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Cheney's algorithm, first described in a 1970 ACM paper by C.J. Cheney, is a stop and copy method of tracing garbage collection in computer software systems. In this scheme, the heap is divided into two equal halves, only one of which is in use at any one time.
Loop unrolling, also known as loop unwinding, is a loop transformation technique that attempts to optimize a program's execution speed at the expense of its binary size, which is an approach known as space–time tradeoff.
These choices include: [2] [3] Field sensitivity (also known as structure sensitivity): An analysis can either treat each field of a struct or object separately, or merge them. Array sensitivity: An array-sensitive pointer analysis models each index in an array separately. Other choices include modelling just the first entry separately and the ...
The technique is also known as stop-and-copy. Cheney's algorithm is an improvement on the semi-space collector. A mark and sweep garbage collector keeps a bit or two with each object to record if it is white or black. The grey set is kept as a separate list or using another bit.
The algorithm thus maintains two pointers into the given sequence, one (the tortoise) at x i, and the other (the hare) at x 2i. At each step of the algorithm, it increases i by one, moving the tortoise one step forward and the hare two steps forward in the sequence, and then compares the sequence values at these two pointers.
Pointer jumping or path doubling is a design technique for parallel algorithms that operate on pointer structures, such as linked lists and directed graphs. Pointer jumping allows an algorithm to follow paths with a time complexity that is logarithmic with respect to the length of the longest path. It does this by "jumping" to the end of the ...
The seized drug would have been worth up to NZ$3.8 million, about $2.2 million USD, said the New Zealand Customs Service in a news release Woman Attempting to Smuggle 22 Pounds of Meth Wrapped as ...
A pointer a pointing to the memory address associated with a variable b, i.e., a contains the memory address 1008 of the variable b.In this diagram, the computing architecture uses the same address space and data primitive for both pointers and non-pointers; this need should not be the case.