- Go 1.26 made Green Tea the default garbage collector, improving cache-friendliness.
- Go's non-moving GC lacks compaction, causing memory fragmentation and inability to reclaim sparse pages.
- Experiments show Green Tea GC reduces L1 cache misses and improves performance despite higher L3 miss rates.
- Manual copying can simulate compaction in Go to reduce fragmentation, unlike C#'s automatic compacting GC.
- Go allocates same-size objects together in spans, while C# interleaves objects of different sizes.
- Green Tea GC scans spans for pointers instead of following each pointer, reducing random memory access.