Ruby Garbage Collection Deep Dive: Compaction

So far in this series, we’ve discussed GC::INTERNAL_CONSTANTS, the Tri-Color Mark and Sweep algorithm, Generational GC and Incremental GC. We’ll build on what we’ve learned in this post about the newest addition to Ruby’s GC: compaction. Fragmentation Before we dive into compaction, we need to learn about fragmentation. Fragmentation is the term we use to describe memory when it’s allocated non-co