This parameter determines the optimisation strategy used, where multiple strategies may be used for an algorithm, with differing costs in terms of memory usage or performance.
Negative values specify a bias towards conservation of memory, positive values a bias towards performance. The larger the magnitude of this parmeter, the greater the bias.
The value of this parameter may be determined by the keyword
opt_strategy. The values of this keyword correspond to the following values for opt_strategy_bias:
This parameter may also be controlled directly by expert users using
the keyword opt_strategy_bias, allowing more extreme biases to
be applied.