I agree with Hamish about the analysis of costs and benefits here. Michael
On 6/4/07 1:50 AM, "Hamish" <[EMAIL PROTECTED]> wrote: > Maciej Sieczka wrote: >> Having corrected the options I have tried again, on another machine. >> It shows that "v.type type=point,centroid,line,boundary" is about 35% >> faster than "v.type type=point,centroid; v.type type=line,boundary": > > > the extra time overhead is because it has to open and close the map(s) > an extra time. > > > [Cost]/benefit: the extra time cost should be considered both in light > of 1) how often a user wants to pack multiple conversions on the same > command line (rare <-?-> common), and 2) how big the time penalty is > (including how likely it is the module is to be used within a script > where the extra time is likely to be a significant proportion of the > iteration). > > My feeling WRT this time cost is that multiple conversions at once is > probably more rare than common, and the extra few seconds time penalty > when dealing with vector maps containing millions of features is tiny in > comparison to anything else you will do with a map of that size. > Considering it as just time a > time b is only one part of the story. > To be honest I am much more curious about the shadow of the > functionality change than the small time change. > > > In my mind the benefits of a simple + easy to use and understand > interface outweighs this small dt cost; or the cost of rewriting/ > rethinking the parser logic (when only 2 of 393 modules are > problematic). > > > Hamish > > __________________________________________ Michael Barton, Professor of Anthropology School of Human Evolution & Social Change Center for Social Dynamics & Complexity Arizona State University phone: 480-965-6213 fax: 480-965-7671 www: http://www.public.asu.edu/~cmbarton _______________________________________________ grass-dev mailing list [email protected] http://grass.itc.it/mailman/listinfo/grass-dev
