Hi Hilmar,
>SET FILTER - limited to tables of about 20,000 records. For larger tables, it will be too slow.
When using vfp9 with the new option to rushmore-optimize grids (not available in the open beta)quite a few of the above scenarios can be handled with set filter.

Most of the ways to work with "real subsets" (views, cursoradapter, sql cursor) are still faster due to the internal structure of vfx, but you have workable solutions for most of previously uncomfortably slow performance of filtered grids. I've poked a bit into

Yes, probably a few scenarios will be found where rushmore actually slows previous "unoptimized" performance, but that won't be the rule.

my 0.02 EUR

thomas