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Objects are segregated into generations based on their ages. Younger generations are collected more often, reducing the overhead of collecting long-lived objects.

Memory is divided into regions, each of which can be collected independently. Objects are allocated to regions and collected when the region is reclaimed.

Uses three colors to mark objects: white for objects not yet processed, grey for objects that are reachable but whose references haven't been checked, and black for objects that have been processed.

Garbage collection is performed during the execution of a program, running concurrently with the application threads to minimize pause times.

Each object has a count of the number of references to it. When the reference count drops to zero, the object is immediately collected.

This method breaks the garbage collection process into small parts to reduce system freezes. Each small part is executed at different times.

The memory is divided into two equal-sized areas. Live objects are copied from one area to the other, then the original area is cleared at once.