d = {}
d['a'] = 'This string is presumably too long to be auto-interned.'
d['b'] = 'This string is presumably too long to be auto-interned.'
d['a'] is d['b']
di = InternDict()
di['a'] = 'This string is presumably too long to be auto-interned.'
di['b'] = 'This string is presumably too long to be auto-interned.'
di['a'] is di['b']
size efficient dictionary(associative array) implementation