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optimize gcContains function #118

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optimize gcContains function#118
@tiancaiamao

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@tiancaiamao
tiancaiamao
opened on Aug 8, 2025

cora/src/gc.c

Lines 319 to 337 in 24c26bb

static struct heapArena *
gcContains(struct GC *gc, void *p) {
struct heapArena *h = gc->heap;
while (h != NULL) {
if (heapArenaContains(h, p)) {
return h;
}
h = h->next;
}
h = gc->large;
while (h != NULL) {
if (heapArenaContains(h, p)) {
return h;
}
h = h->next;
}
return NULL;
}

Currently the gcContains function is a O(n) operation, if the each heap arean is 64M, and the process memory usage is 8G
Then there will be 128 heap arenas ... it still cost too much.

We can organize the heap arenas as ordered or as tree struct, to reduce the cost to O(logN)

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