Summary: Changes to default and ergonomic flag values recommended by performance team. Changes were also reviewed by Monica Beckwith <monica.beckwith@oracle.com>.
Reviewed-by: brutisso, huntch

Summary: Also reviewed by: vitalyd@gmail.com
Reviewed-by: coleenp, acorn

Reviewed-by: coleenp, dholmes

Reviewed-by: ysr, johnc, jwilhelm

Reviewed-by: dholmes, stefank
Contributed-by: erik.helin@oracle.com

Reviewed-by: jcoomes