(2013/02/07 12:20), "Martin J. Drst" wrote:
> 
> Anyway, this is just an idea, there may be quite a few downsides to it.

The downside is performance and availability. Mark will be spread wide
and wide. And it is difficult to find out all of marking places.

However, for example using Boeham GC will be good solution to do it.

We need challengers :)

-- 
// SASADA Koichi at atdot dot net