CLDR Ticket #8913(accepted tools)
Don't use Pair or Row as key in map
|Reported by:||mark||Owned by:||mark|
When a pair is used as a key, it means that in effect, every lookup turns into an object creation. More efficient to use a ChainedMap.
Example: bcp47Aliases in SupplementalDataInfo
Ok to use Pair/Row in map values.