of testing throughput.
QPS，TPS
QPS: Queries Per Second is the acronym, meaning that the rate of queries per second (maximum throughput)
TPS: Transactions Per Second is the abbreviation, that is, the number of transactions / sec (maximum capacity)
Disruptor basic theory
Disintegration of
high performance, single-threaded processing 6 million orders per second,
the fastest MQ, no lock CAS, stand-alone support high-concurrency
Conventional queues have different structures, the use of an annular Buffer.
List of query speed is definitely slower than the array, compare ConcurrentLinkedQueue: linked list implementation, JDK in but did not ConcurrentArrayQueue, because the array length is fixed, increase the queue elements will be very troublesome.
Disruptor array is implemented, and the ending is connected, directly cover (not clear) of old data, is covered with eight kinds of strategy is most Blockingwait, can reduce the frequency of GC.
That RingBuffer, implemented using an array, there is no ending pointers. Like length hashMap, N power requirements are 2
