To achieve good performance from lazy implementations, it proved necessary to apply strictness annotations to certain commonly-used data structures.
Arbitrary precision integer arithmetic is provided by some implementations of the language.
The Position implementations (marks) store the array index and can easily calculate the sequential position from the current gap location.
Several research groups world-wide aim to advance the methodology of direct silicon implementations in an attempt to exploit the natural parallelism in these networks.
Toolkit This class is the abstract superclass of all actual implementations of the Abstract Window Toolkit.