I think I recall that Ruby 1.8 was supposed to get a new garbage
collector. It appears not to be the case. However, I wonder whether
there's a patch that I could apply to Ruby (1.6.8 or 1.8.0) that would
improve the "realtimeness" of Ruby in any way. Specifically, I mean
anything that would make the worst-case duration of a GC interruption
smaller.

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Mathieu Bouchard                       http://artengine.ca/matju