On 17 October 2005 08:07, Ketil Malde wrote:

BTW, could one cheat by introducing a write barrier manually in some way? Perhaps by (unsafe?) thaw'ing and freeze'ing the arrays when they are modified?

Might be worthwhile: freezing is very quick (basically a single write), thawing is slightly slower (an out-of-line call, but a short one). The effect of freezing will only be felt after a couple of GCs, when everything the array points to is pulled into the old generation and the GC can take it off the mutable list. Cheers, Simon