python garbage collection example

. For example, a temporary object in a method becomes a useless object when the method call is complete, and its memory can be freed at this time. (2)Javaprovides some classes for garbage collection and provides a way to enforce garbage collection--calledSystem.GC (), but th

) Compliant with garbage collection As an optimization technique during the compilation process, the Java compiler can choose to assign values to the instance to null mark the instance as recyclable.Class Animal {public static void Main (string[] args) { Animal lion = new Animal (); System.out.println ("Main is completed."); protected void Finalize () { System.out.pr

Scope: which areas to recycle Of the five memory models of the JVM, three are not garbage collected: program counters, JVM stacks, local method stacks. Because their lifecycles are synchronized with threads, the memory they occupy is automatically freed as the threads are destroyed, so only the method area and heap need to be GC. Premise: How to Tell if an object is dead All garbage

Java garbage collection mechanism concepts This article is an example of the Garbage Collection Handbook that will be published in a few weeks. At the same time, you can be familiar with the basic knowledge of garbage

, the cost is small, basically the reference count is 0 when the garbage will be recovered immediately, and other methods difficult to predict the life cycle of the object, the garbage will exist more time than this method. In addition, this garbage collection method produces the shortest interruption time.Cons: The mo

in the 老年代 , can not use the replication algorithm, which spawned another 老年代 characteristic of the algorithm: marker-collation algorithm.The idea of the algorithm is that the process of tagging is consistent with the "mark-sweep" algorithm, except that the next step is not to clean up the recyclable objects directly, but rather to let all surviving objects move toward one end of the memory space and then directly clean out the memory outside the boundary of the other end of the memory, using t

Basic recycling Algorithm 1. reference counting)The old recycling algorithm. The principle is that this object has a reference, that is, adding a count. deleting a reference reduces the count. During garbage collection, only objects with zero collection count are used. The most critical issue of this algorithm is that it cannot handle circular references.2. Mark-

A survey of garbage collection and the changes CLR 4.0 brings in-series of what is new in CLR 4.0IntroductionGarbage Collection in. net is a very important mechanism. this article will talk about the improvements CLR4.0 has made to garbage collection. to better understand th

collector recycles much more memory each time. (If you do not recycle enough memory, the garbage collector performs a full collection, and if there is not enough memory, it throws a OutOfMemoryException exception).The above is the No. 0 generation example, and the 1th and 2 generations are also the same.Garbage collection