Lynn Winebarger <owinebar@gmail.com> writes:

> The second statement was comparing dumped versus undumped performance,
> whether native- or byte- compiled.  This isn't a novel observation,
> but the dump is basically a one-shot mark-compact GC collection, and
> the mmap'ed pdump files would ideally be treated like the old
> generation of a generational collector, and so not traced in most (or
> all) collection cycles.  This is (or should be) one benefit of pure
> space, although the requirement that it be read-only could be dropped
> as long as the write-barrier remains and is used to record any
> inter-generational pointers to a root set traced by the collector.

This (very) minor benefit of pure space is already gone, since it is
unprotected and scanned normally for garbage collection in pdumper
builds.