The current GC is both inefficient and can have very long pause times.
The efficiency can be improved by tweaking thresholds or by using fewer generations (see #100403), but that does nothing to shorten pause times.

We should use an incremental collector, it can improve efficiency and hugely reduce maximum pause times.

See #100403 for more details on the general idea and the algorithm.

Linked PRs

• GH-108362: Incremental GC implementation #108038
• GH-108362: Set old space for objects in finalizer list before adding to old space #115084
• GH-108362: Revert "GH-108362: Incremental GC implementation (GH-108038)" #115132
• GH-108362: Incremental GC implementation #116199
• GH-108362: Incremental GC implementation #116206
• gh-108362: Retarget incremental GC changes to 3.14 #125453
• [3.14] gh-108362: Retarget incremental GC changes to 3.14 (GH-125453) #136851