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Developing measures based
on the operators would
give an improved understanding of diversity and of the fitness
However, the complexity of the representation would make these
measures computationally expensive. Approximate measures based on the
operators would require careful consideration of their accuracy.
Intermediate data structures could be used improve the efficiency of
Chapter 5 used a new diversity method based on genetic
lineages. Additional research with this method could yield
more efficient ways to control diversity and search, or easily simulate
mating, niching and island models.
Chapter 6 suggested controlling diversity by adapting selection
pressure, which could lead to slower and more controlled code growth
without fewer negative effects to fitness.
Future work could also characterise the ``effective'' selection pressure
that populations with varying diversity induce.