Add `GC.auto_compact= true/false` and `GC.auto_compact`

* `GC.auto_compact=`, `GC.auto_compact` can be used to control when
  compaction runs.  Setting `auto_compact=` to true will cause
  compaction to occurr duing major collections.  At the moment,
  compaction adds significant overhead to major collections, so please
  test first!

[Feature #17176]

1 files changed, 10 insertions, 0 deletions

diff --git a/NEWS.md b/NEWS.md
index 2fa1b3db2e..ecf9c77aaa 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -262,6 +262,16 @@ Outstanding ones only.
         * Warning#warn now supports a category kwarg.
         [[Feature #17122]]
 
+* GC
+    * New method
+
+        * `GC.auto_compact=`, `GC.auto_compact` can be used to control when
+          compaction runs.  Setting `auto_compact=` to true will cause
+          compaction to occurr duing major collections.  At the moment,
+          compaction adds significant overhead to major collections, so please
+          test first!
+          [[Feature #17176]]
+
 ## Stdlib updates
 
 Outstanding ones only.