python ElementTree xml: parsing fromstring vs building elements
===

Given a large array of numbers where:

    [1, 2, 3, 4 ...] => <tag attrib="1" />
                        <tag attrib="2" />
                        <tag attrib="3" />
                        <tag attrib="4" />
                        ...

Which is more efficient/fast:

a) building them from scratch using `Element("name", attributes)` and appending them to some root

or 

b) `fromstring(str)` where str is the string representation of those tags in the example