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Jidong Xiao
2023-11-25 00:19:40 -05:00
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lectures/25_garbage_collection/README.md
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@@ -150,18 +150,18 @@ stack:
- Stop & Copy:
- - requires a long pause in program execution
- \- requires a long pause in program execution
- \+ can handle cyclical data structures!
- – requires 100% extra memory (you can only use half the memory)
- \– requires 100% extra memory (you can only use half the memory)
- \+ runs fast if most of the memory is garbage (it only touches the nodes reachable from the root)
- \+ data is clustered together and memory is “de-fragmented”
- Mark-Sweep:
- - requires a long pause in program execution
- \- requires a long pause in program execution
- \+ can handle cyclical data structures!
- \+ requires ∼1% extra memory (just one bit per node)
- - runs the same speed regardless of how much of memory is garbage.
- \- runs the same speed regardless of how much of memory is garbage.
It must touch all nodes in the mark phase, and must link together all garbage nodes into a free list.
## 25.11 Practical Garbage Collection Methodology in C++: Smart Pointers