Thread Process Overview

Process and thread purpose, improve execution efficiency 1, single-process single-threaded, main process, main thread 2, custom thread:    main thread        thread thread        process:    advantages, while utilizing multiple CPUs, can simultaneously carry out multiple operation    shortcomings, consume resources, (Re-open memory) Threads:    advantages, shared memory, IO operation time, create concurrency Operation    disadvantage, preemption resource process is not the more the better, the number of CPUs = equals the number of process threads is not more about good, specific case specific analysis of the computer to perform the task of the smallest unit is: Thread IO Operations take advantage of Cpugil, global interpreter lock IO-intensive (CPU-free)    multithreaded compute-intensive (with CPU)    multi-process

　　

Thread Process Overview