- Change object identity calculation to use uniqid
# In all PHP 5 major releases, things have been getting faster and
# faster and faster. In PHP 5.5.0beta1, PHP finally reached a
# speed which on recent hardware can call methods faster than
# the precision of microtime(). This means calling microtime()
# twice in a row will not yield a different result, which is
# something we could previously rely on!
# Fixes most of the todos listed in issue #260