JavaScript Object Recycling Mechanism

JS maintains an object reference table:

When an object is created, there is a a,a in the stack this object points to this address, and when a=new person () executes, the number of references is added to 1. When A=null is empty, the number of citations is reduced by 1. The system maintains the object reference table.

When the number of references is 0 o'clock, the address of this space is considered a garbage. Our garbage collection mechanism will recycle it. Of course, is not immediately recycled it? This should be based on the actual situation. Some browsers execute immediately; some browsers see insufficient memory for recycling.

JS also provides a way to automatically destroy object properties

The basic syntax is:

Detete object name. property name//Do not delete object like this

JavaScript Object Recycling Mechanism