event_map_maybe_GC: use a flat array when computing the distribution
(counts) of generation numbers in the oldrefTree, instead of using a
WordFM as an associative array.  This significantly accelerates the
event map garbage collector.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8794 a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed