other

Compact object headers

A HotSpot feature that shrinks the per-object header the JVM stores with every heap object, cutting the memory spent on object metadata.

Known aliases

UseCompactObjectHeaders

Relationships

No evidence-backed relationships are recorded.

Current clusters

build1 publisher

G1 replaces Serial GC as JDK 27's default on resource-constrained systems

JDK 27 drops the automatic fallback to Serial GC on limited hardware. A JVM in a tight container now gets G1 unless an operator asks for something else, and compact object headers move footprint in the same release.

Publishers:inside.java

Reality

Evidence62
Adoption28
Hype gap−12
Incentives68
Confidence58