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LibJS: GC: Remove clear_all_mark_bits()

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Clearing all marked flags has been integrated into the sweep function,
saving an additional full iteration over the heap.
This commit is contained in:
Stephan Unverwerth 2020-03-08 23:17:34 +01:00 • committed by Andreas Kling
parent b956e2d939
commit 1207187e97
2 changed files with 7 additions and 14 deletions
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20
Libraries/LibJS/Heap.cpp
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@ -66,7 +66,6 @@ void Heap::collect_garbage()
HashTable<Cell*> live_cells;
visit_live_cells(roots, live_cells);
clear_all_mark_bits();
mark_live_cells(live_cells);
sweep_dead_cells();
}
@ -114,15 +113,6 @@ void Heap::visit_live_cells(const HashTable<Cell*>& roots, HashTable<Cell*>& liv
#endif
}
void Heap::clear_all_mark_bits()
{
for (auto& block : m_blocks) {
block->for_each_cell([&](Cell* cell) {
cell->set_marked(false);
});
}
}
void Heap::mark_live_cells(const HashTable<Cell*>& live_cells)
{
#ifdef HEAP_DEBUG
@ -147,11 +137,15 @@ void Heap::sweep_dead_cells()
#endif
for (auto& block : m_blocks) {
block->for_each_cell([&](Cell* cell) {
if (cell->is_live() && !cell->is_marked()) {
if (cell->is_live()) {
if (!cell->is_marked()) {
#ifdef HEAP_DEBUG
dbg() << " ~ " << cell;
dbg() << " ~ " << cell;
#endif
block->deallocate(cell);
block->deallocate(cell);
} else {
cell->set_marked(false);
}
}
});
}