Abstract: Compile-time recognition of graph structure where graph has arbitrary connectivity and is constructed using recursive computations is provided. In one aspect, the graph structure recognized at compile time may be duplicated at runtime and can then operate on runtime values not known at compile time.

Abstract: Compile-time recognition of graph structure where graph has arbitrary connectivity and is constructed using recursive computations is provided. In one aspect, the graph structure recognized at compile time may be duplicated at runtime and can then operate on runtime values not known at compile time.

Abstract: A method of executing a task includes executing, by using a processor, a first task including a low-frequency task in which garbage is collected using a garbage collector, initializing a second task including a high-frequency task by constructing an instance of a class that implements a standard runnable thread interface, and creating a data structure for supporting communication between the second task and lower priority threads, the data structure being accessible by a thread running in a garbage-collected heap in the first task to communicate data between the high-frequency task and the low-frequency task, validating the second task to ensure that the second task is executable without synchronizing with the first task, instantiating the second task to create a class for executing the second task; and after the instantiating the second task, executing the second task, the garbage collector being preemptable by the second task.

Abstract: A method (and system) for executing a task includes executing a first task in which garbage is collected using a garbage collector, and executing a second task, the garbage collector being preemptable (e.g., preempted) by the second task.

Abstract: A system includes a processor for executing a collector program to perform a method (e.g., a method of collection). The method includes using an object model during a collection phase that is different than an object model used during program execution. The processor may also perform a method including assigning a hash code to at least some objects, and consulting a structure that maintains a mapping of objects to hashcode values to determine said hashcode for one of said objects. The processor may also perform a method including storing a class pointer and garbage collector state information in a single word, and accessing said class pointer by masking out non-class bits.

Abstract: A method (and system) for executing a task includes executing a first task in which garbage is collected using a garbage collector, and executing a second task, the garbage collector being preemptable (e.g., preempted) by the second task.