Right way to get bulk xfroms

[theodox]

it's easy to get Xform queries for one object at a time, but there doesn't appear to be a fast way to do bulk Xform queries. Something like Selected().get(Positions, worldSpace = True) is attractive but before committing to it i'd like to make sure it's performant

The below works for one object at a time but not for streams due to this limitation

from minq import *
from itertools import islice
from maya.api.OpenMaya import MVector    


class Xform(Projection):

    QUERY = 'pivots'

    def __iter__(self):
        kw = {'q': True}
        kw[self.QUERY] = True
        kw.update(**self.kwargs)
        a,b,c =  itertools.tee(command_stream(self.incoming, cmds.xform, q=1, t=1, ws=1),3)
        triples =  itertools.izip_longest(
            itertools.islice(a, 0, None, 3),
            itertools.islice(b, 1, None, 3),
            itertools.islice(c, 2, None, 3)
        )
        return itertools.imap(MVector, triples)

class Positions(Xform):
   QUERY='translation'

class Rotations(Xform):
   QUERY = 'rotation'

class Scales(Xform):
   QUERY = 'scale'


Selected().get(Positions, worldSpace = True)

[theodox]

Tried to solve this with the WorldPositions and LocalPositions classes