
we shouldn't use <array>.extend([<generator>]) it's similiar to <array>.extend(<generator>) but slower Change-Id: Ic859e9a477f03b680e1ac0db1498261a3dc24997
we shouldn't use <array>.extend([<generator>]) it's similiar to <array>.extend(<generator>) but slower Change-Id: Ic859e9a477f03b680e1ac0db1498261a3dc24997