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The Computer Journal 1985 28(4):375-378; doi:10.1093/comjnl/28.4.375
© 1985 by British Computer Society
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On Efficient Context Switching

A. Ramsay *

Cognitive Studies Programme, University of Sussex, Falmer, UK

It is often convenient to be able to save and subsequently restore the state of a computation. It is also, in general, rather expensive. We present a technique whereby states may be saved and restored extremely fast, and yet the information stored in a given state may be accessed and updated reasonably quickly. This technique depends on an indexing scheme which can be used to see whether the last value assigned to a variable is still valid, or whether it must be retrieved from some previous context.


* Cognitive Studies Programme, University of Sussex, Falmer BN1 9QT


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