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
create a long chain of removed sentinels. Also, when adding k to a table where k is not mapped, but where k hashes to a chain that includes removed sentinels, recycle the first removed sentinel in the chain for k's entry. 2. Cache cx->resolving till js_DestroyContext, to avoid high JSDHashTable new/destroy overhead in js_LookupProperty. 3. Add NS_TraceStack to nsTraceMalloc.[ch] and clean the .c file up a bit.