Module stats 

Arena/table stats shared across engine lanes.

These are cheap, lane-neutral diagnostic shapes: integer counts and rough byte estimates, not raw plane internals.

Structs

DomArenaStats

Cheap live stats for a DOM arena.

DomNodeKindStats

Per-kind live-node counts for a DOM arena.

LayoutBatchStats

Cheap stats for the last incremental-layout batch.

Enums

LayoutApplyKind

What the last incremental-layout batch did.

LayoutDamageClass

Coarse damage class for the last batch.