gc corner

Short, interactive decks on garbage-collection algorithms — step through each phase.

Building a corner for garbage collectors — one algorithm per deck, each stepped through phase by phase. Use the arrow keys (or click) to advance.

Jul 2026
Mark and Sweep tracing
The oldest tracing collector, one phase at a time: mark reachable objects from the roots, then sweep the rest. Where fragmentation comes from, and why it motivates compaction.