Improved Speed Tops List of Enhancements
What'sBest! 4.0 and LINGO 5.0 include a radically faster linear solver, an enhanced nonlinear solver, and increased capacity on linear models. They also include a number of improvements in usability.
The versions solve linear problems faster -- especially large models. The linear solver handles medium size models an average of 5 to 7 times faster. On large, sparse models, the speed up can be over 20 times faster. The improved nonlinear solver handles large models more efficiently and gives the user more control over the algorithm and search techniques. Users can select from three algorithmic options -- a Crash procedure, a Steepest Edge option, and a Sequential Linear Programming procedure. Nonlinear optimization is a separate option to the base packages of What'sBest! and LINGO, which include linear and integer capabilities.
The capacities of these releases have been increased. The Extended versions of What'sBest! and LINGO handle an unlimited number of variables and constraints (i.e., they are limited only by available memory). The variable and constraint limits on all other size versions have been at least doubled.