We have recently been working on gap4 to improve both the speed of certain operations and general memory usage. Feedback is particularly useful for this work. Specifically it would be nice to know what people consider the current problems to be.
Comments please .
Note that the majority of tests have been performed using optimised code on a Dec Alpha system. Also note that the Alpha is a 64 bit machine and so memory usage is typically higher. For comparative purposes some results for gap and xgap have been included for those still using the old programs. The actual changes themselves are not as important as the effect they have. Some changes will apply to gap and xgap as well as gap4.