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Garbage collection is useful

devlog: garbage collection is usefulNovember 14, 2025 A long time ago, I spent a few years working on garbage collection in the J9 Java VM.1 And even though I’ve since done mostly done higher-level stuff, having a deeper knowledge of GC has continued to come in useful. Yesterday, it was an insight from one of my favourite GC papers, A Unified Theory of Garbage Collection, which helped me solve a tricky problem.

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