c thread pool

Optimizing multithreaded programming with a thread poolUnderstanding Thread PoolsIn Java, all objects need to be created with the new operator,If you create a large number of short-life-cycle objects, the performance of the entire program will be very low.This is the time to use the technology of the pool, such as database connection

Sun has made a lot of extensions to Java Thread class libraries in Java 5. Among them, the thread pool is one of the new features of Java 5. Besides the thread pool, there are also a lot of multithreading-related content, it brings great convenience to multi-threaded program

Reference: http://blog.csdn.net/madun/article/details/20313269Create a thread poolExecutorservice service= Executors.newfixedthreadpool (nthreads);Commit Thread:// TODO has a return status of processing service.submit (new loaddatathread (Startdocid, Enddocid, Lucenefiledir, the. Queue,this. docs));Thread-Safe queues:linkedblockingqueueNew linkedblo

Multithreaded model design is a more complex logic, but python for multi-threaded processing has a variety of convenient class library, do not need too much tangled threading between the details of the operation. Like multiprocessing. Pool is one of them. The official example is also very simple. From multiprocessing import pooldef F (x): return x*xif __name__ = = ' __main__ ': pool =

Optimizing multithreaded programming with a thread poolUnderstanding Thread PoolsIn Java, all objects need to be created with the new operator,If you create a large number of short-life-cycle objects, the performance of the entire program will be very low.This is the time to use the technology of the pool, such as database connection

When a multi-threaded program is compiled using a thread pool, some statistics are required when all tasks are completed. Statistics must be completed in all tasks. So let the main thread wait for all tasks to complete. You can use ThreadPoolExecutor. awaitTermination (long timeout, TimeUnit unit ). See the sample code: Package com. chenlb;Import java. util. Rand

Package Com.psd.test;import Java.util.arraylist;import Java.util.date;import java.util.list;import Java.util.concurrent.executorservice;import Java.util.concurrent.executors;import Java.util.concurrent.TimeUnit; Import Org.junit.test;public class Threaddemo {//Use thread pool, length 2private final static executorservice pool = Executors.newfixe Dthreadpool (2);

The concept of a first-thread pool and why it needs a thread pool:We know that when we create a thread ourselves, if that thread goes into a dead state when it finishes the task, so that if we need to recreate a thread when we use