Bill McCloskey landed zones, a.k.a. compartment groups.  This mitigates the overhead of each compartment by allowing all compartments within a zone to share arenas and strings.  Roughly speaking, each tab gets its own zone, and there’s a system zone for Firefox’s internal use.  This was a MemShrink:P1 bug. The following graph from areweslimyet.com shows the … Continue reading MemShrink progress, week 91–92